ni_nitdoc: added fast copy past utility to signatures.

[nit.git] / c_src / standard___collection___array._sep.c

diff --git a/c_src/standard___collection___array._sep.c b/c_src/standard___collection___array._sep.c
index 391ec15..f7d2626 100644 (file)
--- a/c_src/standard___collection___array._sep.c
+++ b/c_src/standard___collection___array._sep.c
@@ -1,27 +1,30 @@
 /* This C file is generated by NIT to compile module standard___collection___array. */
 #include "standard___collection___array._sep.h"
+static const char LOCATE_standard___collection___array___AbstractArrayRead___length[] = "array::AbstractArrayRead::(abstract_collection::Collection::length)";
 val_t standard___collection___array___AbstractArrayRead___length(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 23;
+  fra.me.line = 24;
   fra.me.meth = LOCATE_standard___collection___array___AbstractArrayRead___length;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:23 */
+  /* ../lib/standard/collection/array.nit:24 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
   }
   REGB0 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
   stack_frame_head = fra.me.prev;
   return REGB0;
 }
+static const char LOCATE_standard___collection___array___AbstractArrayRead___is_empty[] = "array::AbstractArrayRead::(abstract_collection::Collection::is_empty)";
 val_t standard___collection___array___AbstractArrayRead___is_empty(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
@@ -34,9 +37,10 @@ val_t standard___collection___array___AbstractArrayRead___is_empty(val_t p0){
   fra.me.meth = LOCATE_standard___collection___array___AbstractArrayRead___is_empty;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:26 */
+  /* ../lib/standard/collection/array.nit:26 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
@@ -47,9 +51,9 @@ val_t standard___collection___array___AbstractArrayRead___is_empty(val_t p0){
   REGB2 = TAG_Bool(IS_EQUAL_OO(REGB0,REGB1));
   if (UNTAG_Bool(REGB2)) {
   } else {
-    /* ./../lib/standard//kernel.nit:210 */
+    /* ../lib/standard/kernel.nit:230 */
     REGB1 = TAG_Bool((REGB0)==(REGB1));
-    /* ./../lib/standard//collection//array.nit:26 */
+    /* ../lib/standard/collection/array.nit:26 */
     REGB2 = REGB1;
   }
   goto label1;
@@ -57,6 +61,7 @@ val_t standard___collection___array___AbstractArrayRead___is_empty(val_t p0){
   stack_frame_head = fra.me.prev;
   return REGB2;
 }
+static const char LOCATE_standard___collection___array___AbstractArrayRead___has[] = "array::AbstractArrayRead::(abstract_collection::Collection::has)";
 val_t standard___collection___array___AbstractArrayRead___has(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t REGB0;
@@ -70,34 +75,40 @@ val_t standard___collection___array___AbstractArrayRead___has(val_t p0, val_t p1
   fra.me.meth = LOCATE_standard___collection___array___AbstractArrayRead___has;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./../lib/standard//collection//array.nit:30 */
+  /* ../lib/standard/collection/array.nit:30 */
   REGB0 = TAG_Int(0);
-  /* ./../lib/standard//collection//array.nit:23 */
+  /* ../lib/standard/collection/array.nit:24 */
   REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
   }
   REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:32 */
+  /* ../lib/standard/collection/array.nit:32 */
   while(1) {
-    /* ./../lib/standard//kernel.nit:215 */
+    REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+    }
+    /* ../lib/standard/kernel.nit:235 */
     REGB2 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
-    /* ./../lib/standard//collection//array.nit:32 */
+    /* ../lib/standard/collection/array.nit:32 */
     if (UNTAG_Bool(REGB2)) {
-      /* ./../lib/standard//collection//array.nit:33 */
-      fra.me.REG[2] = CALL_standard___collection___abstract_collection___MapRead_____bra(fra.me.REG[0])(fra.me.REG[0], REGB0);
+      /* ../lib/standard/collection/array.nit:33 */
+      fra.me.REG[2] = CALL_standard___collection___abstract_collection___SequenceRead_____bra(fra.me.REG[0])(fra.me.REG[0], REGB0);
       REGB2 = TAG_Bool(IS_EQUAL_NN(fra.me.REG[2],fra.me.REG[1]));
       if (UNTAG_Bool(REGB2)) {
       } else {
         REGB3 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
         if (UNTAG_Bool(REGB3)) {
-          REGB3 = TAG_Bool(false);
+          REGB3 = TAG_Bool(0);
           REGB2 = REGB3;
         } else {
           REGB3 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[1]);
@@ -105,29 +116,30 @@ val_t standard___collection___array___AbstractArrayRead___has(val_t p0, val_t p1
         }
       }
       if (UNTAG_Bool(REGB2)) {
-        REGB2 = TAG_Bool(true);
+        REGB2 = TAG_Bool(1);
         goto label1;
       }
-      /* ./../lib/standard//collection//array.nit:34 */
+      /* ../lib/standard/collection/array.nit:34 */
       REGB3 = TAG_Int(1);
-      /* ./../lib/standard//kernel.nit:218 */
+      /* ../lib/standard/kernel.nit:238 */
       REGB3 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB3));
-      /* ./../lib/standard//collection//array.nit:34 */
+      /* ../lib/standard/collection/array.nit:34 */
       REGB0 = REGB3;
     } else {
-      /* ./../lib/standard//collection//array.nit:32 */
+      /* ../lib/standard/collection/array.nit:32 */
       goto label2;
     }
   }
   label2: while(0);
-  /* ./../lib/standard//collection//array.nit:36 */
-  REGB0 = TAG_Bool(false);
+  /* ../lib/standard/collection/array.nit:36 */
+  REGB0 = TAG_Bool(0);
   REGB2 = REGB0;
   goto label1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
   return REGB2;
 }
+static const char LOCATE_standard___collection___array___AbstractArrayRead___has_only[] = "array::AbstractArrayRead::(abstract_collection::Collection::has_only)";
 val_t standard___collection___array___AbstractArrayRead___has_only(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t REGB0;
@@ -141,34 +153,40 @@ val_t standard___collection___array___AbstractArrayRead___has_only(val_t p0, val
   fra.me.meth = LOCATE_standard___collection___array___AbstractArrayRead___has_only;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./../lib/standard//collection//array.nit:41 */
+  /* ../lib/standard/collection/array.nit:41 */
   REGB0 = TAG_Int(0);
-  /* ./../lib/standard//collection//array.nit:23 */
+  /* ../lib/standard/collection/array.nit:24 */
   REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
   }
   REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:43 */
+  /* ../lib/standard/collection/array.nit:43 */
   while(1) {
-    /* ./../lib/standard//kernel.nit:215 */
+    REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+    }
+    /* ../lib/standard/kernel.nit:235 */
     REGB2 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
-    /* ./../lib/standard//collection//array.nit:43 */
+    /* ../lib/standard/collection/array.nit:43 */
     if (UNTAG_Bool(REGB2)) {
-      /* ./../lib/standard//collection//array.nit:44 */
-      fra.me.REG[2] = CALL_standard___collection___abstract_collection___MapRead_____bra(fra.me.REG[0])(fra.me.REG[0], REGB0);
+      /* ../lib/standard/collection/array.nit:44 */
+      fra.me.REG[2] = CALL_standard___collection___abstract_collection___SequenceRead_____bra(fra.me.REG[0])(fra.me.REG[0], REGB0);
       REGB2 = TAG_Bool(IS_EQUAL_NN(fra.me.REG[2],fra.me.REG[1]));
       if (UNTAG_Bool(REGB2)) {
       } else {
         REGB3 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
         if (UNTAG_Bool(REGB3)) {
-          REGB3 = TAG_Bool(false);
+          REGB3 = TAG_Bool(0);
           REGB2 = REGB3;
         } else {
           REGB3 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[1]);
@@ -177,68 +195,30 @@ val_t standard___collection___array___AbstractArrayRead___has_only(val_t p0, val
       }
       REGB2 = TAG_Bool(!UNTAG_Bool(REGB2));
       if (UNTAG_Bool(REGB2)) {
-        REGB2 = TAG_Bool(false);
+        REGB2 = TAG_Bool(0);
         goto label1;
       }
-      /* ./../lib/standard//collection//array.nit:45 */
+      /* ../lib/standard/collection/array.nit:45 */
       REGB3 = TAG_Int(1);
-      /* ./../lib/standard//kernel.nit:218 */
+      /* ../lib/standard/kernel.nit:238 */
       REGB3 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB3));
-      /* ./../lib/standard//collection//array.nit:45 */
+      /* ../lib/standard/collection/array.nit:45 */
       REGB0 = REGB3;
     } else {
-      /* ./../lib/standard//collection//array.nit:43 */
+      /* ../lib/standard/collection/array.nit:43 */
       goto label2;
     }
   }
   label2: while(0);
-  /* ./../lib/standard//collection//array.nit:47 */
-  REGB0 = TAG_Bool(true);
+  /* ../lib/standard/collection/array.nit:47 */
+  REGB0 = TAG_Bool(1);
   REGB2 = REGB0;
   goto label1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
   return REGB2;
 }
-val_t standard___collection___array___AbstractArrayRead___has_key(val_t p0, val_t p1){
-  struct {struct stack_frame_t me;} fra;
-  val_t REGB0;
-  val_t REGB1;
-  val_t tmp;
-  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
-  fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 50;
-  fra.me.meth = LOCATE_standard___collection___array___AbstractArrayRead___has_key;
-  fra.me.has_broke = 0;
-  fra.me.REG_size = 1;
-  fra.me.REG[0] = NIT_NULL;
-  fra.me.REG[0] = p0;
-  REGB0 = p1;
-  /* ./../lib/standard//collection//array.nit:50 */
-  REGB1 = TAG_Int(0);
-  /* ./../lib/standard//kernel.nit:216 */
-  REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-  /* ./../lib/standard//collection//array.nit:50 */
-  if (UNTAG_Bool(REGB1)) {
-    /* ./../lib/standard//collection//array.nit:23 */
-    REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
-    if (UNTAG_Bool(REGB1)) {
-    } else {
-      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
-    }
-    REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-    /* ./../lib/standard//kernel.nit:215 */
-    REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
-  } else {
-    /* ./../lib/standard//collection//array.nit:50 */
-    REGB0 = TAG_Bool(false);
-    REGB1 = REGB0;
-  }
-  goto label1;
-  label1: while(0);
-  stack_frame_head = fra.me.prev;
-  return REGB1;
-}
+static const char LOCATE_standard___collection___array___AbstractArrayRead___count[] = "array::AbstractArrayRead::(abstract_collection::Collection::count)";
 val_t standard___collection___array___AbstractArrayRead___count(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t REGB0;
@@ -249,40 +229,46 @@ val_t standard___collection___array___AbstractArrayRead___count(val_t p0, val_t
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 52;
+  fra.me.line = 50;
   fra.me.meth = LOCATE_standard___collection___array___AbstractArrayRead___count;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./../lib/standard//collection//array.nit:54 */
+  /* ../lib/standard/collection/array.nit:52 */
   REGB0 = TAG_Int(0);
-  /* ./../lib/standard//collection//array.nit:55 */
+  /* ../lib/standard/collection/array.nit:53 */
   REGB1 = TAG_Int(0);
-  /* ./../lib/standard//collection//array.nit:23 */
+  /* ../lib/standard/collection/array.nit:24 */
   REGB2 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB2)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
   }
   REGB2 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:57 */
+  /* ../lib/standard/collection/array.nit:55 */
   while(1) {
-    /* ./../lib/standard//kernel.nit:215 */
+    REGB3 = TAG_Bool(VAL_ISA(REGB2, VTCOLOR_standard___kernel___Comparable___OTHER(REGB1), VTID_standard___kernel___Comparable___OTHER(REGB1))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB3)) {
+    } else {
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+    }
+    /* ../lib/standard/kernel.nit:235 */
     REGB3 = TAG_Bool(UNTAG_Int(REGB1)<UNTAG_Int(REGB2));
-    /* ./../lib/standard//collection//array.nit:57 */
+    /* ../lib/standard/collection/array.nit:55 */
     if (UNTAG_Bool(REGB3)) {
-      /* ./../lib/standard//collection//array.nit:58 */
-      fra.me.REG[2] = CALL_standard___collection___abstract_collection___MapRead_____bra(fra.me.REG[0])(fra.me.REG[0], REGB1);
+      /* ../lib/standard/collection/array.nit:56 */
+      fra.me.REG[2] = CALL_standard___collection___abstract_collection___SequenceRead_____bra(fra.me.REG[0])(fra.me.REG[0], REGB1);
       REGB3 = TAG_Bool(IS_EQUAL_NN(fra.me.REG[2],fra.me.REG[1]));
       if (UNTAG_Bool(REGB3)) {
       } else {
         REGB4 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
         if (UNTAG_Bool(REGB4)) {
-          REGB4 = TAG_Bool(false);
+          REGB4 = TAG_Bool(0);
           REGB3 = REGB4;
         } else {
           REGB4 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[1]);
@@ -291,44 +277,46 @@ val_t standard___collection___array___AbstractArrayRead___count(val_t p0, val_t
       }
       if (UNTAG_Bool(REGB3)) {
         REGB3 = TAG_Int(1);
-        /* ./../lib/standard//kernel.nit:218 */
+        /* ../lib/standard/kernel.nit:238 */
         REGB3 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB3));
-        /* ./../lib/standard//collection//array.nit:58 */
+        /* ../lib/standard/collection/array.nit:56 */
         REGB0 = REGB3;
       }
-      /* ./../lib/standard//collection//array.nit:59 */
+      /* ../lib/standard/collection/array.nit:57 */
       REGB3 = TAG_Int(1);
-      /* ./../lib/standard//kernel.nit:218 */
+      /* ../lib/standard/kernel.nit:238 */
       REGB3 = TAG_Int(UNTAG_Int(REGB1)+UNTAG_Int(REGB3));
-      /* ./../lib/standard//collection//array.nit:59 */
+      /* ../lib/standard/collection/array.nit:57 */
       REGB1 = REGB3;
     } else {
-      /* ./../lib/standard//collection//array.nit:57 */
+      /* ../lib/standard/collection/array.nit:55 */
       goto label1;
     }
   }
   label1: while(0);
-  /* ./../lib/standard//collection//array.nit:61 */
+  /* ../lib/standard/collection/array.nit:59 */
   goto label2;
   label2: while(0);
   stack_frame_head = fra.me.prev;
   return REGB0;
 }
+static const char LOCATE_standard___collection___array___AbstractArrayRead___index_of[] = "array::AbstractArrayRead::(abstract_collection::SequenceRead::index_of)";
 val_t standard___collection___array___AbstractArrayRead___index_of(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 64;
+  fra.me.line = 62;
   fra.me.meth = LOCATE_standard___collection___array___AbstractArrayRead___index_of;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./../lib/standard//collection//array.nit:64 */
+  /* ../lib/standard/collection/array.nit:62 */
   REGB0 = TAG_Int(0);
   REGB0 = CALL_standard___collection___array___AbstractArrayRead___index_of_from(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1], REGB0);
   goto label1;
@@ -336,6 +324,7 @@ val_t standard___collection___array___AbstractArrayRead___index_of(val_t p0, val
   stack_frame_head = fra.me.prev;
   return REGB0;
 }
+static const char LOCATE_standard___collection___array___AbstractArrayRead___last_index_of[] = "array::AbstractArrayRead::last_index_of";
 val_t standard___collection___array___AbstractArrayRead___last_index_of(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
@@ -343,32 +332,34 @@ val_t standard___collection___array___AbstractArrayRead___last_index_of(val_t p0
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 66;
+  fra.me.line = 64;
   fra.me.meth = LOCATE_standard___collection___array___AbstractArrayRead___last_index_of;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./../lib/standard//collection//array.nit:23 */
+  /* ../lib/standard/collection/array.nit:24 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
   }
   REGB0 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:66 */
+  /* ../lib/standard/collection/array.nit:66 */
   REGB1 = TAG_Int(1);
-  /* ./../lib/standard//kernel.nit:220 */
+  /* ../lib/standard/kernel.nit:240 */
   REGB1 = TAG_Int(UNTAG_Int(REGB0)-UNTAG_Int(REGB1));
-  /* ./../lib/standard//collection//array.nit:66 */
+  /* ../lib/standard/collection/array.nit:66 */
   REGB1 = CALL_standard___collection___array___AbstractArrayRead___last_index_of_from(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1], REGB1);
   goto label1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
   return REGB1;
 }
+static const char LOCATE_standard___collection___array___AbstractArrayRead___index_of_from[] = "array::AbstractArrayRead::index_of_from";
 val_t standard___collection___array___AbstractArrayRead___index_of_from(val_t p0, val_t p1, val_t p2){
   struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t REGB0;
@@ -382,33 +373,39 @@ val_t standard___collection___array___AbstractArrayRead___index_of_from(val_t p0
   fra.me.meth = LOCATE_standard___collection___array___AbstractArrayRead___index_of_from;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
   REGB0 = p2;
-  /* ./../lib/standard//collection//array.nit:23 */
+  /* ../lib/standard/collection/array.nit:24 */
   REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
   }
   REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:72 */
+  /* ../lib/standard/collection/array.nit:74 */
   while(1) {
-    /* ./../lib/standard//kernel.nit:215 */
+    REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+    }
+    /* ../lib/standard/kernel.nit:235 */
     REGB2 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
-    /* ./../lib/standard//collection//array.nit:72 */
+    /* ../lib/standard/collection/array.nit:74 */
     if (UNTAG_Bool(REGB2)) {
-      /* ./../lib/standard//collection//array.nit:73 */
-      fra.me.REG[2] = CALL_standard___collection___abstract_collection___MapRead_____bra(fra.me.REG[0])(fra.me.REG[0], REGB0);
+      /* ../lib/standard/collection/array.nit:75 */
+      fra.me.REG[2] = CALL_standard___collection___abstract_collection___SequenceRead_____bra(fra.me.REG[0])(fra.me.REG[0], REGB0);
       REGB2 = TAG_Bool(IS_EQUAL_NN(fra.me.REG[2],fra.me.REG[1]));
       if (UNTAG_Bool(REGB2)) {
       } else {
         REGB3 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
         if (UNTAG_Bool(REGB3)) {
-          REGB3 = TAG_Bool(false);
+          REGB3 = TAG_Bool(0);
           REGB2 = REGB3;
         } else {
           REGB3 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[1]);
@@ -416,33 +413,34 @@ val_t standard___collection___array___AbstractArrayRead___index_of_from(val_t p0
         }
       }
       if (UNTAG_Bool(REGB2)) {
-        /* ./../lib/standard//collection//array.nit:74 */
+        /* ../lib/standard/collection/array.nit:76 */
         REGB2 = REGB0;
         goto label1;
       }
-      /* ./../lib/standard//collection//array.nit:76 */
+      /* ../lib/standard/collection/array.nit:78 */
       REGB3 = TAG_Int(1);
-      /* ./../lib/standard//kernel.nit:218 */
+      /* ../lib/standard/kernel.nit:238 */
       REGB3 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB3));
-      /* ./../lib/standard//collection//array.nit:76 */
+      /* ../lib/standard/collection/array.nit:78 */
       REGB0 = REGB3;
     } else {
-      /* ./../lib/standard//collection//array.nit:72 */
+      /* ../lib/standard/collection/array.nit:74 */
       goto label2;
     }
   }
   label2: while(0);
-  /* ./../lib/standard//collection//array.nit:78 */
+  /* ../lib/standard/collection/array.nit:80 */
   REGB0 = TAG_Int(1);
-  /* ./../lib/standard//kernel.nit:219 */
+  /* ../lib/standard/kernel.nit:239 */
   REGB0 = TAG_Int(-UNTAG_Int(REGB0));
-  /* ./../lib/standard//collection//array.nit:78 */
+  /* ../lib/standard/collection/array.nit:80 */
   REGB2 = REGB0;
   goto label1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
   return REGB2;
 }
+static const char LOCATE_standard___collection___array___AbstractArrayRead___last_index_of_from[] = "array::AbstractArrayRead::last_index_of_from";
 val_t standard___collection___array___AbstractArrayRead___last_index_of_from(val_t p0, val_t p1, val_t p2){
   struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t REGB0;
@@ -451,31 +449,37 @@ val_t standard___collection___array___AbstractArrayRead___last_index_of_from(val
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 81;
+  fra.me.line = 83;
   fra.me.meth = LOCATE_standard___collection___array___AbstractArrayRead___last_index_of_from;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
   REGB0 = p2;
-  /* ./../lib/standard//collection//array.nit:84 */
+  /* ../lib/standard/collection/array.nit:88 */
   while(1) {
     REGB1 = TAG_Int(0);
-    /* ./../lib/standard//kernel.nit:216 */
+    REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+    }
+    /* ../lib/standard/kernel.nit:236 */
     REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-    /* ./../lib/standard//collection//array.nit:84 */
+    /* ../lib/standard/collection/array.nit:88 */
     if (UNTAG_Bool(REGB1)) {
-      /* ./../lib/standard//collection//array.nit:85 */
-      fra.me.REG[2] = CALL_standard___collection___abstract_collection___MapRead_____bra(fra.me.REG[0])(fra.me.REG[0], REGB0);
+      /* ../lib/standard/collection/array.nit:89 */
+      fra.me.REG[2] = CALL_standard___collection___abstract_collection___SequenceRead_____bra(fra.me.REG[0])(fra.me.REG[0], REGB0);
       REGB1 = TAG_Bool(IS_EQUAL_NN(fra.me.REG[2],fra.me.REG[1]));
       if (UNTAG_Bool(REGB1)) {
       } else {
         REGB2 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
         if (UNTAG_Bool(REGB2)) {
-          REGB2 = TAG_Bool(false);
+          REGB2 = TAG_Bool(0);
           REGB1 = REGB2;
         } else {
           REGB2 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[1]);
@@ -483,86 +487,95 @@ val_t standard___collection___array___AbstractArrayRead___last_index_of_from(val
         }
       }
       if (UNTAG_Bool(REGB1)) {
-        /* ./../lib/standard//collection//array.nit:86 */
+        /* ../lib/standard/collection/array.nit:90 */
         REGB1 = REGB0;
         goto label1;
       } else {
-        /* ./../lib/standard//collection//array.nit:88 */
+        /* ../lib/standard/collection/array.nit:92 */
         REGB2 = TAG_Int(1);
-        /* ./../lib/standard//kernel.nit:220 */
+        /* ../lib/standard/kernel.nit:240 */
         REGB2 = TAG_Int(UNTAG_Int(REGB0)-UNTAG_Int(REGB2));
-        /* ./../lib/standard//collection//array.nit:88 */
+        /* ../lib/standard/collection/array.nit:92 */
         REGB0 = REGB2;
       }
     } else {
-      /* ./../lib/standard//collection//array.nit:84 */
+      /* ../lib/standard/collection/array.nit:88 */
       goto label2;
     }
   }
   label2: while(0);
-  /* ./../lib/standard//collection//array.nit:91 */
+  /* ../lib/standard/collection/array.nit:95 */
   REGB0 = TAG_Int(1);
-  /* ./../lib/standard//kernel.nit:219 */
+  /* ../lib/standard/kernel.nit:239 */
   REGB0 = TAG_Int(-UNTAG_Int(REGB0));
-  /* ./../lib/standard//collection//array.nit:91 */
+  /* ../lib/standard/collection/array.nit:95 */
   REGB1 = REGB0;
   goto label1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
   return REGB1;
 }
+static const char LOCATE_standard___collection___array___AbstractArrayRead___reversed[] = "array::AbstractArrayRead::reversed";
 val_t standard___collection___array___AbstractArrayRead___reversed(val_t p0){
   struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t REGB0;
   val_t REGB1;
+  val_t REGB2;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 94;
+  fra.me.line = 98;
   fra.me.meth = LOCATE_standard___collection___array___AbstractArrayRead___reversed;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:96 */
+  /* ../lib/standard/collection/array.nit:103 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 96);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 103);
   }
   REGB0 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:97 */
+  /* ../lib/standard/collection/array.nit:104 */
   fra.me.REG[1] = NEW_Array_standard___collection___array___Array___with_capacity(REGB0);
-  /* ./../lib/standard//collection//array.nit:98 */
+  /* ../lib/standard/collection/array.nit:105 */
   while(1) {
     REGB1 = TAG_Int(0);
-    /* ./../lib/standard//kernel.nit:217 */
+    REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+    }
+    /* ../lib/standard/kernel.nit:237 */
     REGB1 = TAG_Bool(UNTAG_Int(REGB0)>UNTAG_Int(REGB1));
-    /* ./../lib/standard//collection//array.nit:98 */
+    /* ../lib/standard/collection/array.nit:105 */
     if (UNTAG_Bool(REGB1)) {
-      /* ./../lib/standard//collection//array.nit:99 */
+      /* ../lib/standard/collection/array.nit:106 */
       REGB1 = TAG_Int(1);
-      /* ./../lib/standard//kernel.nit:220 */
+      /* ../lib/standard/kernel.nit:240 */
       REGB1 = TAG_Int(UNTAG_Int(REGB0)-UNTAG_Int(REGB1));
-      /* ./../lib/standard//collection//array.nit:99 */
+      /* ../lib/standard/collection/array.nit:106 */
       REGB0 = REGB1;
-      /* ./../lib/standard//collection//array.nit:100 */
-      fra.me.REG[2] = CALL_standard___collection___abstract_collection___MapRead_____bra(fra.me.REG[0])(fra.me.REG[0], REGB0);
+      /* ../lib/standard/collection/array.nit:107 */
+      fra.me.REG[2] = CALL_standard___collection___abstract_collection___SequenceRead_____bra(fra.me.REG[0])(fra.me.REG[0], REGB0);
       CALL_standard___collection___abstract_collection___SimpleCollection___add(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[2]);
     } else {
-      /* ./../lib/standard//collection//array.nit:98 */
+      /* ../lib/standard/collection/array.nit:105 */
       goto label1;
     }
   }
   label1: while(0);
-  /* ./../lib/standard//collection//array.nit:102 */
+  /* ../lib/standard/collection/array.nit:109 */
   goto label2;
   label2: while(0);
   stack_frame_head = fra.me.prev;
   return fra.me.REG[1];
 }
+static const char LOCATE_standard___collection___array___AbstractArrayRead___copy_to[] = "array::AbstractArrayRead::copy_to";
 void standard___collection___array___AbstractArrayRead___copy_to(val_t p0, val_t p1, val_t p2, val_t p3, val_t p4){
   struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t REGB0;
@@ -573,10 +586,11 @@ void standard___collection___array___AbstractArrayRead___copy_to(val_t p0, val_t
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 105;
+  fra.me.line = 112;
   fra.me.meth = LOCATE_standard___collection___array___AbstractArrayRead___copy_to;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
@@ -585,27 +599,32 @@ void standard___collection___array___AbstractArrayRead___copy_to(val_t p0, val_t
   REGB1 = p2;
   fra.me.REG[1] = p3;
   REGB2 = p4;
-  /* ./../lib/standard//collection//array.nit:109 */
+  /* ../lib/standard/collection/array.nit:122 */
   while(1) {
     REGB3 = TAG_Int(0);
-    /* ./../lib/standard//kernel.nit:217 */
+    REGB4 = TAG_Bool(VAL_ISA(REGB3, VTCOLOR_standard___kernel___Comparable___OTHER(REGB1), VTID_standard___kernel___Comparable___OTHER(REGB1))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB4)) {
+    } else {
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+    }
+    /* ../lib/standard/kernel.nit:237 */
     REGB3 = TAG_Bool(UNTAG_Int(REGB1)>UNTAG_Int(REGB3));
-    /* ./../lib/standard//collection//array.nit:109 */
+    /* ../lib/standard/collection/array.nit:122 */
     if (UNTAG_Bool(REGB3)) {
-      /* ./../lib/standard//collection//array.nit:110 */
+      /* ../lib/standard/collection/array.nit:123 */
       REGB3 = TAG_Int(1);
-      /* ./../lib/standard//kernel.nit:220 */
+      /* ../lib/standard/kernel.nit:240 */
       REGB3 = TAG_Int(UNTAG_Int(REGB1)-UNTAG_Int(REGB3));
-      /* ./../lib/standard//collection//array.nit:110 */
+      /* ../lib/standard/collection/array.nit:123 */
       REGB1 = REGB3;
-      /* ./../lib/standard//kernel.nit:218 */
+      /* ../lib/standard/kernel.nit:238 */
       REGB3 = TAG_Int(UNTAG_Int(REGB2)+UNTAG_Int(REGB1));
       REGB4 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB1));
-      /* ./../lib/standard//collection//array.nit:111 */
-      fra.me.REG[2] = CALL_standard___collection___abstract_collection___MapRead_____bra(fra.me.REG[0])(fra.me.REG[0], REGB4);
-      CALL_standard___collection___abstract_collection___Map_____braeq(fra.me.REG[1])(fra.me.REG[1], REGB3, fra.me.REG[2]);
+      /* ../lib/standard/collection/array.nit:124 */
+      fra.me.REG[2] = CALL_standard___collection___abstract_collection___SequenceRead_____bra(fra.me.REG[0])(fra.me.REG[0], REGB4);
+      CALL_standard___collection___abstract_collection___Sequence_____braeq(fra.me.REG[1])(fra.me.REG[1], REGB3, fra.me.REG[2]);
     } else {
-      /* ./../lib/standard//collection//array.nit:109 */
+      /* ../lib/standard/collection/array.nit:122 */
       goto label1;
     }
   }
@@ -613,6 +632,7 @@ void standard___collection___array___AbstractArrayRead___copy_to(val_t p0, val_t
   stack_frame_head = fra.me.prev;
   return;
 }
+static const char LOCATE_standard___collection___array___AbstractArrayRead___output[] = "array::AbstractArrayRead::(kernel::Object::output)";
 void standard___collection___array___AbstractArrayRead___output(val_t p0){
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
@@ -622,37 +642,43 @@ void standard___collection___array___AbstractArrayRead___output(val_t p0){
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 115;
+  fra.me.line = 128;
   fra.me.meth = LOCATE_standard___collection___array___AbstractArrayRead___output;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:117 */
+  /* ../lib/standard/collection/array.nit:130 */
   REGB0 = TAG_Int(0);
-  /* ./../lib/standard//collection//array.nit:23 */
+  /* ../lib/standard/collection/array.nit:24 */
   REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
   }
   REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:119 */
+  /* ../lib/standard/collection/array.nit:132 */
   while(1) {
-    /* ./../lib/standard//kernel.nit:215 */
+    REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+    }
+    /* ../lib/standard/kernel.nit:235 */
     REGB2 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
-    /* ./../lib/standard//collection//array.nit:119 */
+    /* ../lib/standard/collection/array.nit:132 */
     if (UNTAG_Bool(REGB2)) {
-      /* ./../lib/standard//collection//array.nit:120 */
-      fra.me.REG[1] = CALL_standard___collection___abstract_collection___MapRead_____bra(fra.me.REG[0])(fra.me.REG[0], REGB0);
-      /* ./../lib/standard//collection//array.nit:121 */
+      /* ../lib/standard/collection/array.nit:133 */
+      fra.me.REG[1] = CALL_standard___collection___abstract_collection___SequenceRead_____bra(fra.me.REG[0])(fra.me.REG[0], REGB0);
+      /* ../lib/standard/collection/array.nit:134 */
       REGB2 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
       if (UNTAG_Bool(REGB2)) {
       } else {
         REGB3 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
         if (UNTAG_Bool(REGB3)) {
-          REGB3 = TAG_Bool(false);
+          REGB3 = TAG_Bool(0);
           REGB2 = REGB3;
         } else {
           REGB3 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[1])(fra.me.REG[1], NIT_NULL);
@@ -663,18 +689,18 @@ void standard___collection___array___AbstractArrayRead___output(val_t p0){
       if (UNTAG_Bool(REGB2)) {
         REGB2 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
         if (UNTAG_Bool(REGB2)) {
-          nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 121);
+          nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 134);
         }
         CALL_standard___kernel___Object___output(fra.me.REG[1])(fra.me.REG[1]);
       }
-      /* ./../lib/standard//collection//array.nit:122 */
+      /* ../lib/standard/collection/array.nit:135 */
       REGB2 = TAG_Int(1);
-      /* ./../lib/standard//kernel.nit:218 */
+      /* ../lib/standard/kernel.nit:238 */
       REGB2 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB2));
-      /* ./../lib/standard//collection//array.nit:122 */
+      /* ../lib/standard/collection/array.nit:135 */
       REGB0 = REGB2;
     } else {
-      /* ./../lib/standard//collection//array.nit:119 */
+      /* ../lib/standard/collection/array.nit:132 */
       goto label1;
     }
   }
@@ -682,24 +708,27 @@ void standard___collection___array___AbstractArrayRead___output(val_t p0){
   stack_frame_head = fra.me.prev;
   return;
 }
+static const char LOCATE_standard___collection___array___AbstractArrayRead___iterator[] = "array::AbstractArrayRead::(abstract_collection::Collection::iterator)";
 val_t standard___collection___array___AbstractArrayRead___iterator(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 126;
+  fra.me.line = 139;
   fra.me.meth = LOCATE_standard___collection___array___AbstractArrayRead___iterator;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:126 */
+  /* ../lib/standard/collection/array.nit:139 */
   fra.me.REG[0] = NEW_ArrayIterator_standard___collection___array___ArrayIterator___init(fra.me.REG[0]);
   goto label1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
   return fra.me.REG[0];
 }
+static const char LOCATE_standard___collection___array___AbstractArrayRead_____eqeq[] = "array::AbstractArrayRead::(kernel::Object::==)";
 val_t standard___collection___array___AbstractArrayRead_____eqeq(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[3];} fra;
   val_t REGB0;
@@ -710,84 +739,90 @@ val_t standard___collection___array___AbstractArrayRead_____eqeq(val_t p0, val_t
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 128;
+  fra.me.line = 141;
   fra.me.meth = LOCATE_standard___collection___array___AbstractArrayRead_____eqeq;
   fra.me.has_broke = 0;
   fra.me.REG_size = 4;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[3] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./../lib/standard//collection//array.nit:131 */
-  REGB0 = TAG_Bool((fra.me.REG[1]!=NIT_NULL) && VAL_ISA(fra.me.REG[1], COLOR_standard___collection___array___AbstractArray, ID_standard___collection___array___AbstractArray)) /*cast AbstractArray[E]*/;
+  /* ../lib/standard/collection/array.nit:144 */
+  REGB0 = TAG_Bool((fra.me.REG[1]!=NIT_NULL) && VAL_ISA(fra.me.REG[1], COLOR_standard___collection___array___AbstractArray, ID_standard___collection___array___AbstractArray)) /*cast AbstractArray[nullable Object]*/;
   REGB0 = TAG_Bool(!UNTAG_Bool(REGB0));
   if (UNTAG_Bool(REGB0)) {
-    REGB0 = TAG_Bool(true);
+    REGB0 = TAG_Bool(1);
   } else {
     REGB1 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
     REGB0 = REGB1;
   }
   if (UNTAG_Bool(REGB0)) {
-    REGB0 = TAG_Bool(false);
+    REGB0 = TAG_Bool(0);
     goto label1;
   }
-  /* ./../lib/standard//collection//array.nit:23 */
+  /* ../lib/standard/collection/array.nit:24 */
   REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
   }
   REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:133 */
+  /* ../lib/standard/collection/array.nit:146 */
   REGB2 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
   if (UNTAG_Bool(REGB2)) {
-    nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 133);
+    nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 146);
   }
-  /* ./../lib/standard//collection//array.nit:23 */
+  /* ../lib/standard/collection/array.nit:24 */
   REGB2 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[1])!=NIT_NULL);
   if (UNTAG_Bool(REGB2)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
   }
   REGB2 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[1]);
-  /* ./../lib/standard//collection//array.nit:133 */
+  /* ../lib/standard/collection/array.nit:146 */
   REGB3 = TAG_Bool(IS_EQUAL_OO(REGB2,REGB1));
   if (UNTAG_Bool(REGB3)) {
   } else {
-    /* ./../lib/standard//kernel.nit:210 */
+    /* ../lib/standard/kernel.nit:230 */
     REGB2 = TAG_Bool((REGB2)==(REGB1));
-    /* ./../lib/standard//collection//array.nit:133 */
+    /* ../lib/standard/collection/array.nit:146 */
     REGB3 = REGB2;
   }
   REGB3 = TAG_Bool(!UNTAG_Bool(REGB3));
   if (UNTAG_Bool(REGB3)) {
-    REGB3 = TAG_Bool(false);
+    REGB3 = TAG_Bool(0);
     REGB0 = REGB3;
     goto label1;
   }
-  /* ./../lib/standard//collection//array.nit:134 */
+  /* ../lib/standard/collection/array.nit:147 */
   REGB3 = TAG_Int(0);
-  /* ./../lib/standard//collection//array.nit:135 */
+  /* ../lib/standard/collection/array.nit:148 */
   while(1) {
-    /* ./../lib/standard//kernel.nit:215 */
+    REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB3), VTID_standard___kernel___Comparable___OTHER(REGB3))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+    }
+    /* ../lib/standard/kernel.nit:235 */
     REGB2 = TAG_Bool(UNTAG_Int(REGB3)<UNTAG_Int(REGB1));
-    /* ./../lib/standard//collection//array.nit:135 */
+    /* ../lib/standard/collection/array.nit:148 */
     if (UNTAG_Bool(REGB2)) {
-      /* ./../lib/standard//collection//array.nit:136 */
-      fra.me.REG[2] = CALL_standard___collection___abstract_collection___MapRead_____bra(fra.me.REG[0])(fra.me.REG[0], REGB3);
+      /* ../lib/standard/collection/array.nit:149 */
+      fra.me.REG[2] = CALL_standard___collection___abstract_collection___SequenceRead_____bra(fra.me.REG[0])(fra.me.REG[0], REGB3);
       REGB2 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
       if (UNTAG_Bool(REGB2)) {
-        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 136);
+        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 149);
       }
-      fra.me.REG[3] = CALL_standard___collection___abstract_collection___MapRead_____bra(fra.me.REG[1])(fra.me.REG[1], REGB3);
+      fra.me.REG[3] = CALL_standard___collection___abstract_collection___SequenceRead_____bra(fra.me.REG[1])(fra.me.REG[1], REGB3);
       REGB2 = TAG_Bool(IS_EQUAL_NN(fra.me.REG[2],fra.me.REG[3]));
       if (UNTAG_Bool(REGB2)) {
       } else {
         REGB4 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
         if (UNTAG_Bool(REGB4)) {
-          REGB4 = TAG_Bool(false);
+          REGB4 = TAG_Bool(0);
           REGB2 = REGB4;
         } else {
           REGB4 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[3]);
@@ -796,30 +831,31 @@ val_t standard___collection___array___AbstractArrayRead_____eqeq(val_t p0, val_t
       }
       REGB2 = TAG_Bool(!UNTAG_Bool(REGB2));
       if (UNTAG_Bool(REGB2)) {
-        REGB2 = TAG_Bool(false);
+        REGB2 = TAG_Bool(0);
         REGB0 = REGB2;
         goto label1;
       }
-      /* ./../lib/standard//collection//array.nit:137 */
+      /* ../lib/standard/collection/array.nit:150 */
       REGB2 = TAG_Int(1);
-      /* ./../lib/standard//kernel.nit:218 */
+      /* ../lib/standard/kernel.nit:238 */
       REGB2 = TAG_Int(UNTAG_Int(REGB3)+UNTAG_Int(REGB2));
-      /* ./../lib/standard//collection//array.nit:137 */
+      /* ../lib/standard/collection/array.nit:150 */
       REGB3 = REGB2;
     } else {
-      /* ./../lib/standard//collection//array.nit:135 */
+      /* ../lib/standard/collection/array.nit:148 */
       goto label2;
     }
   }
   label2: while(0);
-  /* ./../lib/standard//collection//array.nit:139 */
-  REGB3 = TAG_Bool(true);
+  /* ../lib/standard/collection/array.nit:152 */
+  REGB3 = TAG_Bool(1);
   REGB0 = REGB3;
   goto label1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
   return REGB0;
 }
+static const char LOCATE_standard___collection___array___AbstractArrayRead___init[] = "array::AbstractArrayRead::init";
 void standard___collection___array___AbstractArrayRead___init(val_t p0, int* init_table){
   int itpos0 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_standard___collection___array___AbstractArrayRead].i;
   struct {struct stack_frame_t me;} fra;
@@ -831,42 +867,48 @@ void standard___collection___array___AbstractArrayRead___init(val_t p0, int* ini
   fra.me.meth = LOCATE_standard___collection___array___AbstractArrayRead___init;
   fra.me.has_broke = 0;
   fra.me.REG_size = 0;
+  fra.me.nitni_local_ref_head = NULL;
   stack_frame_head = fra.me.prev;
   init_table[itpos0] = 1;
   return;
 }
+static const char LOCATE_standard___collection___array___AbstractArray___enlarge[] = "array::AbstractArray::enlarge";
 void standard___collection___array___AbstractArray___enlarge(val_t p0, val_t p1){
   struct {struct stack_frame_t me;} fra;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 147;
+  fra.me.line = 161;
   fra.me.meth = LOCATE_standard___collection___array___AbstractArray___enlarge;
   fra.me.has_broke = 0;
   fra.me.REG_size = 0;
-  /* ./../lib/standard//collection//array.nit:147 */
-  nit_abort("Deferred method called", NULL, LOCATE_standard___collection___array, 147);
+  fra.me.nitni_local_ref_head = NULL;
+  /* ../lib/standard/collection/array.nit:161 */
+  nit_abort("Deferred method called", NULL, LOCATE_standard___collection___array, 161);
   stack_frame_head = fra.me.prev;
   return;
 }
+static const char LOCATE_standard___collection___array___AbstractArray___push[] = "array::AbstractArray::(abstract_collection::Sequence::push)";
 void standard___collection___array___AbstractArray___push(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 149;
+  fra.me.line = 166;
   fra.me.meth = LOCATE_standard___collection___array___AbstractArray___push;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./../lib/standard//collection//array.nit:149 */
+  /* ../lib/standard/collection/array.nit:166 */
   CALL_standard___collection___abstract_collection___SimpleCollection___add(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
   stack_frame_head = fra.me.prev;
   return;
 }
+static const char LOCATE_standard___collection___array___AbstractArray___pop[] = "array::AbstractArray::(abstract_collection::Sequence::pop)";
 val_t standard___collection___array___AbstractArray___pop(val_t p0){
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
@@ -874,35 +916,37 @@ val_t standard___collection___array___AbstractArray___pop(val_t p0){
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 151;
+  fra.me.line = 168;
   fra.me.meth = LOCATE_standard___collection___array___AbstractArray___pop;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:153 */
+  /* ../lib/standard/collection/array.nit:170 */
   REGB0 = CALL_standard___collection___abstract_collection___Collection___is_empty(fra.me.REG[0])(fra.me.REG[0]);
   REGB0 = TAG_Bool(!UNTAG_Bool(REGB0));
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Assert %s  failed", "'not_empty'", LOCATE_standard___collection___array, 153);
+    nit_abort("Assert '%s' failed", "not_empty", LOCATE_standard___collection___array, 170);
   }
-  /* ./../lib/standard//collection//array.nit:154 */
+  /* ../lib/standard/collection/array.nit:171 */
   fra.me.REG[1] = CALL_standard___collection___abstract_collection___SequenceRead___last(fra.me.REG[0])(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:155 */
+  /* ../lib/standard/collection/array.nit:172 */
   REGB0 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
   REGB1 = TAG_Int(1);
-  /* ./../lib/standard//kernel.nit:220 */
+  /* ../lib/standard/kernel.nit:240 */
   REGB1 = TAG_Int(UNTAG_Int(REGB0)-UNTAG_Int(REGB1));
-  /* ./../lib/standard//collection//array.nit:155 */
+  /* ../lib/standard/collection/array.nit:172 */
   ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]) = REGB1;
-  /* ./../lib/standard//collection//array.nit:156 */
+  /* ../lib/standard/collection/array.nit:173 */
   goto label1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
   return fra.me.REG[1];
 }
+static const char LOCATE_standard___collection___array___AbstractArray___shift[] = "array::AbstractArray::(abstract_collection::Sequence::shift)";
 val_t standard___collection___array___AbstractArray___shift(val_t p0){
   struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t REGB0;
@@ -911,128 +955,143 @@ val_t standard___collection___array___AbstractArray___shift(val_t p0){
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 159;
+  fra.me.line = 176;
   fra.me.meth = LOCATE_standard___collection___array___AbstractArray___shift;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:161 */
+  /* ../lib/standard/collection/array.nit:178 */
   REGB0 = CALL_standard___collection___abstract_collection___Collection___is_empty(fra.me.REG[0])(fra.me.REG[0]);
   REGB0 = TAG_Bool(!UNTAG_Bool(REGB0));
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Assert %s  failed", "'not_empty'", LOCATE_standard___collection___array, 161);
+    nit_abort("Assert '%s' failed", "not_empty", LOCATE_standard___collection___array, 178);
   }
-  /* ./../lib/standard//collection//array.nit:162 */
+  /* ../lib/standard/collection/array.nit:179 */
   fra.me.REG[1] = CALL_standard___collection___abstract_collection___Collection___first(fra.me.REG[0])(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:163 */
+  /* ../lib/standard/collection/array.nit:180 */
   REGB0 = TAG_Int(1);
-  /* ./../lib/standard//collection//array.nit:23 */
+  /* ../lib/standard/collection/array.nit:24 */
   REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
   }
   REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:165 */
+  /* ../lib/standard/collection/array.nit:182 */
   while(1) {
-    /* ./../lib/standard//kernel.nit:215 */
+    REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+    }
+    /* ../lib/standard/kernel.nit:235 */
     REGB2 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
-    /* ./../lib/standard//collection//array.nit:165 */
+    /* ../lib/standard/collection/array.nit:182 */
     if (UNTAG_Bool(REGB2)) {
-      /* ./../lib/standard//collection//array.nit:166 */
+      /* ../lib/standard/collection/array.nit:183 */
       REGB2 = TAG_Int(1);
-      /* ./../lib/standard//kernel.nit:220 */
+      /* ../lib/standard/kernel.nit:240 */
       REGB2 = TAG_Int(UNTAG_Int(REGB0)-UNTAG_Int(REGB2));
-      /* ./../lib/standard//collection//array.nit:166 */
-      fra.me.REG[2] = CALL_standard___collection___abstract_collection___MapRead_____bra(fra.me.REG[0])(fra.me.REG[0], REGB0);
-      CALL_standard___collection___abstract_collection___Map_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB2, fra.me.REG[2]);
-      /* ./../lib/standard//collection//array.nit:167 */
+      /* ../lib/standard/collection/array.nit:183 */
+      fra.me.REG[2] = CALL_standard___collection___abstract_collection___SequenceRead_____bra(fra.me.REG[0])(fra.me.REG[0], REGB0);
+      CALL_standard___collection___abstract_collection___Sequence_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB2, fra.me.REG[2]);
+      /* ../lib/standard/collection/array.nit:184 */
       REGB2 = TAG_Int(1);
-      /* ./../lib/standard//kernel.nit:218 */
+      /* ../lib/standard/kernel.nit:238 */
       REGB2 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB2));
-      /* ./../lib/standard//collection//array.nit:167 */
+      /* ../lib/standard/collection/array.nit:184 */
       REGB0 = REGB2;
     } else {
-      /* ./../lib/standard//collection//array.nit:165 */
+      /* ../lib/standard/collection/array.nit:182 */
       goto label1;
     }
   }
   label1: while(0);
-  /* ./../lib/standard//collection//array.nit:169 */
+  /* ../lib/standard/collection/array.nit:186 */
   REGB0 = TAG_Int(1);
-  /* ./../lib/standard//kernel.nit:220 */
+  /* ../lib/standard/kernel.nit:240 */
   REGB0 = TAG_Int(UNTAG_Int(REGB1)-UNTAG_Int(REGB0));
-  /* ./../lib/standard//collection//array.nit:169 */
+  /* ../lib/standard/collection/array.nit:186 */
   ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]) = REGB0;
-  /* ./../lib/standard//collection//array.nit:170 */
+  /* ../lib/standard/collection/array.nit:187 */
   goto label2;
   label2: while(0);
   stack_frame_head = fra.me.prev;
   return fra.me.REG[1];
 }
+static const char LOCATE_standard___collection___array___AbstractArray___unshift[] = "array::AbstractArray::(abstract_collection::Sequence::unshift)";
 void standard___collection___array___AbstractArray___unshift(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t REGB0;
   val_t REGB1;
+  val_t REGB2;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 173;
+  fra.me.line = 190;
   fra.me.meth = LOCATE_standard___collection___array___AbstractArray___unshift;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./../lib/standard//collection//array.nit:23 */
+  /* ../lib/standard/collection/array.nit:24 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
   }
   REGB0 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:175 */
+  /* ../lib/standard/collection/array.nit:192 */
   REGB1 = TAG_Int(1);
-  /* ./../lib/standard//kernel.nit:220 */
+  /* ../lib/standard/kernel.nit:240 */
   REGB1 = TAG_Int(UNTAG_Int(REGB0)-UNTAG_Int(REGB1));
-  /* ./../lib/standard//collection//array.nit:176 */
+  /* ../lib/standard/collection/array.nit:193 */
   while(1) {
     REGB0 = TAG_Int(0);
-    /* ./../lib/standard//kernel.nit:217 */
+    REGB2 = TAG_Bool(VAL_ISA(REGB0, VTCOLOR_standard___kernel___Comparable___OTHER(REGB1), VTID_standard___kernel___Comparable___OTHER(REGB1))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+    }
+    /* ../lib/standard/kernel.nit:237 */
     REGB0 = TAG_Bool(UNTAG_Int(REGB1)>UNTAG_Int(REGB0));
-    /* ./../lib/standard//collection//array.nit:176 */
+    /* ../lib/standard/collection/array.nit:193 */
     if (UNTAG_Bool(REGB0)) {
-      /* ./../lib/standard//collection//array.nit:177 */
+      /* ../lib/standard/collection/array.nit:194 */
       REGB0 = TAG_Int(1);
-      /* ./../lib/standard//kernel.nit:218 */
+      /* ../lib/standard/kernel.nit:238 */
       REGB0 = TAG_Int(UNTAG_Int(REGB1)+UNTAG_Int(REGB0));
-      /* ./../lib/standard//collection//array.nit:177 */
-      fra.me.REG[2] = CALL_standard___collection___abstract_collection___MapRead_____bra(fra.me.REG[0])(fra.me.REG[0], REGB1);
-      CALL_standard___collection___abstract_collection___Map_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB0, fra.me.REG[2]);
-      /* ./../lib/standard//collection//array.nit:178 */
+      /* ../lib/standard/collection/array.nit:194 */
+      fra.me.REG[2] = CALL_standard___collection___abstract_collection___SequenceRead_____bra(fra.me.REG[0])(fra.me.REG[0], REGB1);
+      CALL_standard___collection___abstract_collection___Sequence_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB0, fra.me.REG[2]);
+      /* ../lib/standard/collection/array.nit:195 */
       REGB0 = TAG_Int(1);
-      /* ./../lib/standard//kernel.nit:220 */
+      /* ../lib/standard/kernel.nit:240 */
       REGB0 = TAG_Int(UNTAG_Int(REGB1)-UNTAG_Int(REGB0));
-      /* ./../lib/standard//collection//array.nit:178 */
+      /* ../lib/standard/collection/array.nit:195 */
       REGB1 = REGB0;
     } else {
-      /* ./../lib/standard//collection//array.nit:176 */
+      /* ../lib/standard/collection/array.nit:193 */
       goto label1;
     }
   }
   label1: while(0);
-  /* ./../lib/standard//collection//array.nit:180 */
+  /* ../lib/standard/collection/array.nit:197 */
   REGB1 = TAG_Int(0);
-  CALL_standard___collection___abstract_collection___Map_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB1, fra.me.REG[1]);
+  CALL_standard___collection___abstract_collection___Sequence_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB1, fra.me.REG[1]);
   stack_frame_head = fra.me.prev;
   return;
 }
+static const char LOCATE_standard___collection___array___AbstractArray___insert[] = "array::AbstractArray::insert";
 void standard___collection___array___AbstractArray___insert(val_t p0, val_t p1, val_t p2){
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
@@ -1041,143 +1100,158 @@ void standard___collection___array___AbstractArray___insert(val_t p0, val_t p1,
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 183;
+  fra.me.line = 200;
   fra.me.meth = LOCATE_standard___collection___array___AbstractArray___insert;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
   REGB0 = p2;
-  /* ./../lib/standard//collection//array.nit:23 */
+  /* ../lib/standard/collection/array.nit:24 */
   REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
   }
   REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:185 */
+  /* ../lib/standard/collection/array.nit:207 */
   REGB2 = TAG_Int(1);
-  /* ./../lib/standard//kernel.nit:218 */
+  /* ../lib/standard/kernel.nit:238 */
   REGB2 = TAG_Int(UNTAG_Int(REGB1)+UNTAG_Int(REGB2));
-  /* ./../lib/standard//collection//array.nit:185 */
+  /* ../lib/standard/collection/array.nit:207 */
   CALL_standard___collection___array___AbstractArray___enlarge(fra.me.REG[0])(fra.me.REG[0], REGB2);
-  /* ./../lib/standard//collection//array.nit:23 */
+  /* ../lib/standard/collection/array.nit:24 */
   REGB2 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB2)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
   }
   REGB2 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-  /* ./../lib/standard//kernel.nit:220 */
+  /* ../lib/standard/kernel.nit:240 */
   REGB2 = TAG_Int(UNTAG_Int(REGB2)-UNTAG_Int(REGB0));
-  /* ./../lib/standard//collection//array.nit:186 */
+  /* ../lib/standard/collection/array.nit:208 */
   REGB1 = TAG_Int(1);
-  /* ./../lib/standard//kernel.nit:218 */
+  /* ../lib/standard/kernel.nit:238 */
   REGB1 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB1));
-  /* ./../lib/standard//collection//array.nit:186 */
+  /* ../lib/standard/collection/array.nit:208 */
   CALL_standard___collection___array___AbstractArrayRead___copy_to(fra.me.REG[0])(fra.me.REG[0], REGB0, REGB2, fra.me.REG[0], REGB1);
-  /* ./../lib/standard//collection//array.nit:187 */
-  CALL_standard___collection___abstract_collection___Map_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB0, fra.me.REG[1]);
+  /* ../lib/standard/collection/array.nit:209 */
+  CALL_standard___collection___abstract_collection___Sequence_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB0, fra.me.REG[1]);
   stack_frame_head = fra.me.prev;
   return;
 }
+static const char LOCATE_standard___collection___array___AbstractArray___add[] = "array::AbstractArray::(abstract_collection::SimpleCollection::add)";
 void standard___collection___array___AbstractArray___add(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 190;
+  fra.me.line = 212;
   fra.me.meth = LOCATE_standard___collection___array___AbstractArray___add;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./../lib/standard//collection//array.nit:23 */
+  /* ../lib/standard/collection/array.nit:24 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
   }
   REGB0 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:190 */
-  CALL_standard___collection___abstract_collection___Map_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB0, fra.me.REG[1]);
+  /* ../lib/standard/collection/array.nit:212 */
+  CALL_standard___collection___abstract_collection___Sequence_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB0, fra.me.REG[1]);
   stack_frame_head = fra.me.prev;
   return;
 }
+static const char LOCATE_standard___collection___array___AbstractArray___clear[] = "array::AbstractArray::(abstract_collection::RemovableCollection::clear)";
 void standard___collection___array___AbstractArray___clear(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 192;
+  fra.me.line = 214;
   fra.me.meth = LOCATE_standard___collection___array___AbstractArray___clear;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:192 */
+  /* ../lib/standard/collection/array.nit:214 */
   REGB0 = TAG_Int(0);
   ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]) = REGB0;
   stack_frame_head = fra.me.prev;
   return;
 }
+static const char LOCATE_standard___collection___array___AbstractArray___remove[] = "array::AbstractArray::(abstract_collection::RemovableCollection::remove)";
 void standard___collection___array___AbstractArray___remove(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 194;
+  fra.me.line = 216;
   fra.me.meth = LOCATE_standard___collection___array___AbstractArray___remove;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./../lib/standard//collection//array.nit:194 */
+  /* ../lib/standard/collection/array.nit:216 */
   REGB0 = CALL_standard___collection___abstract_collection___SequenceRead___index_of(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
-  CALL_standard___collection___abstract_collection___Map___remove_at(fra.me.REG[0])(fra.me.REG[0], REGB0);
+  CALL_standard___collection___abstract_collection___Sequence___remove_at(fra.me.REG[0])(fra.me.REG[0], REGB0);
   stack_frame_head = fra.me.prev;
   return;
 }
+static const char LOCATE_standard___collection___array___AbstractArray___remove_all[] = "array::AbstractArray::(abstract_collection::RemovableCollection::remove_all)";
 void standard___collection___array___AbstractArray___remove_all(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
   val_t REGB1;
+  val_t REGB2;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 196;
+  fra.me.line = 218;
   fra.me.meth = LOCATE_standard___collection___array___AbstractArray___remove_all;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./../lib/standard//collection//array.nit:198 */
+  /* ../lib/standard/collection/array.nit:220 */
   REGB0 = CALL_standard___collection___abstract_collection___SequenceRead___index_of(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
-  /* ./../lib/standard//collection//array.nit:199 */
+  /* ../lib/standard/collection/array.nit:221 */
   while(1) {
     REGB1 = TAG_Int(0);
-    /* ./../lib/standard//kernel.nit:216 */
+    REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+    }
+    /* ../lib/standard/kernel.nit:236 */
     REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-    /* ./../lib/standard//collection//array.nit:199 */
+    /* ../lib/standard/collection/array.nit:221 */
     if (UNTAG_Bool(REGB1)) {
-      /* ./../lib/standard//collection//array.nit:200 */
-      CALL_standard___collection___abstract_collection___Map___remove_at(fra.me.REG[0])(fra.me.REG[0], REGB0);
-      /* ./../lib/standard//collection//array.nit:201 */
+      /* ../lib/standard/collection/array.nit:222 */
+      CALL_standard___collection___abstract_collection___Sequence___remove_at(fra.me.REG[0])(fra.me.REG[0], REGB0);
+      /* ../lib/standard/collection/array.nit:223 */
       REGB1 = CALL_standard___collection___array___AbstractArrayRead___index_of_from(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1], REGB0);
       REGB0 = REGB1;
     } else {
-      /* ./../lib/standard//collection//array.nit:199 */
+      /* ../lib/standard/collection/array.nit:221 */
       goto label1;
     }
   }
@@ -1185,6 +1259,7 @@ void standard___collection___array___AbstractArray___remove_all(val_t p0, val_t
   stack_frame_head = fra.me.prev;
   return;
 }
+static const char LOCATE_standard___collection___array___AbstractArray___remove_at[] = "array::AbstractArray::(abstract_collection::Sequence::remove_at)";
 void standard___collection___array___AbstractArray___remove_at(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
@@ -1194,86 +1269,132 @@ void standard___collection___array___AbstractArray___remove_at(val_t p0, val_t p
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 205;
+  fra.me.line = 227;
   fra.me.meth = LOCATE_standard___collection___array___AbstractArray___remove_at;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   REGB0 = p1;
-  /* ./../lib/standard//collection//array.nit:23 */
+  /* ../lib/standard/collection/array.nit:24 */
   REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
   }
   REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:208 */
+  /* ../lib/standard/collection/array.nit:230 */
   REGB2 = TAG_Int(0);
-  /* ./../lib/standard//kernel.nit:216 */
+  REGB3 = TAG_Bool(VAL_ISA(REGB2, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+  if (UNTAG_Bool(REGB3)) {
+  } else {
+    nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+  }
+  /* ../lib/standard/kernel.nit:236 */
   REGB2 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB2));
-  /* ./../lib/standard//collection//array.nit:208 */
+  /* ../lib/standard/collection/array.nit:230 */
   if (UNTAG_Bool(REGB2)) {
-    /* ./../lib/standard//kernel.nit:215 */
+    REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+    }
+    /* ../lib/standard/kernel.nit:235 */
     REGB2 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
   } else {
-    /* ./../lib/standard//collection//array.nit:208 */
-    REGB3 = TAG_Bool(false);
+    /* ../lib/standard/collection/array.nit:230 */
+    REGB3 = TAG_Bool(0);
     REGB2 = REGB3;
   }
   if (UNTAG_Bool(REGB2)) {
-    /* ./../lib/standard//collection//array.nit:209 */
+    /* ../lib/standard/collection/array.nit:231 */
     REGB2 = TAG_Int(1);
-    /* ./../lib/standard//kernel.nit:218 */
+    /* ../lib/standard/kernel.nit:238 */
     REGB2 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB2));
-    /* ./../lib/standard//collection//array.nit:210 */
+    /* ../lib/standard/collection/array.nit:232 */
     while(1) {
-      /* ./../lib/standard//kernel.nit:215 */
+      REGB0 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB2), VTID_standard___kernel___Comparable___OTHER(REGB2))) /*cast OTHER*/;
+      if (UNTAG_Bool(REGB0)) {
+      } else {
+        nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+      }
+      /* ../lib/standard/kernel.nit:235 */
       REGB0 = TAG_Bool(UNTAG_Int(REGB2)<UNTAG_Int(REGB1));
-      /* ./../lib/standard//collection//array.nit:210 */
+      /* ../lib/standard/collection/array.nit:232 */
       if (UNTAG_Bool(REGB0)) {
-        /* ./../lib/standard//collection//array.nit:211 */
+        /* ../lib/standard/collection/array.nit:233 */
         REGB0 = TAG_Int(1);
-        /* ./../lib/standard//kernel.nit:220 */
+        /* ../lib/standard/kernel.nit:240 */
         REGB0 = TAG_Int(UNTAG_Int(REGB2)-UNTAG_Int(REGB0));
-        /* ./../lib/standard//collection//array.nit:211 */
-        fra.me.REG[1] = CALL_standard___collection___abstract_collection___MapRead_____bra(fra.me.REG[0])(fra.me.REG[0], REGB2);
-        CALL_standard___collection___abstract_collection___Map_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB0, fra.me.REG[1]);
-        /* ./../lib/standard//collection//array.nit:212 */
+        /* ../lib/standard/collection/array.nit:233 */
+        fra.me.REG[1] = CALL_standard___collection___abstract_collection___SequenceRead_____bra(fra.me.REG[0])(fra.me.REG[0], REGB2);
+        CALL_standard___collection___abstract_collection___Sequence_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB0, fra.me.REG[1]);
+        /* ../lib/standard/collection/array.nit:234 */
         REGB0 = TAG_Int(1);
-        /* ./../lib/standard//kernel.nit:218 */
+        /* ../lib/standard/kernel.nit:238 */
         REGB0 = TAG_Int(UNTAG_Int(REGB2)+UNTAG_Int(REGB0));
-        /* ./../lib/standard//collection//array.nit:212 */
+        /* ../lib/standard/collection/array.nit:234 */
         REGB2 = REGB0;
       } else {
-        /* ./../lib/standard//collection//array.nit:210 */
+        /* ../lib/standard/collection/array.nit:232 */
         goto label1;
       }
     }
     label1: while(0);
-    /* ./../lib/standard//collection//array.nit:214 */
+    /* ../lib/standard/collection/array.nit:236 */
     REGB2 = TAG_Int(1);
-    /* ./../lib/standard//kernel.nit:220 */
+    /* ../lib/standard/kernel.nit:240 */
     REGB2 = TAG_Int(UNTAG_Int(REGB1)-UNTAG_Int(REGB2));
-    /* ./../lib/standard//collection//array.nit:214 */
+    /* ../lib/standard/collection/array.nit:236 */
     ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]) = REGB2;
   }
   stack_frame_head = fra.me.prev;
   return;
 }
+static const char LOCATE_standard___collection___array___AbstractArray___swap_at[] = "array::AbstractArray::swap_at";
+void standard___collection___array___AbstractArray___swap_at(val_t p0, val_t p1, val_t p2){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_standard___collection___array;
+  fra.me.line = 240;
+  fra.me.meth = LOCATE_standard___collection___array___AbstractArray___swap_at;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  REGB0 = p1;
+  REGB1 = p2;
+  /* ../lib/standard/collection/array.nit:247 */
+  fra.me.REG[1] = CALL_standard___collection___abstract_collection___SequenceRead_____bra(fra.me.REG[0])(fra.me.REG[0], REGB0);
+  /* ../lib/standard/collection/array.nit:248 */
+  CALL_standard___collection___abstract_collection___Sequence_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB0, REGB1);
+  /* ../lib/standard/collection/array.nit:249 */
+  CALL_standard___collection___abstract_collection___Sequence_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB1, fra.me.REG[1]);
+  stack_frame_head = fra.me.prev;
+  return;
+}
+static const char LOCATE_standard___collection___array___Array___iterate[] = "array::Array::(abstract_collection::Collection::iterate)";
 void standard___collection___array___Array___iterate(val_t p0, struct stack_frame_t *closctx_param, fun_t clos_fun0){
   struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t REGB0;
   val_t REGB1;
+  val_t REGB2;
   fun_t CREG[1];
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 231;
+  fra.me.line = 266;
   fra.me.meth = LOCATE_standard___collection___array___Array___iterate;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
@@ -1281,50 +1402,55 @@ void standard___collection___array___Array___iterate(val_t p0, struct stack_fram
   fra.me.closure_funs = CREG;
   fra.me.REG[0] = p0;
   CREG[0] = clos_fun0;
-  /* ./../lib/standard//collection//array.nit:234 */
+  /* ../lib/standard/collection/array.nit:269 */
   REGB0 = TAG_Int(0);
-  /* ./../lib/standard//collection//array.nit:235 */
+  /* ../lib/standard/collection/array.nit:270 */
   REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 235);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 270);
   }
   REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:236 */
+  /* ../lib/standard/collection/array.nit:271 */
   fra.me.REG[1] = ATTR_standard___collection___array___Array____items(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:237 */
+  /* ../lib/standard/collection/array.nit:272 */
   while(1) {
-    /* ./../lib/standard//collection//array.nit:23 */
+    /* ../lib/standard/collection/array.nit:24 */
     REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
     if (UNTAG_Bool(REGB1)) {
     } else {
-      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
     }
     REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-    /* ./../lib/standard//kernel.nit:215 */
+    REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+    }
+    /* ../lib/standard/kernel.nit:235 */
     REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
-    /* ./../lib/standard//collection//array.nit:237 */
+    /* ../lib/standard/collection/array.nit:272 */
     if (UNTAG_Bool(REGB1)) {
-      /* ./../lib/standard//collection//array.nit:238 */
+      /* ../lib/standard/collection/array.nit:273 */
       REGB1 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
       if (UNTAG_Bool(REGB1)) {
-        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 238);
+        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 273);
       }
-      /* ./../lib/standard//collection//array.nit:654 */
+      /* ../lib/standard/collection/array.nit:724 */
       fra.me.REG[2] = ((Nit_NativeArray)fra.me.REG[1])->val[UNTAG_Int(REGB0)];
-      /* ./../lib/standard//collection//array.nit:238 */
+      /* ../lib/standard/collection/array.nit:273 */
       ((void (*)(struct stack_frame_t *, val_t))(CREG[0]))(closctx_param, fra.me.REG[2]);
       if (closctx_param->has_broke) {
         goto label1;
       }
-      /* ./../lib/standard//collection//array.nit:239 */
+      /* ../lib/standard/collection/array.nit:274 */
       REGB1 = TAG_Int(1);
-      /* ./../lib/standard//kernel.nit:218 */
+      /* ../lib/standard/kernel.nit:238 */
       REGB1 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB1));
-      /* ./../lib/standard//collection//array.nit:239 */
+      /* ../lib/standard/collection/array.nit:274 */
       REGB0 = REGB1;
     } else {
-      /* ./../lib/standard//collection//array.nit:237 */
+      /* ../lib/standard/collection/array.nit:272 */
       goto label2;
     }
   }
@@ -1333,6 +1459,7 @@ void standard___collection___array___Array___iterate(val_t p0, struct stack_fram
   stack_frame_head = fra.me.prev;
   return;
 }
+static const char LOCATE_standard___collection___array___Array_____bra[] = "array::Array::(abstract_collection::SequenceRead::[])";
 val_t standard___collection___array___Array_____bra(val_t p0, val_t p1){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
@@ -1341,50 +1468,62 @@ val_t standard___collection___array___Array_____bra(val_t p0, val_t p1){
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 243;
+  fra.me.line = 278;
   fra.me.meth = LOCATE_standard___collection___array___Array_____bra;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
   REGB0 = p1;
-  /* ./../lib/standard//collection//array.nit:245 */
+  /* ../lib/standard/collection/array.nit:280 */
   REGB1 = TAG_Int(0);
-  /* ./../lib/standard//kernel.nit:216 */
+  REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+  if (UNTAG_Bool(REGB2)) {
+  } else {
+    nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+  }
+  /* ../lib/standard/kernel.nit:236 */
   REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-  /* ./../lib/standard//collection//array.nit:245 */
+  /* ../lib/standard/collection/array.nit:280 */
   if (UNTAG_Bool(REGB1)) {
     REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
     if (UNTAG_Bool(REGB1)) {
     } else {
-      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 245);
+      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 280);
     }
     REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-    /* ./../lib/standard//kernel.nit:215 */
+    REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+    }
+    /* ../lib/standard/kernel.nit:235 */
     REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
   } else {
-    /* ./../lib/standard//collection//array.nit:245 */
-    REGB2 = TAG_Bool(false);
+    /* ../lib/standard/collection/array.nit:280 */
+    REGB2 = TAG_Bool(0);
     REGB1 = REGB2;
   }
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Assert %s  failed", "'index'", LOCATE_standard___collection___array, 245);
+    nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
   }
-  /* ./../lib/standard//collection//array.nit:246 */
+  /* ../lib/standard/collection/array.nit:281 */
   fra.me.REG[0] = ATTR_standard___collection___array___Array____items(fra.me.REG[0]);
   REGB1 = TAG_Bool(fra.me.REG[0]==NIT_NULL);
   if (UNTAG_Bool(REGB1)) {
-    nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 246);
+    nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 281);
   }
-  /* ./../lib/standard//collection//array.nit:654 */
+  /* ../lib/standard/collection/array.nit:724 */
   fra.me.REG[0] = ((Nit_NativeArray)fra.me.REG[0])->val[UNTAG_Int(REGB0)];
-  /* ./../lib/standard//collection//array.nit:246 */
+  /* ../lib/standard/collection/array.nit:281 */
   goto label1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
   return fra.me.REG[0];
 }
+static const char LOCATE_standard___collection___array___Array_____braeq[] = "array::Array::(abstract_collection::Sequence::[]=)";
 void standard___collection___array___Array_____braeq(val_t p0, val_t p1, val_t p2){
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
@@ -1393,145 +1532,175 @@ void standard___collection___array___Array_____braeq(val_t p0, val_t p1, val_t p
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 249;
+  fra.me.line = 284;
   fra.me.meth = LOCATE_standard___collection___array___Array_____braeq;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   REGB0 = p1;
   fra.me.REG[1] = p2;
-  /* ./../lib/standard//collection//array.nit:251 */
+  /* ../lib/standard/collection/array.nit:286 */
   REGB1 = TAG_Int(0);
-  /* ./../lib/standard//kernel.nit:216 */
+  REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+  if (UNTAG_Bool(REGB2)) {
+  } else {
+    nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+  }
+  /* ../lib/standard/kernel.nit:236 */
   REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-  /* ./../lib/standard//collection//array.nit:251 */
+  /* ../lib/standard/collection/array.nit:286 */
   if (UNTAG_Bool(REGB1)) {
     REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
     if (UNTAG_Bool(REGB1)) {
     } else {
-      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 251);
+      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 286);
     }
     REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
     REGB2 = TAG_Int(1);
-    /* ./../lib/standard//kernel.nit:218 */
+    /* ../lib/standard/kernel.nit:238 */
     REGB2 = TAG_Int(UNTAG_Int(REGB1)+UNTAG_Int(REGB2));
-    /* ./../lib/standard//kernel.nit:215 */
+    REGB1 = TAG_Bool(VAL_ISA(REGB2, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB1)) {
+    } else {
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+    }
+    /* ../lib/standard/kernel.nit:235 */
     REGB2 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB2));
   } else {
-    /* ./../lib/standard//collection//array.nit:251 */
-    REGB1 = TAG_Bool(false);
+    /* ../lib/standard/collection/array.nit:286 */
+    REGB1 = TAG_Bool(0);
     REGB2 = REGB1;
   }
   if (UNTAG_Bool(REGB2)) {
   } else {
-    nit_abort("Assert %s  failed", "'index'", LOCATE_standard___collection___array, 251);
+    nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 286);
   }
-  /* ./../lib/standard//collection//array.nit:252 */
+  /* ../lib/standard/collection/array.nit:287 */
   REGB2 = TAG_Bool(ATTR_standard___collection___array___Array____capacity(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB2)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_capacity", LOCATE_standard___collection___array, 252);
+    nit_abort("Uninitialized attribute %s", "_capacity", LOCATE_standard___collection___array, 287);
   }
   REGB2 = ATTR_standard___collection___array___Array____capacity(fra.me.REG[0]);
-  /* ./../lib/standard//kernel.nit:214 */
+  REGB1 = TAG_Bool(VAL_ISA(REGB0, VTCOLOR_standard___kernel___Comparable___OTHER(REGB2), VTID_standard___kernel___Comparable___OTHER(REGB2))) /*cast OTHER*/;
+  if (UNTAG_Bool(REGB1)) {
+  } else {
+    nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+  }
+  /* ../lib/standard/kernel.nit:234 */
   REGB2 = TAG_Bool(UNTAG_Int(REGB2)<=UNTAG_Int(REGB0));
-  /* ./../lib/standard//collection//array.nit:252 */
+  /* ../lib/standard/collection/array.nit:287 */
   if (UNTAG_Bool(REGB2)) {
-    /* ./../lib/standard//collection//array.nit:253 */
+    /* ../lib/standard/collection/array.nit:288 */
     REGB2 = TAG_Int(1);
-    /* ./../lib/standard//kernel.nit:218 */
+    /* ../lib/standard/kernel.nit:238 */
     REGB2 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB2));
-    /* ./../lib/standard//collection//array.nit:253 */
+    /* ../lib/standard/collection/array.nit:288 */
     CALL_standard___collection___array___AbstractArray___enlarge(fra.me.REG[0])(fra.me.REG[0], REGB2);
   }
-  /* ./../lib/standard//collection//array.nit:255 */
+  /* ../lib/standard/collection/array.nit:290 */
   REGB2 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB2)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 255);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 290);
   }
   REGB2 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-  /* ./../lib/standard//kernel.nit:214 */
+  REGB1 = TAG_Bool(VAL_ISA(REGB0, VTCOLOR_standard___kernel___Comparable___OTHER(REGB2), VTID_standard___kernel___Comparable___OTHER(REGB2))) /*cast OTHER*/;
+  if (UNTAG_Bool(REGB1)) {
+  } else {
+    nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+  }
+  /* ../lib/standard/kernel.nit:234 */
   REGB2 = TAG_Bool(UNTAG_Int(REGB2)<=UNTAG_Int(REGB0));
-  /* ./../lib/standard//collection//array.nit:255 */
+  /* ../lib/standard/collection/array.nit:290 */
   if (UNTAG_Bool(REGB2)) {
-    /* ./../lib/standard//collection//array.nit:256 */
+    /* ../lib/standard/collection/array.nit:291 */
     REGB2 = TAG_Int(1);
-    /* ./../lib/standard//kernel.nit:218 */
+    /* ../lib/standard/kernel.nit:238 */
     REGB2 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB2));
-    /* ./../lib/standard//collection//array.nit:256 */
+    /* ../lib/standard/collection/array.nit:291 */
     ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]) = REGB2;
   }
-  /* ./../lib/standard//collection//array.nit:258 */
+  /* ../lib/standard/collection/array.nit:293 */
   fra.me.REG[0] = ATTR_standard___collection___array___Array____items(fra.me.REG[0]);
   REGB2 = TAG_Bool(fra.me.REG[0]==NIT_NULL);
   if (UNTAG_Bool(REGB2)) {
-    nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 258);
+    nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 293);
   }
-  /* ./../lib/standard//collection//array.nit:655 */
+  /* ../lib/standard/collection/array.nit:725 */
   ((Nit_NativeArray)fra.me.REG[0])->val[UNTAG_Int(REGB0)]=fra.me.REG[1];
   stack_frame_head = fra.me.prev;
   return;
 }
+static const char LOCATE_standard___collection___array___Array___add[] = "array::Array::(abstract_collection::SimpleCollection::add)";
 void standard___collection___array___Array___add(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
   val_t REGB1;
+  val_t REGB2;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 261;
+  fra.me.line = 296;
   fra.me.meth = LOCATE_standard___collection___array___Array___add;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./../lib/standard//collection//array.nit:263 */
+  /* ../lib/standard/collection/array.nit:298 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 263);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 298);
   }
   REGB0 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:264 */
+  /* ../lib/standard/collection/array.nit:299 */
   REGB1 = TAG_Bool(ATTR_standard___collection___array___Array____capacity(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_capacity", LOCATE_standard___collection___array, 264);
+    nit_abort("Uninitialized attribute %s", "_capacity", LOCATE_standard___collection___array, 299);
   }
   REGB1 = ATTR_standard___collection___array___Array____capacity(fra.me.REG[0]);
-  /* ./../lib/standard//kernel.nit:214 */
+  REGB2 = TAG_Bool(VAL_ISA(REGB0, VTCOLOR_standard___kernel___Comparable___OTHER(REGB1), VTID_standard___kernel___Comparable___OTHER(REGB1))) /*cast OTHER*/;
+  if (UNTAG_Bool(REGB2)) {
+  } else {
+    nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+  }
+  /* ../lib/standard/kernel.nit:234 */
   REGB1 = TAG_Bool(UNTAG_Int(REGB1)<=UNTAG_Int(REGB0));
-  /* ./../lib/standard//collection//array.nit:264 */
+  /* ../lib/standard/collection/array.nit:299 */
   if (UNTAG_Bool(REGB1)) {
-    /* ./../lib/standard//collection//array.nit:265 */
+    /* ../lib/standard/collection/array.nit:300 */
     REGB1 = TAG_Int(1);
-    /* ./../lib/standard//kernel.nit:218 */
+    /* ../lib/standard/kernel.nit:238 */
     REGB1 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB1));
-    /* ./../lib/standard//collection//array.nit:265 */
+    /* ../lib/standard/collection/array.nit:300 */
     CALL_standard___collection___array___AbstractArray___enlarge(fra.me.REG[0])(fra.me.REG[0], REGB1);
   }
-  /* ./../lib/standard//collection//array.nit:267 */
+  /* ../lib/standard/collection/array.nit:302 */
   REGB1 = TAG_Int(1);
-  /* ./../lib/standard//kernel.nit:218 */
+  /* ../lib/standard/kernel.nit:238 */
   REGB1 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB1));
-  /* ./../lib/standard//collection//array.nit:267 */
+  /* ../lib/standard/collection/array.nit:302 */
   ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]) = REGB1;
-  /* ./../lib/standard//collection//array.nit:268 */
+  /* ../lib/standard/collection/array.nit:303 */
   fra.me.REG[0] = ATTR_standard___collection___array___Array____items(fra.me.REG[0]);
   REGB1 = TAG_Bool(fra.me.REG[0]==NIT_NULL);
   if (UNTAG_Bool(REGB1)) {
-    nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 268);
+    nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 303);
   }
-  /* ./../lib/standard//collection//array.nit:655 */
+  /* ../lib/standard/collection/array.nit:725 */
   ((Nit_NativeArray)fra.me.REG[0])->val[UNTAG_Int(REGB0)]=fra.me.REG[1];
   stack_frame_head = fra.me.prev;
   return;
 }
+static const char LOCATE_standard___collection___array___Array___enlarge[] = "array::Array::(array::AbstractArray::enlarge)";
 void standard___collection___array___Array___enlarge(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t REGB0;
@@ -1541,84 +1710,101 @@ void standard___collection___array___Array___enlarge(val_t p0, val_t p1){
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 271;
+  fra.me.line = 306;
   fra.me.meth = LOCATE_standard___collection___array___Array___enlarge;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   REGB0 = p1;
-  /* ./../lib/standard//collection//array.nit:273 */
+  /* ../lib/standard/collection/array.nit:308 */
   REGB1 = TAG_Bool(ATTR_standard___collection___array___Array____capacity(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_capacity", LOCATE_standard___collection___array, 273);
+    nit_abort("Uninitialized attribute %s", "_capacity", LOCATE_standard___collection___array, 308);
   }
   REGB1 = ATTR_standard___collection___array___Array____capacity(fra.me.REG[0]);
-  /* ./../lib/standard//kernel.nit:214 */
+  REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+  if (UNTAG_Bool(REGB2)) {
+  } else {
+    nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+  }
+  /* ../lib/standard/kernel.nit:234 */
   REGB2 = TAG_Bool(UNTAG_Int(REGB0)<=UNTAG_Int(REGB1));
-  /* ./../lib/standard//collection//array.nit:274 */
+  /* ../lib/standard/collection/array.nit:309 */
   if (UNTAG_Bool(REGB2)) {
     goto label1;
   }
-  /* ./../lib/standard//collection//array.nit:275 */
+  /* ../lib/standard/collection/array.nit:310 */
   while(1) {
-    /* ./../lib/standard//kernel.nit:214 */
+    REGB2 = TAG_Bool(VAL_ISA(REGB0, VTCOLOR_standard___kernel___Comparable___OTHER(REGB1), VTID_standard___kernel___Comparable___OTHER(REGB1))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+    }
+    /* ../lib/standard/kernel.nit:234 */
     REGB2 = TAG_Bool(UNTAG_Int(REGB1)<=UNTAG_Int(REGB0));
-    /* ./../lib/standard//collection//array.nit:275 */
+    /* ../lib/standard/collection/array.nit:310 */
     if (UNTAG_Bool(REGB2)) {
       REGB2 = TAG_Int(2);
-      /* ./../lib/standard//kernel.nit:221 */
+      /* ../lib/standard/kernel.nit:241 */
       REGB2 = TAG_Int(UNTAG_Int(REGB1)*UNTAG_Int(REGB2));
-      /* ./../lib/standard//collection//array.nit:275 */
+      /* ../lib/standard/collection/array.nit:310 */
       REGB3 = TAG_Int(2);
-      /* ./../lib/standard//kernel.nit:218 */
+      /* ../lib/standard/kernel.nit:238 */
       REGB3 = TAG_Int(UNTAG_Int(REGB2)+UNTAG_Int(REGB3));
-      /* ./../lib/standard//collection//array.nit:275 */
+      /* ../lib/standard/collection/array.nit:310 */
       REGB1 = REGB3;
     } else {
       goto label2;
     }
   }
   label2: while(0);
-  /* ./../lib/standard//collection//array.nit:648 */
+  /* ../lib/standard/collection/array.nit:718 */
   fra.me.REG[1] = NEW_NativeArray(UNTAG_Int(REGB1), sizeof(val_t));
-  /* ./../lib/standard//collection//array.nit:277 */
+  /* ../lib/standard/collection/array.nit:312 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___Array____capacity(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_capacity", LOCATE_standard___collection___array, 277);
+    nit_abort("Uninitialized attribute %s", "_capacity", LOCATE_standard___collection___array, 312);
   }
   REGB0 = ATTR_standard___collection___array___Array____capacity(fra.me.REG[0]);
   REGB3 = TAG_Int(0);
-  /* ./../lib/standard//kernel.nit:217 */
+  REGB2 = TAG_Bool(VAL_ISA(REGB3, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+  if (UNTAG_Bool(REGB2)) {
+  } else {
+    nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+  }
+  /* ../lib/standard/kernel.nit:237 */
   REGB3 = TAG_Bool(UNTAG_Int(REGB0)>UNTAG_Int(REGB3));
-  /* ./../lib/standard//collection//array.nit:277 */
+  /* ../lib/standard/collection/array.nit:312 */
   if (UNTAG_Bool(REGB3)) {
     fra.me.REG[2] = ATTR_standard___collection___array___Array____items(fra.me.REG[0]);
     REGB3 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
     if (UNTAG_Bool(REGB3)) {
     } else {
-      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 277);
+      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 312);
     }
     REGB3 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
     REGB0 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
     if (UNTAG_Bool(REGB0)) {
-      nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 277);
+      nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 312);
     }
-    /* ./../lib/standard//collection//array.nit:656 */
+    /* ../lib/standard/collection/array.nit:726 */
     (void)memcpy(((Nit_NativeArray )fra.me.REG[1])->val, ((Nit_NativeArray)fra.me.REG[2])->val, UNTAG_Int(REGB3)*sizeof(val_t));
   }
-  /* ./../lib/standard//collection//array.nit:278 */
+  /* ../lib/standard/collection/array.nit:313 */
   ATTR_standard___collection___array___Array____items(fra.me.REG[0]) = fra.me.REG[1];
-  /* ./../lib/standard//collection//array.nit:279 */
+  /* ../lib/standard/collection/array.nit:314 */
   ATTR_standard___collection___array___Array____capacity(fra.me.REG[0]) = REGB1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
   return;
 }
+static const char LOCATE_standard___collection___array___Array___init[] = "array::Array::init";
 void standard___collection___array___Array___init(val_t p0, int* init_table){
   int itpos1 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_standard___collection___array___Array].i;
   struct {struct stack_frame_t me;} fra;
@@ -1627,232 +1813,297 @@ void standard___collection___array___Array___init(val_t p0, int* init_table){
   if (init_table[itpos1]) return;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 282;
+  fra.me.line = 317;
   fra.me.meth = LOCATE_standard___collection___array___Array___init;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:285 */
+  /* ../lib/standard/collection/array.nit:320 */
   REGB0 = TAG_Int(0);
   ATTR_standard___collection___array___Array____capacity(fra.me.REG[0]) = REGB0;
-  /* ./../lib/standard//collection//array.nit:286 */
+  /* ../lib/standard/collection/array.nit:321 */
   REGB0 = TAG_Int(0);
   ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]) = REGB0;
   stack_frame_head = fra.me.prev;
   init_table[itpos1] = 1;
   return;
 }
-void standard___collection___array___Array___with_items(val_t p0, val_t p1, int* init_table){
+static const char LOCATE_standard___collection___array___Array___from[] = "array::Array::from";
+void standard___collection___array___Array___from(val_t p0, val_t p1, int* init_table){
   int itpos2 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_standard___collection___array___Array].i;
-  struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
   val_t tmp;
   if (init_table[itpos2]) return;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 289;
+  fra.me.line = 324;
+  fra.me.meth = LOCATE_standard___collection___array___Array___from;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ../lib/standard/collection/array.nit:326 */
+  REGB0 = CALL_standard___collection___abstract_collection___Collection___length(fra.me.REG[1])(fra.me.REG[1]);
+  CALL_standard___collection___array___Array___with_capacity(fra.me.REG[0])(fra.me.REG[0], REGB0, init_table);
+  /* ../lib/standard/collection/array.nit:327 */
+  CALL_standard___collection___abstract_collection___SimpleCollection___add_all(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+  stack_frame_head = fra.me.prev;
+  init_table[itpos2] = 1;
+  return;
+}
+static const char LOCATE_standard___collection___array___Array___with_items[] = "array::Array::with_items";
+void standard___collection___array___Array___with_items(val_t p0, val_t p1, int* init_table){
+  int itpos3 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_standard___collection___array___Array].i;
+  struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
+  val_t REGB0;
+  val_t tmp;
+  if (init_table[itpos3]) return;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_standard___collection___array;
+  fra.me.line = 330;
   fra.me.meth = LOCATE_standard___collection___array___Array___with_items;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./../lib/standard//collection//array.nit:289 */
+  /* ../lib/standard/collection/array.nit:330 */
+  fra.me.REG[2] = fra.me.REG[0];
   REGB0 = TAG_Bool((fra.me.REG[1]!=NIT_NULL) && VAL_ISA(fra.me.REG[1], COLOR_standard___collection___array___Array, ID_standard___collection___array___Array)) /*cast Array[E]*/;
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Cast failed", NULL, LOCATE_standard___collection___array, 289);
+    nit_abort("Cast failed", NULL, LOCATE_standard___collection___array, 330);
   }
-  /* ./../lib/standard//collection//array.nit:292 */
-  fra.me.REG[2] = ATTR_standard___collection___array___Array____items(fra.me.REG[1]);
-  ATTR_standard___collection___array___Array____items(fra.me.REG[0]) = fra.me.REG[2];
-  /* ./../lib/standard//collection//array.nit:293 */
+  /* ../lib/standard/collection/array.nit:333 */
+  fra.me.REG[0] = ATTR_standard___collection___array___Array____items(fra.me.REG[1]);
+  ATTR_standard___collection___array___Array____items(fra.me.REG[2]) = fra.me.REG[0];
+  /* ../lib/standard/collection/array.nit:334 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___Array____capacity(fra.me.REG[1])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_capacity", LOCATE_standard___collection___array, 293);
+    nit_abort("Uninitialized attribute %s", "_capacity", LOCATE_standard___collection___array, 334);
   }
   REGB0 = ATTR_standard___collection___array___Array____capacity(fra.me.REG[1]);
-  ATTR_standard___collection___array___Array____capacity(fra.me.REG[0]) = REGB0;
-  /* ./../lib/standard//collection//array.nit:23 */
+  ATTR_standard___collection___array___Array____capacity(fra.me.REG[2]) = REGB0;
+  /* ../lib/standard/collection/array.nit:24 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[1])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
   }
   REGB0 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[1]);
-  /* ./../lib/standard//collection//array.nit:294 */
-  ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]) = REGB0;
+  /* ../lib/standard/collection/array.nit:335 */
+  ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]) = REGB0;
   stack_frame_head = fra.me.prev;
-  init_table[itpos2] = 1;
+  init_table[itpos3] = 1;
   return;
 }
+static const char LOCATE_standard___collection___array___Array___with_capacity[] = "array::Array::with_capacity";
 void standard___collection___array___Array___with_capacity(val_t p0, val_t p1, int* init_table){
-  int itpos3 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_standard___collection___array___Array].i;
+  int itpos4 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_standard___collection___array___Array].i;
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
   val_t REGB1;
+  val_t REGB2;
   val_t tmp;
-  if (init_table[itpos3]) return;
+  if (init_table[itpos4]) return;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 297;
+  fra.me.line = 338;
   fra.me.meth = LOCATE_standard___collection___array___Array___with_capacity;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   REGB0 = p1;
-  /* ./../lib/standard//collection//array.nit:300 */
+  /* ../lib/standard/collection/array.nit:341 */
   REGB1 = TAG_Int(0);
-  /* ./../lib/standard//kernel.nit:216 */
+  REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+  if (UNTAG_Bool(REGB2)) {
+  } else {
+    nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+  }
+  /* ../lib/standard/kernel.nit:236 */
   REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-  /* ./../lib/standard//collection//array.nit:300 */
+  /* ../lib/standard/collection/array.nit:341 */
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Assert %s  failed", "'positive'", LOCATE_standard___collection___array, 300);
+    nit_abort("Assert '%s' failed", "positive", LOCATE_standard___collection___array, 341);
   }
-  /* ./../lib/standard//collection//array.nit:648 */
+  /* ../lib/standard/collection/array.nit:718 */
   fra.me.REG[1] = NEW_NativeArray(UNTAG_Int(REGB0), sizeof(val_t));
-  /* ./../lib/standard//collection//array.nit:301 */
+  /* ../lib/standard/collection/array.nit:342 */
   ATTR_standard___collection___array___Array____items(fra.me.REG[0]) = fra.me.REG[1];
-  /* ./../lib/standard//collection//array.nit:302 */
+  /* ../lib/standard/collection/array.nit:343 */
   ATTR_standard___collection___array___Array____capacity(fra.me.REG[0]) = REGB0;
-  /* ./../lib/standard//collection//array.nit:303 */
+  /* ../lib/standard/collection/array.nit:344 */
   REGB0 = TAG_Int(0);
   ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]) = REGB0;
   stack_frame_head = fra.me.prev;
-  init_table[itpos3] = 1;
+  init_table[itpos4] = 1;
   return;
 }
+static const char LOCATE_standard___collection___array___Array___filled_with[] = "array::Array::filled_with";
 void standard___collection___array___Array___filled_with(val_t p0, val_t p1, val_t p2, int* init_table){
-  int itpos4 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_standard___collection___array___Array].i;
+  int itpos5 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_standard___collection___array___Array].i;
   struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t REGB0;
   val_t REGB1;
   val_t REGB2;
   val_t tmp;
-  if (init_table[itpos4]) return;
+  if (init_table[itpos5]) return;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 306;
+  fra.me.line = 347;
   fra.me.meth = LOCATE_standard___collection___array___Array___filled_with;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
   REGB0 = p2;
-  /* ./../lib/standard//collection//array.nit:309 */
+  /* ../lib/standard/collection/array.nit:350 */
   REGB1 = TAG_Int(0);
-  /* ./../lib/standard//kernel.nit:216 */
+  REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+  if (UNTAG_Bool(REGB2)) {
+  } else {
+    nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+  }
+  /* ../lib/standard/kernel.nit:236 */
   REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-  /* ./../lib/standard//collection//array.nit:309 */
+  /* ../lib/standard/collection/array.nit:350 */
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Assert %s  failed", "'positive'", LOCATE_standard___collection___array, 309);
+    nit_abort("Assert '%s' failed", "positive", LOCATE_standard___collection___array, 350);
   }
-  /* ./../lib/standard//collection//array.nit:648 */
+  /* ../lib/standard/collection/array.nit:718 */
   fra.me.REG[2] = NEW_NativeArray(UNTAG_Int(REGB0), sizeof(val_t));
-  /* ./../lib/standard//collection//array.nit:310 */
+  /* ../lib/standard/collection/array.nit:351 */
   ATTR_standard___collection___array___Array____items(fra.me.REG[0]) = fra.me.REG[2];
-  /* ./../lib/standard//collection//array.nit:311 */
+  /* ../lib/standard/collection/array.nit:352 */
   ATTR_standard___collection___array___Array____capacity(fra.me.REG[0]) = REGB0;
-  /* ./../lib/standard//collection//array.nit:312 */
+  /* ../lib/standard/collection/array.nit:353 */
   ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]) = REGB0;
-  /* ./../lib/standard//collection//array.nit:313 */
+  /* ../lib/standard/collection/array.nit:354 */
   REGB1 = TAG_Int(0);
-  /* ./../lib/standard//collection//array.nit:314 */
+  /* ../lib/standard/collection/array.nit:355 */
   while(1) {
-    /* ./../lib/standard//kernel.nit:215 */
+    REGB2 = TAG_Bool(VAL_ISA(REGB0, VTCOLOR_standard___kernel___Comparable___OTHER(REGB1), VTID_standard___kernel___Comparable___OTHER(REGB1))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+    }
+    /* ../lib/standard/kernel.nit:235 */
     REGB2 = TAG_Bool(UNTAG_Int(REGB1)<UNTAG_Int(REGB0));
-    /* ./../lib/standard//collection//array.nit:314 */
+    /* ../lib/standard/collection/array.nit:355 */
     if (UNTAG_Bool(REGB2)) {
-      /* ./../lib/standard//collection//array.nit:315 */
-      CALL_standard___collection___abstract_collection___Map_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB1, fra.me.REG[1]);
-      /* ./../lib/standard//collection//array.nit:316 */
+      /* ../lib/standard/collection/array.nit:356 */
+      CALL_standard___collection___abstract_collection___Sequence_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB1, fra.me.REG[1]);
+      /* ../lib/standard/collection/array.nit:357 */
       REGB2 = TAG_Int(1);
-      /* ./../lib/standard//kernel.nit:218 */
+      /* ../lib/standard/kernel.nit:238 */
       REGB2 = TAG_Int(UNTAG_Int(REGB1)+UNTAG_Int(REGB2));
-      /* ./../lib/standard//collection//array.nit:316 */
+      /* ../lib/standard/collection/array.nit:357 */
       REGB1 = REGB2;
     } else {
-      /* ./../lib/standard//collection//array.nit:314 */
+      /* ../lib/standard/collection/array.nit:355 */
       goto label1;
     }
   }
   label1: while(0);
   stack_frame_head = fra.me.prev;
-  init_table[itpos4] = 1;
+  init_table[itpos5] = 1;
   return;
 }
+static const char LOCATE_standard___collection___array___Array___with_native[] = "array::Array::with_native";
 void standard___collection___array___Array___with_native(val_t p0, val_t p1, val_t p2, int* init_table){
-  int itpos5 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_standard___collection___array___Array].i;
+  int itpos6 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_standard___collection___array___Array].i;
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
   val_t REGB1;
+  val_t REGB2;
   val_t tmp;
-  if (init_table[itpos5]) return;
+  if (init_table[itpos6]) return;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 320;
+  fra.me.line = 361;
   fra.me.meth = LOCATE_standard___collection___array___Array___with_native;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
   REGB0 = p2;
-  /* ./../lib/standard//collection//array.nit:323 */
+  /* ../lib/standard/collection/array.nit:364 */
   REGB1 = TAG_Int(0);
-  /* ./../lib/standard//kernel.nit:216 */
+  REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+  if (UNTAG_Bool(REGB2)) {
+  } else {
+    nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+  }
+  /* ../lib/standard/kernel.nit:236 */
   REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-  /* ./../lib/standard//collection//array.nit:323 */
+  /* ../lib/standard/collection/array.nit:364 */
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Assert %s  failed", "'positive'", LOCATE_standard___collection___array, 323);
+    nit_abort("Assert '%s' failed", "positive", LOCATE_standard___collection___array, 364);
   }
-  /* ./../lib/standard//collection//array.nit:324 */
+  /* ../lib/standard/collection/array.nit:365 */
   ATTR_standard___collection___array___Array____items(fra.me.REG[0]) = fra.me.REG[1];
-  /* ./../lib/standard//collection//array.nit:325 */
+  /* ../lib/standard/collection/array.nit:366 */
   ATTR_standard___collection___array___Array____capacity(fra.me.REG[0]) = REGB0;
-  /* ./../lib/standard//collection//array.nit:326 */
+  /* ../lib/standard/collection/array.nit:367 */
   ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]) = REGB0;
   stack_frame_head = fra.me.prev;
-  init_table[itpos5] = 1;
+  init_table[itpos6] = 1;
   return;
 }
+static const char LOCATE_standard___collection___array___Array___intern_items[] = "array::Array::intern_items";
 val_t standard___collection___array___Array___intern_items(val_t p0){
-  struct {struct stack_frame_t me;} fra;
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 332;
+  fra.me.line = 373;
   fra.me.meth = LOCATE_standard___collection___array___Array___intern_items;
   fra.me.has_broke = 0;
-  fra.me.REG_size = 1;
+  fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:334 */
-  fra.me.REG[0] = ATTR_standard___collection___array___Array____items(fra.me.REG[0]);
-  REGB0 = TAG_Bool(fra.me.REG[0]!=NIT_NULL);
+  /* ../lib/standard/collection/array.nit:373 */
+  fra.me.REG[1] = fra.me.REG[0];
+  /* ../lib/standard/collection/array.nit:375 */
+  fra.me.REG[1] = ATTR_standard___collection___array___Array____items(fra.me.REG[1]);
+  REGB0 = TAG_Bool(fra.me.REG[1]!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Cast failed", NULL, LOCATE_standard___collection___array, 334);
+    nit_abort("Cast failed", NULL, LOCATE_standard___collection___array, 375);
   }
   goto label1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
-  return fra.me.REG[0];
+  return fra.me.REG[1];
 }
+static const char LOCATE_standard___collection___array___Array___sort[] = "array::Array::sort";
 void standard___collection___array___Array___sort(val_t p0, struct stack_frame_t *closctx_param, fun_t clos_fun0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
@@ -1862,27 +2113,28 @@ void standard___collection___array___Array___sort(val_t p0, struct stack_frame_t
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 339;
+  fra.me.line = 380;
   fra.me.meth = LOCATE_standard___collection___array___Array___sort;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.closure_ctx = closctx_param;
   fra.me.closure_funs = CREG;
   fra.me.REG[0] = p0;
   CREG[0] = clos_fun0;
-  /* ./../lib/standard//collection//array.nit:343 */
+  /* ../lib/standard/collection/array.nit:384 */
   REGB0 = TAG_Int(0);
-  /* ./../lib/standard//collection//array.nit:23 */
+  /* ../lib/standard/collection/array.nit:24 */
   REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
   }
   REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:343 */
+  /* ../lib/standard/collection/array.nit:384 */
   REGB2 = TAG_Int(1);
-  /* ./../lib/standard//kernel.nit:220 */
+  /* ../lib/standard/kernel.nit:240 */
   REGB2 = TAG_Int(UNTAG_Int(REGB1)-UNTAG_Int(REGB2));
   CALL_standard___collection___array___Array___sub_sort(fra.me.REG[0])(fra.me.REG[0], REGB0, REGB2, (&(fra.me)), ((fun_t)OC_standard___collection___array___Array___sort_1));
   switch ((&(fra.me))->has_broke) {
@@ -1897,13 +2149,14 @@ void standard___collection___array___Array___sort(val_t p0, struct stack_frame_t
     struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
     val_t REGB0;
     val_t tmp;
-    /* ./../lib/standard//collection//array.nit:343 */
+    /* ../lib/standard/collection/array.nit:384 */
     fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
     fra.me.file = LOCATE_standard___collection___array;
-    fra.me.line = 343;
+    fra.me.line = 384;
     fra.me.meth = LOCATE_standard___collection___array___Array___sort;
     fra.me.has_broke = 0;
     fra.me.REG_size = 2;
+    fra.me.nitni_local_ref_head = NULL;
     fra.me.REG[0] = NIT_NULL;
     fra.me.REG[1] = NIT_NULL;
     fra.me.REG[0] = p0;
@@ -1918,6 +2171,7 @@ void standard___collection___array___Array___sort(val_t p0, struct stack_frame_t
     stack_frame_head = fra.me.prev;
     return REGB0;
   }
+static const char LOCATE_standard___collection___array___Array___sub_sort[] = "array::Array::sub_sort";
 void standard___collection___array___Array___sub_sort(val_t p0, val_t p1, val_t p2, struct stack_frame_t *closctx_param, fun_t clos_fun0){
   struct {struct stack_frame_t me; val_t MORE_REG[3];} fra;
   val_t REGB0;
@@ -1931,10 +2185,11 @@ void standard___collection___array___Array___sub_sort(val_t p0, val_t p1, val_t
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 346;
+  fra.me.line = 387;
   fra.me.meth = LOCATE_standard___collection___array___Array___sub_sort;
   fra.me.has_broke = 0;
   fra.me.REG_size = 4;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
@@ -1945,342 +2200,442 @@ void standard___collection___array___Array___sub_sort(val_t p0, val_t p1, val_t
   REGB0 = p1;
   REGB1 = p2;
   CREG[0] = clos_fun0;
-  /* ./../lib/standard//kernel.nit:216 */
+  REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+  if (UNTAG_Bool(REGB2)) {
+  } else {
+    nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+  }
+  /* ../lib/standard/kernel.nit:236 */
   REGB2 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-  /* ./../lib/standard//collection//array.nit:350 */
+  /* ../lib/standard/collection/array.nit:391 */
   if (UNTAG_Bool(REGB2)) {
-    /* ./../lib/standard//collection//array.nit:351 */
+    /* ../lib/standard/collection/array.nit:392 */
     goto label1;
   } else {
-    /* ./../lib/standard//collection//array.nit:352 */
+    /* ../lib/standard/collection/array.nit:393 */
     REGB2 = TAG_Int(7);
-    /* ./../lib/standard//kernel.nit:218 */
+    /* ../lib/standard/kernel.nit:238 */
     REGB2 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB2));
-    /* ./../lib/standard//kernel.nit:215 */
+    REGB3 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB2), VTID_standard___kernel___Comparable___OTHER(REGB2))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB3)) {
+    } else {
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+    }
+    /* ../lib/standard/kernel.nit:235 */
     REGB2 = TAG_Bool(UNTAG_Int(REGB2)<UNTAG_Int(REGB1));
-    /* ./../lib/standard//collection//array.nit:352 */
+    /* ../lib/standard/collection/array.nit:393 */
     if (UNTAG_Bool(REGB2)) {
-      /* ./../lib/standard//collection//array.nit:243 */
+      /* ../lib/standard/collection/array.nit:278 */
       fra.me.REG[1] = fra.me.REG[0];
       REGB2 = REGB0;
-      /* ./../lib/standard//collection//array.nit:245 */
+      /* ../lib/standard/collection/array.nit:280 */
       REGB3 = TAG_Int(0);
-      /* ./../lib/standard//kernel.nit:216 */
+      REGB4 = TAG_Bool(VAL_ISA(REGB3, VTCOLOR_standard___kernel___Comparable___OTHER(REGB2), VTID_standard___kernel___Comparable___OTHER(REGB2))) /*cast OTHER*/;
+      if (UNTAG_Bool(REGB4)) {
+      } else {
+        nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+      }
+      /* ../lib/standard/kernel.nit:236 */
       REGB3 = TAG_Bool(UNTAG_Int(REGB2)>=UNTAG_Int(REGB3));
-      /* ./../lib/standard//collection//array.nit:245 */
+      /* ../lib/standard/collection/array.nit:280 */
       if (UNTAG_Bool(REGB3)) {
         REGB3 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[1])!=NIT_NULL);
         if (UNTAG_Bool(REGB3)) {
         } else {
-          nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 245);
+          nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 280);
         }
         REGB3 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[1]);
-        /* ./../lib/standard//kernel.nit:215 */
+        REGB4 = TAG_Bool(VAL_ISA(REGB3, VTCOLOR_standard___kernel___Comparable___OTHER(REGB2), VTID_standard___kernel___Comparable___OTHER(REGB2))) /*cast OTHER*/;
+        if (UNTAG_Bool(REGB4)) {
+        } else {
+          nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+        }
+        /* ../lib/standard/kernel.nit:235 */
         REGB3 = TAG_Bool(UNTAG_Int(REGB2)<UNTAG_Int(REGB3));
       } else {
-        /* ./../lib/standard//collection//array.nit:245 */
-        REGB4 = TAG_Bool(false);
+        /* ../lib/standard/collection/array.nit:280 */
+        REGB4 = TAG_Bool(0);
         REGB3 = REGB4;
       }
       if (UNTAG_Bool(REGB3)) {
       } else {
-        nit_abort("Assert %s  failed", "'index'", LOCATE_standard___collection___array, 245);
+        nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
       }
-      /* ./../lib/standard//collection//array.nit:246 */
+      /* ../lib/standard/collection/array.nit:281 */
       fra.me.REG[1] = ATTR_standard___collection___array___Array____items(fra.me.REG[1]);
       REGB3 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
       if (UNTAG_Bool(REGB3)) {
-        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 246);
+        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 281);
       }
-      /* ./../lib/standard//collection//array.nit:654 */
+      /* ../lib/standard/collection/array.nit:724 */
       fra.me.REG[1] = ((Nit_NativeArray)fra.me.REG[1])->val[UNTAG_Int(REGB2)];
-      /* ./../lib/standard//collection//array.nit:246 */
+      /* ../lib/standard/collection/array.nit:281 */
       goto label2;
       label2: while(0);
-      /* ./../lib/standard//collection//array.nit:354 */
+      /* ../lib/standard/collection/array.nit:395 */
       REGB2 = REGB0;
-      /* ./../lib/standard//collection//array.nit:355 */
+      /* ../lib/standard/collection/array.nit:396 */
       REGB3 = REGB1;
-      /* ./../lib/standard//collection//array.nit:356 */
+      /* ../lib/standard/collection/array.nit:397 */
       while(1) {
-        /* ./../lib/standard//kernel.nit:217 */
+        REGB4 = TAG_Bool(VAL_ISA(REGB2, VTCOLOR_standard___kernel___Comparable___OTHER(REGB3), VTID_standard___kernel___Comparable___OTHER(REGB3))) /*cast OTHER*/;
+        if (UNTAG_Bool(REGB4)) {
+        } else {
+          nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+        }
+        /* ../lib/standard/kernel.nit:237 */
         REGB4 = TAG_Bool(UNTAG_Int(REGB3)>UNTAG_Int(REGB2));
-        /* ./../lib/standard//collection//array.nit:356 */
+        /* ../lib/standard/collection/array.nit:397 */
         if (UNTAG_Bool(REGB4)) {
-          /* ./../lib/standard//collection//array.nit:357 */
+          /* ../lib/standard/collection/array.nit:398 */
           while(1) {
-            /* ./../lib/standard//kernel.nit:214 */
+            REGB4 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB2), VTID_standard___kernel___Comparable___OTHER(REGB2))) /*cast OTHER*/;
+            if (UNTAG_Bool(REGB4)) {
+            } else {
+              nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+            }
+            /* ../lib/standard/kernel.nit:234 */
             REGB4 = TAG_Bool(UNTAG_Int(REGB2)<=UNTAG_Int(REGB1));
-            /* ./../lib/standard//collection//array.nit:357 */
+            /* ../lib/standard/collection/array.nit:398 */
             if (UNTAG_Bool(REGB4)) {
-              /* ./../lib/standard//collection//array.nit:243 */
+              /* ../lib/standard/collection/array.nit:278 */
               fra.me.REG[2] = fra.me.REG[0];
               REGB4 = REGB2;
-              /* ./../lib/standard//collection//array.nit:245 */
+              /* ../lib/standard/collection/array.nit:280 */
               REGB5 = TAG_Int(0);
-              /* ./../lib/standard//kernel.nit:216 */
+              REGB6 = TAG_Bool(VAL_ISA(REGB5, VTCOLOR_standard___kernel___Comparable___OTHER(REGB4), VTID_standard___kernel___Comparable___OTHER(REGB4))) /*cast OTHER*/;
+              if (UNTAG_Bool(REGB6)) {
+              } else {
+               nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+              }
+              /* ../lib/standard/kernel.nit:236 */
               REGB5 = TAG_Bool(UNTAG_Int(REGB4)>=UNTAG_Int(REGB5));
-              /* ./../lib/standard//collection//array.nit:245 */
+              /* ../lib/standard/collection/array.nit:280 */
               if (UNTAG_Bool(REGB5)) {
                REGB5 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
                if (UNTAG_Bool(REGB5)) {
                } else {
-               nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 245);
+               nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 280);
                }
                REGB5 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
-               /* ./../lib/standard//kernel.nit:215 */
+               REGB6 = TAG_Bool(VAL_ISA(REGB5, VTCOLOR_standard___kernel___Comparable___OTHER(REGB4), VTID_standard___kernel___Comparable___OTHER(REGB4))) /*cast OTHER*/;
+               if (UNTAG_Bool(REGB6)) {
+               } else {
+               nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+               }
+               /* ../lib/standard/kernel.nit:235 */
                REGB5 = TAG_Bool(UNTAG_Int(REGB4)<UNTAG_Int(REGB5));
               } else {
-               /* ./../lib/standard//collection//array.nit:245 */
-               REGB6 = TAG_Bool(false);
+               /* ../lib/standard/collection/array.nit:280 */
+               REGB6 = TAG_Bool(0);
                REGB5 = REGB6;
               }
               if (UNTAG_Bool(REGB5)) {
               } else {
-               nit_abort("Assert %s  failed", "'index'", LOCATE_standard___collection___array, 245);
+               nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
               }
-              /* ./../lib/standard//collection//array.nit:246 */
+              /* ../lib/standard/collection/array.nit:281 */
               fra.me.REG[2] = ATTR_standard___collection___array___Array____items(fra.me.REG[2]);
               REGB5 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
               if (UNTAG_Bool(REGB5)) {
-               nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 246);
+               nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 281);
               }
-              /* ./../lib/standard//collection//array.nit:654 */
+              /* ../lib/standard/collection/array.nit:724 */
               fra.me.REG[2] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB4)];
-              /* ./../lib/standard//collection//array.nit:246 */
+              /* ../lib/standard/collection/array.nit:281 */
               goto label3;
               label3: while(0);
-              /* ./../lib/standard//collection//array.nit:357 */
+              /* ../lib/standard/collection/array.nit:398 */
               REGB4 = ((val_t (*)(struct stack_frame_t *, val_t, val_t))(CREG[0]))(closctx_param, fra.me.REG[2], fra.me.REG[1]);
               if (closctx_param->has_broke) {
                goto label1;
               }
               REGB5 = TAG_Int(0);
-              /* ./../lib/standard//kernel.nit:214 */
+              REGB6 = TAG_Bool(VAL_ISA(REGB5, VTCOLOR_standard___kernel___Comparable___OTHER(REGB4), VTID_standard___kernel___Comparable___OTHER(REGB4))) /*cast OTHER*/;
+              if (UNTAG_Bool(REGB6)) {
+              } else {
+               nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+              }
+              /* ../lib/standard/kernel.nit:234 */
               REGB5 = TAG_Bool(UNTAG_Int(REGB4)<=UNTAG_Int(REGB5));
             } else {
-              /* ./../lib/standard//collection//array.nit:357 */
-              REGB4 = TAG_Bool(false);
+              /* ../lib/standard/collection/array.nit:398 */
+              REGB4 = TAG_Bool(0);
               REGB5 = REGB4;
             }
             if (UNTAG_Bool(REGB5)) {
               REGB5 = TAG_Int(1);
-              /* ./../lib/standard//kernel.nit:218 */
+              /* ../lib/standard/kernel.nit:238 */
               REGB5 = TAG_Int(UNTAG_Int(REGB2)+UNTAG_Int(REGB5));
-              /* ./../lib/standard//collection//array.nit:357 */
+              /* ../lib/standard/collection/array.nit:398 */
               REGB2 = REGB5;
             } else {
               goto label4;
             }
           }
           label4: while(0);
-          /* ./../lib/standard//collection//array.nit:358 */
+          /* ../lib/standard/collection/array.nit:399 */
           while(1) {
-            /* ./../lib/standard//kernel.nit:217 */
+            REGB5 = TAG_Bool(VAL_ISA(REGB2, VTCOLOR_standard___kernel___Comparable___OTHER(REGB3), VTID_standard___kernel___Comparable___OTHER(REGB3))) /*cast OTHER*/;
+            if (UNTAG_Bool(REGB5)) {
+            } else {
+              nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+            }
+            /* ../lib/standard/kernel.nit:237 */
             REGB5 = TAG_Bool(UNTAG_Int(REGB3)>UNTAG_Int(REGB2));
-            /* ./../lib/standard//collection//array.nit:358 */
+            /* ../lib/standard/collection/array.nit:399 */
             if (UNTAG_Bool(REGB5)) {
-              /* ./../lib/standard//collection//array.nit:243 */
+              /* ../lib/standard/collection/array.nit:278 */
               fra.me.REG[2] = fra.me.REG[0];
               REGB5 = REGB3;
-              /* ./../lib/standard//collection//array.nit:245 */
+              /* ../lib/standard/collection/array.nit:280 */
               REGB4 = TAG_Int(0);
-              /* ./../lib/standard//kernel.nit:216 */
+              REGB6 = TAG_Bool(VAL_ISA(REGB4, VTCOLOR_standard___kernel___Comparable___OTHER(REGB5), VTID_standard___kernel___Comparable___OTHER(REGB5))) /*cast OTHER*/;
+              if (UNTAG_Bool(REGB6)) {
+              } else {
+               nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+              }
+              /* ../lib/standard/kernel.nit:236 */
               REGB4 = TAG_Bool(UNTAG_Int(REGB5)>=UNTAG_Int(REGB4));
-              /* ./../lib/standard//collection//array.nit:245 */
+              /* ../lib/standard/collection/array.nit:280 */
               if (UNTAG_Bool(REGB4)) {
                REGB4 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
                if (UNTAG_Bool(REGB4)) {
                } else {
-               nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 245);
+               nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 280);
                }
                REGB4 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
-               /* ./../lib/standard//kernel.nit:215 */
+               REGB6 = TAG_Bool(VAL_ISA(REGB4, VTCOLOR_standard___kernel___Comparable___OTHER(REGB5), VTID_standard___kernel___Comparable___OTHER(REGB5))) /*cast OTHER*/;
+               if (UNTAG_Bool(REGB6)) {
+               } else {
+               nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+               }
+               /* ../lib/standard/kernel.nit:235 */
                REGB4 = TAG_Bool(UNTAG_Int(REGB5)<UNTAG_Int(REGB4));
               } else {
-               /* ./../lib/standard//collection//array.nit:245 */
-               REGB6 = TAG_Bool(false);
+               /* ../lib/standard/collection/array.nit:280 */
+               REGB6 = TAG_Bool(0);
                REGB4 = REGB6;
               }
               if (UNTAG_Bool(REGB4)) {
               } else {
-               nit_abort("Assert %s  failed", "'index'", LOCATE_standard___collection___array, 245);
+               nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
               }
-              /* ./../lib/standard//collection//array.nit:246 */
+              /* ../lib/standard/collection/array.nit:281 */
               fra.me.REG[2] = ATTR_standard___collection___array___Array____items(fra.me.REG[2]);
               REGB4 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
               if (UNTAG_Bool(REGB4)) {
-               nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 246);
+               nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 281);
               }
-              /* ./../lib/standard//collection//array.nit:654 */
+              /* ../lib/standard/collection/array.nit:724 */
               fra.me.REG[2] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB5)];
-              /* ./../lib/standard//collection//array.nit:246 */
+              /* ../lib/standard/collection/array.nit:281 */
               goto label5;
               label5: while(0);
-              /* ./../lib/standard//collection//array.nit:358 */
+              /* ../lib/standard/collection/array.nit:399 */
               REGB5 = ((val_t (*)(struct stack_frame_t *, val_t, val_t))(CREG[0]))(closctx_param, fra.me.REG[2], fra.me.REG[1]);
               if (closctx_param->has_broke) {
                goto label1;
               }
               REGB4 = TAG_Int(0);
-              /* ./../lib/standard//kernel.nit:216 */
+              REGB6 = TAG_Bool(VAL_ISA(REGB4, VTCOLOR_standard___kernel___Comparable___OTHER(REGB5), VTID_standard___kernel___Comparable___OTHER(REGB5))) /*cast OTHER*/;
+              if (UNTAG_Bool(REGB6)) {
+              } else {
+               nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+              }
+              /* ../lib/standard/kernel.nit:236 */
               REGB4 = TAG_Bool(UNTAG_Int(REGB5)>=UNTAG_Int(REGB4));
             } else {
-              /* ./../lib/standard//collection//array.nit:358 */
-              REGB5 = TAG_Bool(false);
+              /* ../lib/standard/collection/array.nit:399 */
+              REGB5 = TAG_Bool(0);
               REGB4 = REGB5;
             }
             if (UNTAG_Bool(REGB4)) {
               REGB4 = TAG_Int(1);
-              /* ./../lib/standard//kernel.nit:220 */
+              /* ../lib/standard/kernel.nit:240 */
               REGB4 = TAG_Int(UNTAG_Int(REGB3)-UNTAG_Int(REGB4));
-              /* ./../lib/standard//collection//array.nit:358 */
+              /* ../lib/standard/collection/array.nit:399 */
               REGB3 = REGB4;
             } else {
               goto label6;
             }
           }
           label6: while(0);
-          /* ./../lib/standard//kernel.nit:217 */
+          REGB4 = TAG_Bool(VAL_ISA(REGB2, VTCOLOR_standard___kernel___Comparable___OTHER(REGB3), VTID_standard___kernel___Comparable___OTHER(REGB3))) /*cast OTHER*/;
+          if (UNTAG_Bool(REGB4)) {
+          } else {
+            nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+          }
+          /* ../lib/standard/kernel.nit:237 */
           REGB4 = TAG_Bool(UNTAG_Int(REGB3)>UNTAG_Int(REGB2));
-          /* ./../lib/standard//collection//array.nit:359 */
+          /* ../lib/standard/collection/array.nit:400 */
           if (UNTAG_Bool(REGB4)) {
-            /* ./../lib/standard//collection//array.nit:243 */
+            /* ../lib/standard/collection/array.nit:278 */
             fra.me.REG[2] = fra.me.REG[0];
             REGB4 = REGB2;
-            /* ./../lib/standard//collection//array.nit:245 */
+            /* ../lib/standard/collection/array.nit:280 */
             REGB5 = TAG_Int(0);
-            /* ./../lib/standard//kernel.nit:216 */
+            REGB6 = TAG_Bool(VAL_ISA(REGB5, VTCOLOR_standard___kernel___Comparable___OTHER(REGB4), VTID_standard___kernel___Comparable___OTHER(REGB4))) /*cast OTHER*/;
+            if (UNTAG_Bool(REGB6)) {
+            } else {
+              nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+            }
+            /* ../lib/standard/kernel.nit:236 */
             REGB5 = TAG_Bool(UNTAG_Int(REGB4)>=UNTAG_Int(REGB5));
-            /* ./../lib/standard//collection//array.nit:245 */
+            /* ../lib/standard/collection/array.nit:280 */
             if (UNTAG_Bool(REGB5)) {
               REGB5 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
               if (UNTAG_Bool(REGB5)) {
               } else {
-               nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 245);
+               nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 280);
               }
               REGB5 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
-              /* ./../lib/standard//kernel.nit:215 */
+              REGB6 = TAG_Bool(VAL_ISA(REGB5, VTCOLOR_standard___kernel___Comparable___OTHER(REGB4), VTID_standard___kernel___Comparable___OTHER(REGB4))) /*cast OTHER*/;
+              if (UNTAG_Bool(REGB6)) {
+              } else {
+               nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+              }
+              /* ../lib/standard/kernel.nit:235 */
               REGB5 = TAG_Bool(UNTAG_Int(REGB4)<UNTAG_Int(REGB5));
             } else {
-              /* ./../lib/standard//collection//array.nit:245 */
-              REGB6 = TAG_Bool(false);
+              /* ../lib/standard/collection/array.nit:280 */
+              REGB6 = TAG_Bool(0);
               REGB5 = REGB6;
             }
             if (UNTAG_Bool(REGB5)) {
             } else {
-              nit_abort("Assert %s  failed", "'index'", LOCATE_standard___collection___array, 245);
+              nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
             }
-            /* ./../lib/standard//collection//array.nit:246 */
+            /* ../lib/standard/collection/array.nit:281 */
             fra.me.REG[2] = ATTR_standard___collection___array___Array____items(fra.me.REG[2]);
             REGB5 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
             if (UNTAG_Bool(REGB5)) {
-              nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 246);
+              nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 281);
             }
-            /* ./../lib/standard//collection//array.nit:654 */
+            /* ../lib/standard/collection/array.nit:724 */
             fra.me.REG[2] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB4)];
-            /* ./../lib/standard//collection//array.nit:246 */
+            /* ../lib/standard/collection/array.nit:281 */
             goto label7;
             label7: while(0);
-            /* ./../lib/standard//collection//array.nit:243 */
+            /* ../lib/standard/collection/array.nit:278 */
             fra.me.REG[3] = fra.me.REG[0];
             REGB4 = REGB3;
-            /* ./../lib/standard//collection//array.nit:245 */
+            /* ../lib/standard/collection/array.nit:280 */
             REGB5 = TAG_Int(0);
-            /* ./../lib/standard//kernel.nit:216 */
+            REGB6 = TAG_Bool(VAL_ISA(REGB5, VTCOLOR_standard___kernel___Comparable___OTHER(REGB4), VTID_standard___kernel___Comparable___OTHER(REGB4))) /*cast OTHER*/;
+            if (UNTAG_Bool(REGB6)) {
+            } else {
+              nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+            }
+            /* ../lib/standard/kernel.nit:236 */
             REGB5 = TAG_Bool(UNTAG_Int(REGB4)>=UNTAG_Int(REGB5));
-            /* ./../lib/standard//collection//array.nit:245 */
+            /* ../lib/standard/collection/array.nit:280 */
             if (UNTAG_Bool(REGB5)) {
               REGB5 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[3])!=NIT_NULL);
               if (UNTAG_Bool(REGB5)) {
               } else {
-               nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 245);
+               nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 280);
               }
               REGB5 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[3]);
-              /* ./../lib/standard//kernel.nit:215 */
+              REGB6 = TAG_Bool(VAL_ISA(REGB5, VTCOLOR_standard___kernel___Comparable___OTHER(REGB4), VTID_standard___kernel___Comparable___OTHER(REGB4))) /*cast OTHER*/;
+              if (UNTAG_Bool(REGB6)) {
+              } else {
+               nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+              }
+              /* ../lib/standard/kernel.nit:235 */
               REGB5 = TAG_Bool(UNTAG_Int(REGB4)<UNTAG_Int(REGB5));
             } else {
-              /* ./../lib/standard//collection//array.nit:245 */
-              REGB6 = TAG_Bool(false);
+              /* ../lib/standard/collection/array.nit:280 */
+              REGB6 = TAG_Bool(0);
               REGB5 = REGB6;
             }
             if (UNTAG_Bool(REGB5)) {
             } else {
-              nit_abort("Assert %s  failed", "'index'", LOCATE_standard___collection___array, 245);
+              nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
             }
-            /* ./../lib/standard//collection//array.nit:246 */
+            /* ../lib/standard/collection/array.nit:281 */
             fra.me.REG[3] = ATTR_standard___collection___array___Array____items(fra.me.REG[3]);
             REGB5 = TAG_Bool(fra.me.REG[3]==NIT_NULL);
             if (UNTAG_Bool(REGB5)) {
-              nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 246);
+              nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 281);
             }
-            /* ./../lib/standard//collection//array.nit:654 */
+            /* ../lib/standard/collection/array.nit:724 */
             fra.me.REG[3] = ((Nit_NativeArray)fra.me.REG[3])->val[UNTAG_Int(REGB4)];
-            /* ./../lib/standard//collection//array.nit:246 */
+            /* ../lib/standard/collection/array.nit:281 */
             goto label8;
             label8: while(0);
-            /* ./../lib/standard//collection//array.nit:361 */
-            CALL_standard___collection___abstract_collection___Map_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB2, fra.me.REG[3]);
-            /* ./../lib/standard//collection//array.nit:362 */
-            CALL_standard___collection___abstract_collection___Map_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB3, fra.me.REG[2]);
+            /* ../lib/standard/collection/array.nit:402 */
+            CALL_standard___collection___abstract_collection___Sequence_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB2, fra.me.REG[3]);
+            /* ../lib/standard/collection/array.nit:403 */
+            CALL_standard___collection___abstract_collection___Sequence_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB3, fra.me.REG[2]);
           }
         } else {
-          /* ./../lib/standard//collection//array.nit:356 */
+          /* ../lib/standard/collection/array.nit:397 */
           goto label9;
         }
       }
       label9: while(0);
-      /* ./../lib/standard//collection//array.nit:365 */
+      /* ../lib/standard/collection/array.nit:406 */
       REGB3 = TAG_Int(1);
-      /* ./../lib/standard//kernel.nit:220 */
+      /* ../lib/standard/kernel.nit:240 */
       REGB3 = TAG_Int(UNTAG_Int(REGB2)-UNTAG_Int(REGB3));
-      /* ./../lib/standard//collection//array.nit:243 */
+      /* ../lib/standard/collection/array.nit:278 */
       fra.me.REG[2] = fra.me.REG[0];
-      /* ./../lib/standard//collection//array.nit:245 */
+      /* ../lib/standard/collection/array.nit:280 */
       REGB4 = TAG_Int(0);
-      /* ./../lib/standard//kernel.nit:216 */
+      REGB5 = TAG_Bool(VAL_ISA(REGB4, VTCOLOR_standard___kernel___Comparable___OTHER(REGB3), VTID_standard___kernel___Comparable___OTHER(REGB3))) /*cast OTHER*/;
+      if (UNTAG_Bool(REGB5)) {
+      } else {
+        nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+      }
+      /* ../lib/standard/kernel.nit:236 */
       REGB4 = TAG_Bool(UNTAG_Int(REGB3)>=UNTAG_Int(REGB4));
-      /* ./../lib/standard//collection//array.nit:245 */
+      /* ../lib/standard/collection/array.nit:280 */
       if (UNTAG_Bool(REGB4)) {
         REGB4 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
         if (UNTAG_Bool(REGB4)) {
         } else {
-          nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 245);
+          nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 280);
         }
         REGB4 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
-        /* ./../lib/standard//kernel.nit:215 */
+        REGB5 = TAG_Bool(VAL_ISA(REGB4, VTCOLOR_standard___kernel___Comparable___OTHER(REGB3), VTID_standard___kernel___Comparable___OTHER(REGB3))) /*cast OTHER*/;
+        if (UNTAG_Bool(REGB5)) {
+        } else {
+          nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+        }
+        /* ../lib/standard/kernel.nit:235 */
         REGB4 = TAG_Bool(UNTAG_Int(REGB3)<UNTAG_Int(REGB4));
       } else {
-        /* ./../lib/standard//collection//array.nit:245 */
-        REGB5 = TAG_Bool(false);
+        /* ../lib/standard/collection/array.nit:280 */
+        REGB5 = TAG_Bool(0);
         REGB4 = REGB5;
       }
       if (UNTAG_Bool(REGB4)) {
       } else {
-        nit_abort("Assert %s  failed", "'index'", LOCATE_standard___collection___array, 245);
+        nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
       }
-      /* ./../lib/standard//collection//array.nit:246 */
+      /* ../lib/standard/collection/array.nit:281 */
       fra.me.REG[2] = ATTR_standard___collection___array___Array____items(fra.me.REG[2]);
       REGB4 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
       if (UNTAG_Bool(REGB4)) {
-        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 246);
+        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 281);
       }
-      /* ./../lib/standard//collection//array.nit:654 */
+      /* ../lib/standard/collection/array.nit:724 */
       fra.me.REG[2] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB3)];
-      /* ./../lib/standard//collection//array.nit:246 */
+      /* ../lib/standard/collection/array.nit:281 */
       goto label10;
       label10: while(0);
-      /* ./../lib/standard//collection//array.nit:365 */
-      CALL_standard___collection___abstract_collection___Map_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB0, fra.me.REG[2]);
-      /* ./../lib/standard//collection//array.nit:366 */
+      /* ../lib/standard/collection/array.nit:406 */
+      CALL_standard___collection___abstract_collection___Sequence_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB0, fra.me.REG[2]);
+      /* ../lib/standard/collection/array.nit:407 */
       REGB3 = TAG_Int(1);
-      /* ./../lib/standard//kernel.nit:220 */
+      /* ../lib/standard/kernel.nit:240 */
       REGB3 = TAG_Int(UNTAG_Int(REGB2)-UNTAG_Int(REGB3));
-      /* ./../lib/standard//collection//array.nit:366 */
-      CALL_standard___collection___abstract_collection___Map_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB3, fra.me.REG[1]);
-      /* ./../lib/standard//collection//array.nit:367 */
+      /* ../lib/standard/collection/array.nit:407 */
+      CALL_standard___collection___abstract_collection___Sequence_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB3, fra.me.REG[1]);
+      /* ../lib/standard/collection/array.nit:408 */
       REGB3 = TAG_Int(2);
-      /* ./../lib/standard//kernel.nit:220 */
+      /* ../lib/standard/kernel.nit:240 */
       REGB3 = TAG_Int(UNTAG_Int(REGB2)-UNTAG_Int(REGB3));
       CALL_standard___collection___array___Array___sub_sort(fra.me.REG[0])(fra.me.REG[0], REGB0, REGB3, (&(fra.me)), ((fun_t)OC_standard___collection___array___Array___sub_sort_11));
       switch ((&(fra.me))->has_broke) {
@@ -2293,221 +2648,276 @@ void standard___collection___array___Array___sub_sort(val_t p0, val_t p1, val_t
         case 1: (&(fra.me))->has_broke = 0; goto label1;
       }
     } else {
-      /* ./../lib/standard//collection//array.nit:371 */
+      /* ../lib/standard/collection/array.nit:412 */
       while(1) {
-        /* ./../lib/standard//kernel.nit:215 */
+        REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+        if (UNTAG_Bool(REGB2)) {
+        } else {
+          nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+        }
+        /* ../lib/standard/kernel.nit:235 */
         REGB2 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
-        /* ./../lib/standard//collection//array.nit:371 */
+        /* ../lib/standard/collection/array.nit:412 */
         if (UNTAG_Bool(REGB2)) {
-          /* ./../lib/standard//collection//array.nit:372 */
+          /* ../lib/standard/collection/array.nit:413 */
           REGB2 = REGB0;
-          /* ./../lib/standard//collection//array.nit:243 */
+          /* ../lib/standard/collection/array.nit:278 */
           fra.me.REG[1] = fra.me.REG[0];
           REGB3 = REGB0;
-          /* ./../lib/standard//collection//array.nit:245 */
+          /* ../lib/standard/collection/array.nit:280 */
           REGB4 = TAG_Int(0);
-          /* ./../lib/standard//kernel.nit:216 */
+          REGB5 = TAG_Bool(VAL_ISA(REGB4, VTCOLOR_standard___kernel___Comparable___OTHER(REGB3), VTID_standard___kernel___Comparable___OTHER(REGB3))) /*cast OTHER*/;
+          if (UNTAG_Bool(REGB5)) {
+          } else {
+            nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+          }
+          /* ../lib/standard/kernel.nit:236 */
           REGB4 = TAG_Bool(UNTAG_Int(REGB3)>=UNTAG_Int(REGB4));
-          /* ./../lib/standard//collection//array.nit:245 */
+          /* ../lib/standard/collection/array.nit:280 */
           if (UNTAG_Bool(REGB4)) {
             REGB4 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[1])!=NIT_NULL);
             if (UNTAG_Bool(REGB4)) {
             } else {
-              nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 245);
+              nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 280);
             }
             REGB4 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[1]);
-            /* ./../lib/standard//kernel.nit:215 */
-            REGB4 = TAG_Bool(UNTAG_Int(REGB3)<UNTAG_Int(REGB4));
-          } else {
-            /* ./../lib/standard//collection//array.nit:245 */
-            REGB5 = TAG_Bool(false);
+            REGB5 = TAG_Bool(VAL_ISA(REGB4, VTCOLOR_standard___kernel___Comparable___OTHER(REGB3), VTID_standard___kernel___Comparable___OTHER(REGB3))) /*cast OTHER*/;
+            if (UNTAG_Bool(REGB5)) {
+            } else {
+              nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+            }
+            /* ../lib/standard/kernel.nit:235 */
+            REGB4 = TAG_Bool(UNTAG_Int(REGB3)<UNTAG_Int(REGB4));
+          } else {
+            /* ../lib/standard/collection/array.nit:280 */
+            REGB5 = TAG_Bool(0);
             REGB4 = REGB5;
           }
           if (UNTAG_Bool(REGB4)) {
           } else {
-            nit_abort("Assert %s  failed", "'index'", LOCATE_standard___collection___array, 245);
+            nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
           }
-          /* ./../lib/standard//collection//array.nit:246 */
+          /* ../lib/standard/collection/array.nit:281 */
           fra.me.REG[1] = ATTR_standard___collection___array___Array____items(fra.me.REG[1]);
           REGB4 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
           if (UNTAG_Bool(REGB4)) {
-            nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 246);
+            nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 281);
           }
-          /* ./../lib/standard//collection//array.nit:654 */
+          /* ../lib/standard/collection/array.nit:724 */
           fra.me.REG[1] = ((Nit_NativeArray)fra.me.REG[1])->val[UNTAG_Int(REGB3)];
-          /* ./../lib/standard//collection//array.nit:246 */
+          /* ../lib/standard/collection/array.nit:281 */
           goto label15;
           label15: while(0);
-          /* ./../lib/standard//collection//array.nit:374 */
+          /* ../lib/standard/collection/array.nit:415 */
           REGB3 = REGB0;
-          /* ./../lib/standard//collection//array.nit:375 */
+          /* ../lib/standard/collection/array.nit:416 */
           while(1) {
-            /* ./../lib/standard//kernel.nit:214 */
+            REGB4 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB3), VTID_standard___kernel___Comparable___OTHER(REGB3))) /*cast OTHER*/;
+            if (UNTAG_Bool(REGB4)) {
+            } else {
+              nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+            }
+            /* ../lib/standard/kernel.nit:234 */
             REGB4 = TAG_Bool(UNTAG_Int(REGB3)<=UNTAG_Int(REGB1));
-            /* ./../lib/standard//collection//array.nit:375 */
+            /* ../lib/standard/collection/array.nit:416 */
             if (UNTAG_Bool(REGB4)) {
-              /* ./../lib/standard//collection//array.nit:243 */
+              /* ../lib/standard/collection/array.nit:278 */
               fra.me.REG[2] = fra.me.REG[0];
               REGB4 = REGB3;
-              /* ./../lib/standard//collection//array.nit:245 */
+              /* ../lib/standard/collection/array.nit:280 */
               REGB5 = TAG_Int(0);
-              /* ./../lib/standard//kernel.nit:216 */
+              REGB6 = TAG_Bool(VAL_ISA(REGB5, VTCOLOR_standard___kernel___Comparable___OTHER(REGB4), VTID_standard___kernel___Comparable___OTHER(REGB4))) /*cast OTHER*/;
+              if (UNTAG_Bool(REGB6)) {
+              } else {
+               nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+              }
+              /* ../lib/standard/kernel.nit:236 */
               REGB5 = TAG_Bool(UNTAG_Int(REGB4)>=UNTAG_Int(REGB5));
-              /* ./../lib/standard//collection//array.nit:245 */
+              /* ../lib/standard/collection/array.nit:280 */
               if (UNTAG_Bool(REGB5)) {
                REGB5 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
                if (UNTAG_Bool(REGB5)) {
                } else {
-               nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 245);
+               nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 280);
                }
                REGB5 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
-               /* ./../lib/standard//kernel.nit:215 */
+               REGB6 = TAG_Bool(VAL_ISA(REGB5, VTCOLOR_standard___kernel___Comparable___OTHER(REGB4), VTID_standard___kernel___Comparable___OTHER(REGB4))) /*cast OTHER*/;
+               if (UNTAG_Bool(REGB6)) {
+               } else {
+               nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+               }
+               /* ../lib/standard/kernel.nit:235 */
                REGB5 = TAG_Bool(UNTAG_Int(REGB4)<UNTAG_Int(REGB5));
               } else {
-               /* ./../lib/standard//collection//array.nit:245 */
-               REGB6 = TAG_Bool(false);
+               /* ../lib/standard/collection/array.nit:280 */
+               REGB6 = TAG_Bool(0);
                REGB5 = REGB6;
               }
               if (UNTAG_Bool(REGB5)) {
               } else {
-               nit_abort("Assert %s  failed", "'index'", LOCATE_standard___collection___array, 245);
+               nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
               }
-              /* ./../lib/standard//collection//array.nit:246 */
+              /* ../lib/standard/collection/array.nit:281 */
               fra.me.REG[2] = ATTR_standard___collection___array___Array____items(fra.me.REG[2]);
               REGB5 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
               if (UNTAG_Bool(REGB5)) {
-               nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 246);
+               nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 281);
               }
-              /* ./../lib/standard//collection//array.nit:654 */
+              /* ../lib/standard/collection/array.nit:724 */
               fra.me.REG[2] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB4)];
-              /* ./../lib/standard//collection//array.nit:246 */
+              /* ../lib/standard/collection/array.nit:281 */
               goto label16;
               label16: while(0);
-              /* ./../lib/standard//collection//array.nit:376 */
+              /* ../lib/standard/collection/array.nit:417 */
               REGB4 = ((val_t (*)(struct stack_frame_t *, val_t, val_t))(CREG[0]))(closctx_param, fra.me.REG[1], fra.me.REG[2]);
               if (closctx_param->has_broke) {
                goto label1;
               }
               REGB5 = TAG_Int(0);
-              /* ./../lib/standard//kernel.nit:217 */
+              REGB6 = TAG_Bool(VAL_ISA(REGB5, VTCOLOR_standard___kernel___Comparable___OTHER(REGB4), VTID_standard___kernel___Comparable___OTHER(REGB4))) /*cast OTHER*/;
+              if (UNTAG_Bool(REGB6)) {
+              } else {
+               nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+              }
+              /* ../lib/standard/kernel.nit:237 */
               REGB5 = TAG_Bool(UNTAG_Int(REGB4)>UNTAG_Int(REGB5));
-              /* ./../lib/standard//collection//array.nit:376 */
+              /* ../lib/standard/collection/array.nit:417 */
               if (UNTAG_Bool(REGB5)) {
-               /* ./../lib/standard//collection//array.nit:377 */
+               /* ../lib/standard/collection/array.nit:418 */
                REGB2 = REGB3;
-               /* ./../lib/standard//collection//array.nit:243 */
+               /* ../lib/standard/collection/array.nit:278 */
                fra.me.REG[2] = fra.me.REG[0];
                REGB5 = REGB3;
-               /* ./../lib/standard//collection//array.nit:245 */
+               /* ../lib/standard/collection/array.nit:280 */
                REGB4 = TAG_Int(0);
-               /* ./../lib/standard//kernel.nit:216 */
+               REGB6 = TAG_Bool(VAL_ISA(REGB4, VTCOLOR_standard___kernel___Comparable___OTHER(REGB5), VTID_standard___kernel___Comparable___OTHER(REGB5))) /*cast OTHER*/;
+               if (UNTAG_Bool(REGB6)) {
+               } else {
+               nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+               }
+               /* ../lib/standard/kernel.nit:236 */
                REGB4 = TAG_Bool(UNTAG_Int(REGB5)>=UNTAG_Int(REGB4));
-               /* ./../lib/standard//collection//array.nit:245 */
+               /* ../lib/standard/collection/array.nit:280 */
                if (UNTAG_Bool(REGB4)) {
                REGB4 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
                if (UNTAG_Bool(REGB4)) {
                } else {
-               nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 245);
+               nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 280);
                }
                REGB4 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
-               /* ./../lib/standard//kernel.nit:215 */
+               REGB6 = TAG_Bool(VAL_ISA(REGB4, VTCOLOR_standard___kernel___Comparable___OTHER(REGB5), VTID_standard___kernel___Comparable___OTHER(REGB5))) /*cast OTHER*/;
+               if (UNTAG_Bool(REGB6)) {
+               } else {
+               nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+               }
+               /* ../lib/standard/kernel.nit:235 */
                REGB4 = TAG_Bool(UNTAG_Int(REGB5)<UNTAG_Int(REGB4));
                } else {
-               /* ./../lib/standard//collection//array.nit:245 */
-               REGB6 = TAG_Bool(false);
+               /* ../lib/standard/collection/array.nit:280 */
+               REGB6 = TAG_Bool(0);
                REGB4 = REGB6;
                }
                if (UNTAG_Bool(REGB4)) {
                } else {
-               nit_abort("Assert %s  failed", "'index'", LOCATE_standard___collection___array, 245);
+               nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
                }
-               /* ./../lib/standard//collection//array.nit:246 */
+               /* ../lib/standard/collection/array.nit:281 */
                fra.me.REG[2] = ATTR_standard___collection___array___Array____items(fra.me.REG[2]);
                REGB4 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
                if (UNTAG_Bool(REGB4)) {
-               nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 246);
+               nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 281);
                }
-               /* ./../lib/standard//collection//array.nit:654 */
+               /* ../lib/standard/collection/array.nit:724 */
                fra.me.REG[2] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB5)];
-               /* ./../lib/standard//collection//array.nit:246 */
+               /* ../lib/standard/collection/array.nit:281 */
                goto label17;
                label17: while(0);
-               /* ./../lib/standard//collection//array.nit:378 */
+               /* ../lib/standard/collection/array.nit:419 */
                fra.me.REG[1] = fra.me.REG[2];
               }
-              /* ./../lib/standard//collection//array.nit:380 */
+              /* ../lib/standard/collection/array.nit:421 */
               REGB5 = TAG_Int(1);
-              /* ./../lib/standard//kernel.nit:218 */
+              /* ../lib/standard/kernel.nit:238 */
               REGB5 = TAG_Int(UNTAG_Int(REGB3)+UNTAG_Int(REGB5));
-              /* ./../lib/standard//collection//array.nit:380 */
+              /* ../lib/standard/collection/array.nit:421 */
               REGB3 = REGB5;
             } else {
-              /* ./../lib/standard//collection//array.nit:375 */
+              /* ../lib/standard/collection/array.nit:416 */
               goto label18;
             }
           }
           label18: while(0);
-          /* ./../lib/standard//collection//array.nit:382 */
+          /* ../lib/standard/collection/array.nit:423 */
           REGB3 = TAG_Bool(IS_EQUAL_OO(REGB2,REGB0));
           if (UNTAG_Bool(REGB3)) {
           } else {
-            /* ./../lib/standard//kernel.nit:210 */
+            /* ../lib/standard/kernel.nit:230 */
             REGB5 = TAG_Bool((REGB2)==(REGB0));
-            /* ./../lib/standard//collection//array.nit:382 */
+            /* ../lib/standard/collection/array.nit:423 */
             REGB3 = REGB5;
           }
           REGB3 = TAG_Bool(!UNTAG_Bool(REGB3));
           if (UNTAG_Bool(REGB3)) {
-            /* ./../lib/standard//collection//array.nit:243 */
+            /* ../lib/standard/collection/array.nit:278 */
             fra.me.REG[2] = fra.me.REG[0];
             REGB3 = REGB0;
-            /* ./../lib/standard//collection//array.nit:245 */
+            /* ../lib/standard/collection/array.nit:280 */
             REGB5 = TAG_Int(0);
-            /* ./../lib/standard//kernel.nit:216 */
+            REGB4 = TAG_Bool(VAL_ISA(REGB5, VTCOLOR_standard___kernel___Comparable___OTHER(REGB3), VTID_standard___kernel___Comparable___OTHER(REGB3))) /*cast OTHER*/;
+            if (UNTAG_Bool(REGB4)) {
+            } else {
+              nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+            }
+            /* ../lib/standard/kernel.nit:236 */
             REGB5 = TAG_Bool(UNTAG_Int(REGB3)>=UNTAG_Int(REGB5));
-            /* ./../lib/standard//collection//array.nit:245 */
+            /* ../lib/standard/collection/array.nit:280 */
             if (UNTAG_Bool(REGB5)) {
               REGB5 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
               if (UNTAG_Bool(REGB5)) {
               } else {
-               nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 245);
+               nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 280);
               }
               REGB5 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
-              /* ./../lib/standard//kernel.nit:215 */
+              REGB4 = TAG_Bool(VAL_ISA(REGB5, VTCOLOR_standard___kernel___Comparable___OTHER(REGB3), VTID_standard___kernel___Comparable___OTHER(REGB3))) /*cast OTHER*/;
+              if (UNTAG_Bool(REGB4)) {
+              } else {
+               nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+              }
+              /* ../lib/standard/kernel.nit:235 */
               REGB5 = TAG_Bool(UNTAG_Int(REGB3)<UNTAG_Int(REGB5));
             } else {
-              /* ./../lib/standard//collection//array.nit:245 */
-              REGB4 = TAG_Bool(false);
+              /* ../lib/standard/collection/array.nit:280 */
+              REGB4 = TAG_Bool(0);
               REGB5 = REGB4;
             }
             if (UNTAG_Bool(REGB5)) {
             } else {
-              nit_abort("Assert %s  failed", "'index'", LOCATE_standard___collection___array, 245);
+              nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
             }
-            /* ./../lib/standard//collection//array.nit:246 */
+            /* ../lib/standard/collection/array.nit:281 */
             fra.me.REG[2] = ATTR_standard___collection___array___Array____items(fra.me.REG[2]);
             REGB5 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
             if (UNTAG_Bool(REGB5)) {
-              nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 246);
+              nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 281);
             }
-            /* ./../lib/standard//collection//array.nit:654 */
+            /* ../lib/standard/collection/array.nit:724 */
             fra.me.REG[2] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB3)];
-            /* ./../lib/standard//collection//array.nit:246 */
+            /* ../lib/standard/collection/array.nit:281 */
             goto label19;
             label19: while(0);
-            /* ./../lib/standard//collection//array.nit:383 */
-            CALL_standard___collection___abstract_collection___Map_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB2, fra.me.REG[2]);
-            /* ./../lib/standard//collection//array.nit:384 */
-            CALL_standard___collection___abstract_collection___Map_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB0, fra.me.REG[1]);
+            /* ../lib/standard/collection/array.nit:424 */
+            CALL_standard___collection___abstract_collection___Sequence_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB2, fra.me.REG[2]);
+            /* ../lib/standard/collection/array.nit:425 */
+            CALL_standard___collection___abstract_collection___Sequence_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB0, fra.me.REG[1]);
           }
-          /* ./../lib/standard//collection//array.nit:386 */
+          /* ../lib/standard/collection/array.nit:427 */
           REGB2 = TAG_Int(1);
-          /* ./../lib/standard//kernel.nit:218 */
+          /* ../lib/standard/kernel.nit:238 */
           REGB2 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB2));
-          /* ./../lib/standard//collection//array.nit:386 */
+          /* ../lib/standard/collection/array.nit:427 */
           REGB0 = REGB2;
         } else {
-          /* ./../lib/standard//collection//array.nit:371 */
+          /* ../lib/standard/collection/array.nit:412 */
           goto label20;
         }
       }
@@ -2522,13 +2932,14 @@ void standard___collection___array___Array___sub_sort(val_t p0, val_t p1, val_t
         struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
         val_t REGB0;
         val_t tmp;
-        /* ./../lib/standard//collection//array.nit:367 */
+        /* ../lib/standard/collection/array.nit:408 */
         fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
         fra.me.file = LOCATE_standard___collection___array;
-        fra.me.line = 367;
+        fra.me.line = 408;
         fra.me.meth = LOCATE_standard___collection___array___Array___sub_sort;
         fra.me.has_broke = 0;
         fra.me.REG_size = 2;
+        fra.me.nitni_local_ref_head = NULL;
         fra.me.REG[0] = NIT_NULL;
         fra.me.REG[1] = NIT_NULL;
         fra.me.REG[0] = p0;
@@ -2547,13 +2958,14 @@ void standard___collection___array___Array___sub_sort(val_t p0, val_t p1, val_t
         struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
         val_t REGB0;
         val_t tmp;
-        /* ./../lib/standard//collection//array.nit:368 */
+        /* ../lib/standard/collection/array.nit:409 */
         fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
         fra.me.file = LOCATE_standard___collection___array;
-        fra.me.line = 368;
+        fra.me.line = 409;
         fra.me.meth = LOCATE_standard___collection___array___Array___sub_sort;
         fra.me.has_broke = 0;
         fra.me.REG_size = 2;
+        fra.me.nitni_local_ref_head = NULL;
         fra.me.REG[0] = NIT_NULL;
         fra.me.REG[1] = NIT_NULL;
         fra.me.REG[0] = p0;
@@ -2568,79 +2980,90 @@ void standard___collection___array___Array___sub_sort(val_t p0, val_t p1, val_t
         stack_frame_head = fra.me.prev;
         return REGB0;
       }
+static const char LOCATE_standard___collection___array___ArrayIterator___item[] = "array::ArrayIterator::(abstract_collection::Iterator::item)";
 val_t standard___collection___array___ArrayIterator___item(val_t p0){
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 395;
+  fra.me.line = 437;
   fra.me.meth = LOCATE_standard___collection___array___ArrayIterator___item;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:395 */
+  /* ../lib/standard/collection/array.nit:437 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayIterator____array(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 395);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 437);
   }
   fra.me.REG[1] = ATTR_standard___collection___array___ArrayIterator____array(fra.me.REG[0]);
   REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayIterator____index(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_index", LOCATE_standard___collection___array, 395);
+    nit_abort("Uninitialized attribute %s", "_index", LOCATE_standard___collection___array, 437);
   }
   REGB0 = ATTR_standard___collection___array___ArrayIterator____index(fra.me.REG[0]);
-  fra.me.REG[1] = CALL_standard___collection___abstract_collection___MapRead_____bra(fra.me.REG[1])(fra.me.REG[1], REGB0);
+  fra.me.REG[1] = CALL_standard___collection___abstract_collection___SequenceRead_____bra(fra.me.REG[1])(fra.me.REG[1], REGB0);
   goto label1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
   return fra.me.REG[1];
 }
+static const char LOCATE_standard___collection___array___ArrayIterator___is_ok[] = "array::ArrayIterator::(abstract_collection::Iterator::is_ok)";
 val_t standard___collection___array___ArrayIterator___is_ok(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
   val_t REGB1;
+  val_t REGB2;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 399;
+  fra.me.line = 441;
   fra.me.meth = LOCATE_standard___collection___array___ArrayIterator___is_ok;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:399 */
+  /* ../lib/standard/collection/array.nit:441 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayIterator____index(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_index", LOCATE_standard___collection___array, 399);
+    nit_abort("Uninitialized attribute %s", "_index", LOCATE_standard___collection___array, 441);
   }
   REGB0 = ATTR_standard___collection___array___ArrayIterator____index(fra.me.REG[0]);
   REGB1 = TAG_Bool(ATTR_standard___collection___array___ArrayIterator____array(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 399);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 441);
   }
   fra.me.REG[0] = ATTR_standard___collection___array___ArrayIterator____array(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:23 */
+  /* ../lib/standard/collection/array.nit:24 */
   REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
   }
   REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-  /* ./../lib/standard//kernel.nit:215 */
+  REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+  if (UNTAG_Bool(REGB2)) {
+  } else {
+    nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+  }
+  /* ../lib/standard/kernel.nit:235 */
   REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
-  /* ./../lib/standard//collection//array.nit:399 */
+  /* ../lib/standard/collection/array.nit:441 */
   goto label1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
   return REGB1;
 }
+static const char LOCATE_standard___collection___array___ArrayIterator___next[] = "array::ArrayIterator::(abstract_collection::Iterator::next)";
 void standard___collection___array___ArrayIterator___next(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
@@ -2648,88 +3071,95 @@ void standard___collection___array___ArrayIterator___next(val_t p0){
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 401;
+  fra.me.line = 443;
   fra.me.meth = LOCATE_standard___collection___array___ArrayIterator___next;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:401 */
+  /* ../lib/standard/collection/array.nit:443 */
   REGB0 = ATTR_standard___collection___array___ArrayIterator____index(fra.me.REG[0]);
   REGB1 = TAG_Int(1);
-  /* ./../lib/standard//kernel.nit:218 */
+  /* ../lib/standard/kernel.nit:238 */
   REGB1 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB1));
-  /* ./../lib/standard//collection//array.nit:401 */
+  /* ../lib/standard/collection/array.nit:443 */
   ATTR_standard___collection___array___ArrayIterator____index(fra.me.REG[0]) = REGB1;
   stack_frame_head = fra.me.prev;
   return;
 }
+static const char LOCATE_standard___collection___array___ArrayIterator___init[] = "array::ArrayIterator::init";
 void standard___collection___array___ArrayIterator___init(val_t p0, val_t p1, int* init_table){
-  int itpos6 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_standard___collection___array___ArrayIterator].i;
+  int itpos7 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_standard___collection___array___ArrayIterator].i;
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
   val_t tmp;
-  if (init_table[itpos6]) return;
+  if (init_table[itpos7]) return;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 403;
+  fra.me.line = 445;
   fra.me.meth = LOCATE_standard___collection___array___ArrayIterator___init;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./../lib/standard//collection//array.nit:405 */
+  /* ../lib/standard/collection/array.nit:447 */
   ATTR_standard___collection___array___ArrayIterator____array(fra.me.REG[0]) = fra.me.REG[1];
-  /* ./../lib/standard//collection//array.nit:406 */
+  /* ../lib/standard/collection/array.nit:448 */
   REGB0 = TAG_Int(0);
   ATTR_standard___collection___array___ArrayIterator____index(fra.me.REG[0]) = REGB0;
   stack_frame_head = fra.me.prev;
-  init_table[itpos6] = 1;
+  init_table[itpos7] = 1;
   return;
 }
+static const char LOCATE_standard___collection___array___ArrayIterator___index[] = "array::ArrayIterator::(abstract_collection::IndexedIterator::index)";
 val_t standard___collection___array___ArrayIterator___index(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 409;
+  fra.me.line = 451;
   fra.me.meth = LOCATE_standard___collection___array___ArrayIterator___index;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:409 */
+  /* ../lib/standard/collection/array.nit:451 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayIterator____index(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_index", LOCATE_standard___collection___array, 409);
+    nit_abort("Uninitialized attribute %s", "_index", LOCATE_standard___collection___array, 451);
   }
   REGB0 = ATTR_standard___collection___array___ArrayIterator____index(fra.me.REG[0]);
   stack_frame_head = fra.me.prev;
   return REGB0;
 }
+static const char LOCATE_standard___collection___array___ArraySet___has[] = "array::ArraySet::(abstract_collection::Collection::has)";
 val_t standard___collection___array___ArraySet___has(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 421;
+  fra.me.line = 464;
   fra.me.meth = LOCATE_standard___collection___array___ArraySet___has;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./../lib/standard//collection//array.nit:421 */
+  /* ../lib/standard/collection/array.nit:464 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 421);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 464);
   }
   fra.me.REG[0] = ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0]);
   REGB0 = CALL_standard___collection___abstract_collection___Collection___has(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
@@ -2738,26 +3168,28 @@ val_t standard___collection___array___ArraySet___has(val_t p0, val_t p1){
   stack_frame_head = fra.me.prev;
   return REGB0;
 }
+static const char LOCATE_standard___collection___array___ArraySet___add[] = "array::ArraySet::(abstract_collection::SimpleCollection::add)";
 void standard___collection___array___ArraySet___add(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t REGB0;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 423;
+  fra.me.line = 466;
   fra.me.meth = LOCATE_standard___collection___array___ArraySet___add;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./../lib/standard//collection//array.nit:423 */
+  /* ../lib/standard/collection/array.nit:466 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 423);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 466);
   }
   fra.me.REG[2] = ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0]);
   REGB0 = CALL_standard___collection___abstract_collection___Collection___has(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[1]);
@@ -2766,7 +3198,7 @@ void standard___collection___array___ArraySet___add(val_t p0, val_t p1){
     REGB0 = TAG_Bool(ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0])!=NIT_NULL);
     if (UNTAG_Bool(REGB0)) {
     } else {
-      nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 423);
+      nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 466);
     }
     fra.me.REG[0] = ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0]);
     CALL_standard___collection___abstract_collection___SimpleCollection___add(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
@@ -2774,23 +3206,25 @@ void standard___collection___array___ArraySet___add(val_t p0, val_t p1){
   stack_frame_head = fra.me.prev;
   return;
 }
+static const char LOCATE_standard___collection___array___ArraySet___is_empty[] = "array::ArraySet::(abstract_collection::Collection::is_empty)";
 val_t standard___collection___array___ArraySet___is_empty(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 425;
+  fra.me.line = 468;
   fra.me.meth = LOCATE_standard___collection___array___ArraySet___is_empty;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:425 */
+  /* ../lib/standard/collection/array.nit:468 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 425);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 468);
   }
   fra.me.REG[0] = ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0]);
   REGB0 = CALL_standard___collection___abstract_collection___Collection___is_empty(fra.me.REG[0])(fra.me.REG[0]);
@@ -2799,80 +3233,90 @@ val_t standard___collection___array___ArraySet___is_empty(val_t p0){
   stack_frame_head = fra.me.prev;
   return REGB0;
 }
+static const char LOCATE_standard___collection___array___ArraySet___length[] = "array::ArraySet::(abstract_collection::Collection::length)";
 val_t standard___collection___array___ArraySet___length(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 427;
+  fra.me.line = 470;
   fra.me.meth = LOCATE_standard___collection___array___ArraySet___length;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:427 */
+  /* ../lib/standard/collection/array.nit:470 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 427);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 470);
   }
   fra.me.REG[0] = ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:23 */
+  /* ../lib/standard/collection/array.nit:24 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
   }
   REGB0 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:427 */
+  /* ../lib/standard/collection/array.nit:470 */
   goto label1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
   return REGB0;
 }
+static const char LOCATE_standard___collection___array___ArraySet___first[] = "array::ArraySet::(abstract_collection::Collection::first)";
 val_t standard___collection___array___ArraySet___first(val_t p0){
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
   val_t REGB1;
+  val_t REGB2;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 429;
+  fra.me.line = 472;
   fra.me.meth = LOCATE_standard___collection___array___ArraySet___first;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:431 */
+  /* ../lib/standard/collection/array.nit:474 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 431);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 474);
   }
   fra.me.REG[1] = ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:23 */
+  /* ../lib/standard/collection/array.nit:24 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[1])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
   }
   REGB0 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[1]);
-  /* ./../lib/standard//collection//array.nit:431 */
+  /* ../lib/standard/collection/array.nit:474 */
   REGB1 = TAG_Int(0);
-  /* ./../lib/standard//kernel.nit:217 */
+  REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+  if (UNTAG_Bool(REGB2)) {
+  } else {
+    nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+  }
+  /* ../lib/standard/kernel.nit:237 */
   REGB1 = TAG_Bool(UNTAG_Int(REGB0)>UNTAG_Int(REGB1));
-  /* ./../lib/standard//collection//array.nit:431 */
+  /* ../lib/standard/collection/array.nit:474 */
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Assert failed", NULL, LOCATE_standard___collection___array, 431);
+    nit_abort("Assert failed", NULL, LOCATE_standard___collection___array, 474);
   }
-  /* ./../lib/standard//collection//array.nit:432 */
+  /* ../lib/standard/collection/array.nit:475 */
   REGB1 = TAG_Bool(ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 432);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 475);
   }
   fra.me.REG[0] = ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0]);
   fra.me.REG[0] = CALL_standard___collection___abstract_collection___Collection___first(fra.me.REG[0])(fra.me.REG[0]);
@@ -2881,99 +3325,113 @@ val_t standard___collection___array___ArraySet___first(val_t p0){
   stack_frame_head = fra.me.prev;
   return fra.me.REG[0];
 }
+static const char LOCATE_standard___collection___array___ArraySet___remove[] = "array::ArraySet::(abstract_collection::RemovableCollection::remove)";
 void standard___collection___array___ArraySet___remove(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t REGB0;
   val_t REGB1;
+  val_t REGB2;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 435;
+  fra.me.line = 478;
   fra.me.meth = LOCATE_standard___collection___array___ArraySet___remove;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./../lib/standard//collection//array.nit:437 */
+  /* ../lib/standard/collection/array.nit:480 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 437);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 480);
   }
   fra.me.REG[2] = ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0]);
   REGB0 = CALL_standard___collection___abstract_collection___SequenceRead___index_of(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[1]);
-  /* ./../lib/standard//collection//array.nit:438 */
+  /* ../lib/standard/collection/array.nit:481 */
   REGB1 = TAG_Int(0);
-  /* ./../lib/standard//kernel.nit:216 */
+  REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+  if (UNTAG_Bool(REGB2)) {
+  } else {
+    nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+  }
+  /* ../lib/standard/kernel.nit:236 */
   REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-  /* ./../lib/standard//collection//array.nit:438 */
+  /* ../lib/standard/collection/array.nit:481 */
   if (UNTAG_Bool(REGB1)) {
     CALL_standard___collection___array___ArraySet___remove_at(fra.me.REG[0])(fra.me.REG[0], REGB0);
   }
   stack_frame_head = fra.me.prev;
   return;
 }
+static const char LOCATE_standard___collection___array___ArraySet___remove_all[] = "array::ArraySet::(abstract_collection::RemovableCollection::remove_all)";
 void standard___collection___array___ArraySet___remove_all(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 441;
+  fra.me.line = 484;
   fra.me.meth = LOCATE_standard___collection___array___ArraySet___remove_all;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./../lib/standard//collection//array.nit:441 */
+  /* ../lib/standard/collection/array.nit:484 */
   CALL_standard___collection___abstract_collection___RemovableCollection___remove(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
   stack_frame_head = fra.me.prev;
   return;
 }
+static const char LOCATE_standard___collection___array___ArraySet___clear[] = "array::ArraySet::(abstract_collection::RemovableCollection::clear)";
 void standard___collection___array___ArraySet___clear(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 443;
+  fra.me.line = 486;
   fra.me.meth = LOCATE_standard___collection___array___ArraySet___clear;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:443 */
+  /* ../lib/standard/collection/array.nit:486 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 443);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 486);
   }
   fra.me.REG[0] = ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0]);
   CALL_standard___collection___abstract_collection___RemovableCollection___clear(fra.me.REG[0])(fra.me.REG[0]);
   stack_frame_head = fra.me.prev;
   return;
 }
+static const char LOCATE_standard___collection___array___ArraySet___iterator[] = "array::ArraySet::(abstract_collection::Collection::iterator)";
 val_t standard___collection___array___ArraySet___iterator(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 445;
+  fra.me.line = 488;
   fra.me.meth = LOCATE_standard___collection___array___ArraySet___iterator;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:445 */
+  /* ../lib/standard/collection/array.nit:488 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 445);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 488);
   }
   fra.me.REG[0] = ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0]);
   fra.me.REG[0] = CALL_standard___collection___abstract_collection___Collection___iterator(fra.me.REG[0])(fra.me.REG[0]);
@@ -2983,6 +3441,7 @@ val_t standard___collection___array___ArraySet___iterator(val_t p0){
   stack_frame_head = fra.me.prev;
   return fra.me.REG[0];
 }
+static const char LOCATE_standard___collection___array___ArraySet___enlarge[] = "array::ArraySet::enlarge";
 void standard___collection___array___ArraySet___enlarge(val_t p0, val_t p1){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
@@ -2990,24 +3449,26 @@ void standard___collection___array___ArraySet___enlarge(val_t p0, val_t p1){
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 447;
+  fra.me.line = 490;
   fra.me.meth = LOCATE_standard___collection___array___ArraySet___enlarge;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
   REGB0 = p1;
-  /* ./../lib/standard//collection//array.nit:448 */
+  /* ../lib/standard/collection/array.nit:491 */
   REGB1 = TAG_Bool(ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 448);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 491);
   }
   fra.me.REG[0] = ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0]);
   CALL_standard___collection___array___AbstractArray___enlarge(fra.me.REG[0])(fra.me.REG[0], REGB0);
   stack_frame_head = fra.me.prev;
   return;
 }
+static const char LOCATE_standard___collection___array___ArraySet___remove_at[] = "array::ArraySet::remove_at";
 void standard___collection___array___ArraySet___remove_at(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t REGB0;
@@ -3015,102 +3476,109 @@ void standard___collection___array___ArraySet___remove_at(val_t p0, val_t p1){
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 450;
+  fra.me.line = 493;
   fra.me.meth = LOCATE_standard___collection___array___ArraySet___remove_at;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   REGB0 = p1;
-  /* ./../lib/standard//collection//array.nit:452 */
+  /* ../lib/standard/collection/array.nit:495 */
   REGB1 = TAG_Bool(ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 452);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 495);
   }
   fra.me.REG[1] = ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0]);
   REGB1 = TAG_Bool(ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 452);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 495);
   }
   fra.me.REG[2] = ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0]);
   fra.me.REG[2] = CALL_standard___collection___abstract_collection___SequenceRead___last(fra.me.REG[2])(fra.me.REG[2]);
-  CALL_standard___collection___abstract_collection___Map_____braeq(fra.me.REG[1])(fra.me.REG[1], REGB0, fra.me.REG[2]);
-  /* ./../lib/standard//collection//array.nit:453 */
+  CALL_standard___collection___abstract_collection___Sequence_____braeq(fra.me.REG[1])(fra.me.REG[1], REGB0, fra.me.REG[2]);
+  /* ../lib/standard/collection/array.nit:496 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 453);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 496);
   }
   fra.me.REG[0] = ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0]);
   CALL_standard___collection___abstract_collection___Sequence___pop(fra.me.REG[0])(fra.me.REG[0]);
   stack_frame_head = fra.me.prev;
   return;
 }
+static const char LOCATE_standard___collection___array___ArraySet___init[] = "array::ArraySet::init";
 void standard___collection___array___ArraySet___init(val_t p0, int* init_table){
-  int itpos7 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_standard___collection___array___ArraySet].i;
+  int itpos8 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_standard___collection___array___ArraySet].i;
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t tmp;
-  if (init_table[itpos7]) return;
+  if (init_table[itpos8]) return;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 456;
+  fra.me.line = 499;
   fra.me.meth = LOCATE_standard___collection___array___ArraySet___init;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:457 */
+  /* ../lib/standard/collection/array.nit:500 */
   fra.me.REG[1] = NEW_Array_standard___collection___array___Array___init();
   ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0]) = fra.me.REG[1];
   stack_frame_head = fra.me.prev;
-  init_table[itpos7] = 1;
+  init_table[itpos8] = 1;
   return;
 }
+static const char LOCATE_standard___collection___array___ArraySet___with_capacity[] = "array::ArraySet::with_capacity";
 void standard___collection___array___ArraySet___with_capacity(val_t p0, val_t p1, int* init_table){
-  int itpos8 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_standard___collection___array___ArraySet].i;
+  int itpos9 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_standard___collection___array___ArraySet].i;
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
   val_t tmp;
-  if (init_table[itpos8]) return;
+  if (init_table[itpos9]) return;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 459;
+  fra.me.line = 502;
   fra.me.meth = LOCATE_standard___collection___array___ArraySet___with_capacity;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   REGB0 = p1;
-  /* ./../lib/standard//collection//array.nit:460 */
+  /* ../lib/standard/collection/array.nit:503 */
   fra.me.REG[1] = NEW_Array_standard___collection___array___Array___with_capacity(REGB0);
   ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0]) = fra.me.REG[1];
   stack_frame_head = fra.me.prev;
-  init_table[itpos8] = 1;
+  init_table[itpos9] = 1;
   return;
 }
+static const char LOCATE_standard___collection___array___ArraySetIterator___is_ok[] = "array::ArraySetIterator::(abstract_collection::Iterator::is_ok)";
 val_t standard___collection___array___ArraySetIterator___is_ok(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 467;
+  fra.me.line = 510;
   fra.me.meth = LOCATE_standard___collection___array___ArraySetIterator___is_ok;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:467 */
+  /* ../lib/standard/collection/array.nit:510 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___ArraySetIterator____iter(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_iter", LOCATE_standard___collection___array, 467);
+    nit_abort("Uninitialized attribute %s", "_iter", LOCATE_standard___collection___array, 510);
   }
   fra.me.REG[0] = ATTR_standard___collection___array___ArraySetIterator____iter(fra.me.REG[0]);
   REGB0 = CALL_standard___collection___abstract_collection___Iterator___is_ok(fra.me.REG[0])(fra.me.REG[0]);
@@ -3119,46 +3587,50 @@ val_t standard___collection___array___ArraySetIterator___is_ok(val_t p0){
   stack_frame_head = fra.me.prev;
   return REGB0;
 }
+static const char LOCATE_standard___collection___array___ArraySetIterator___next[] = "array::ArraySetIterator::(abstract_collection::Iterator::next)";
 void standard___collection___array___ArraySetIterator___next(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 469;
+  fra.me.line = 512;
   fra.me.meth = LOCATE_standard___collection___array___ArraySetIterator___next;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:469 */
+  /* ../lib/standard/collection/array.nit:512 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___ArraySetIterator____iter(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_iter", LOCATE_standard___collection___array, 469);
+    nit_abort("Uninitialized attribute %s", "_iter", LOCATE_standard___collection___array, 512);
   }
   fra.me.REG[0] = ATTR_standard___collection___array___ArraySetIterator____iter(fra.me.REG[0]);
   CALL_standard___collection___abstract_collection___Iterator___next(fra.me.REG[0])(fra.me.REG[0]);
   stack_frame_head = fra.me.prev;
   return;
 }
+static const char LOCATE_standard___collection___array___ArraySetIterator___item[] = "array::ArraySetIterator::(abstract_collection::Iterator::item)";
 val_t standard___collection___array___ArraySetIterator___item(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 471;
+  fra.me.line = 514;
   fra.me.meth = LOCATE_standard___collection___array___ArraySetIterator___item;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:471 */
+  /* ../lib/standard/collection/array.nit:514 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___ArraySetIterator____iter(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_iter", LOCATE_standard___collection___array, 471);
+    nit_abort("Uninitialized attribute %s", "_iter", LOCATE_standard___collection___array, 514);
   }
   fra.me.REG[0] = ATTR_standard___collection___array___ArraySetIterator____iter(fra.me.REG[0]);
   fra.me.REG[0] = CALL_standard___collection___abstract_collection___Iterator___item(fra.me.REG[0])(fra.me.REG[0]);
@@ -3167,27 +3639,30 @@ val_t standard___collection___array___ArraySetIterator___item(val_t p0){
   stack_frame_head = fra.me.prev;
   return fra.me.REG[0];
 }
+static const char LOCATE_standard___collection___array___ArraySetIterator___init[] = "array::ArraySetIterator::init";
 void standard___collection___array___ArraySetIterator___init(val_t p0, val_t p1, int* init_table){
-  int itpos9 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_standard___collection___array___ArraySetIterator].i;
+  int itpos10 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_standard___collection___array___ArraySetIterator].i;
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t tmp;
-  if (init_table[itpos9]) return;
+  if (init_table[itpos10]) return;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 473;
+  fra.me.line = 516;
   fra.me.meth = LOCATE_standard___collection___array___ArraySetIterator___init;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./../lib/standard//collection//array.nit:473 */
+  /* ../lib/standard/collection/array.nit:516 */
   ATTR_standard___collection___array___ArraySetIterator____iter(fra.me.REG[0]) = fra.me.REG[1];
   stack_frame_head = fra.me.prev;
-  init_table[itpos9] = 1;
+  init_table[itpos10] = 1;
   return;
 }
+static const char LOCATE_standard___collection___array___ArrayMap_____bra[] = "array::ArrayMap::(abstract_collection::MapRead::[])";
 val_t standard___collection___array___ArrayMap_____bra(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
@@ -3196,78 +3671,95 @@ val_t standard___collection___array___ArrayMap_____bra(val_t p0, val_t p1){
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 483;
+  fra.me.line = 526;
   fra.me.meth = LOCATE_standard___collection___array___ArrayMap_____bra;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./../lib/standard//collection//array.nit:486 */
+  /* ../lib/standard/collection/array.nit:529 */
   REGB0 = CALL_standard___collection___array___ArrayMap___index(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
-  /* ./../lib/standard//collection//array.nit:487 */
+  /* ../lib/standard/collection/array.nit:530 */
   REGB1 = TAG_Int(0);
-  /* ./../lib/standard//kernel.nit:216 */
+  REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+  if (UNTAG_Bool(REGB2)) {
+  } else {
+    nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+  }
+  /* ../lib/standard/kernel.nit:236 */
   REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-  /* ./../lib/standard//collection//array.nit:487 */
+  /* ../lib/standard/collection/array.nit:530 */
   if (UNTAG_Bool(REGB1)) {
-    /* ./../lib/standard//collection//array.nit:488 */
+    /* ../lib/standard/collection/array.nit:531 */
     REGB1 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
     if (UNTAG_Bool(REGB1)) {
     } else {
-      nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 488);
+      nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 531);
     }
     fra.me.REG[0] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
-    /* ./../lib/standard//collection//array.nit:245 */
+    /* ../lib/standard/collection/array.nit:280 */
     REGB1 = TAG_Int(0);
-    /* ./../lib/standard//kernel.nit:216 */
+    REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+    }
+    /* ../lib/standard/kernel.nit:236 */
     REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-    /* ./../lib/standard//collection//array.nit:245 */
+    /* ../lib/standard/collection/array.nit:280 */
     if (UNTAG_Bool(REGB1)) {
       REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
       if (UNTAG_Bool(REGB1)) {
       } else {
-        nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 245);
+        nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 280);
       }
       REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-      /* ./../lib/standard//kernel.nit:215 */
+      REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+      if (UNTAG_Bool(REGB2)) {
+      } else {
+        nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+      }
+      /* ../lib/standard/kernel.nit:235 */
       REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
     } else {
-      /* ./../lib/standard//collection//array.nit:245 */
-      REGB2 = TAG_Bool(false);
+      /* ../lib/standard/collection/array.nit:280 */
+      REGB2 = TAG_Bool(0);
       REGB1 = REGB2;
     }
     if (UNTAG_Bool(REGB1)) {
     } else {
-      nit_abort("Assert %s  failed", "'index'", LOCATE_standard___collection___array, 245);
+      nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
     }
-    /* ./../lib/standard//collection//array.nit:246 */
+    /* ../lib/standard/collection/array.nit:281 */
     fra.me.REG[0] = ATTR_standard___collection___array___Array____items(fra.me.REG[0]);
     REGB1 = TAG_Bool(fra.me.REG[0]==NIT_NULL);
     if (UNTAG_Bool(REGB1)) {
-      nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 246);
+      nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 281);
     }
-    /* ./../lib/standard//collection//array.nit:654 */
+    /* ../lib/standard/collection/array.nit:724 */
     fra.me.REG[0] = ((Nit_NativeArray)fra.me.REG[0])->val[UNTAG_Int(REGB0)];
-    /* ./../lib/standard//collection//array.nit:246 */
+    /* ../lib/standard/collection/array.nit:281 */
     goto label1;
     label1: while(0);
-    /* ./../lib/standard//collection//array.nit:488 */
+    /* ../lib/standard/collection/array.nit:531 */
     REGB0 = TAG_Bool(fra.me.REG[0]==NIT_NULL);
     if (UNTAG_Bool(REGB0)) {
-      nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 488);
+      nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 531);
     }
     fra.me.REG[0] = CALL_standard___collection___abstract_collection___Couple___second(fra.me.REG[0])(fra.me.REG[0]);
     goto label2;
   } else {
-    /* ./../lib/standard//collection//array.nit:490 */
-    nit_abort("Aborted", NULL, LOCATE_standard___collection___array, 490);
+    /* ../lib/standard/collection/array.nit:533 */
+    nit_abort("Aborted", NULL, LOCATE_standard___collection___array, 533);
   }
   label2: while(0);
   stack_frame_head = fra.me.prev;
   return fra.me.REG[0];
 }
+static const char LOCATE_standard___collection___array___ArrayMap_____braeq[] = "array::ArrayMap::(abstract_collection::Map::[]=)";
 void standard___collection___array___ArrayMap_____braeq(val_t p0, val_t p1, val_t p2){
   struct {struct stack_frame_t me; val_t MORE_REG[3];} fra;
   val_t REGB0;
@@ -3276,10 +3768,11 @@ void standard___collection___array___ArrayMap_____braeq(val_t p0, val_t p1, val_
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 494;
+  fra.me.line = 537;
   fra.me.meth = LOCATE_standard___collection___array___ArrayMap_____braeq;
   fra.me.has_broke = 0;
   fra.me.REG_size = 4;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
@@ -3287,67 +3780,82 @@ void standard___collection___array___ArrayMap_____braeq(val_t p0, val_t p1, val_
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
   fra.me.REG[2] = p2;
-  /* ./../lib/standard//collection//array.nit:497 */
+  /* ../lib/standard/collection/array.nit:540 */
   REGB0 = CALL_standard___collection___array___ArrayMap___index(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
-  /* ./../lib/standard//collection//array.nit:498 */
+  /* ../lib/standard/collection/array.nit:541 */
   REGB1 = TAG_Int(0);
-  /* ./../lib/standard//kernel.nit:216 */
+  REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+  if (UNTAG_Bool(REGB2)) {
+  } else {
+    nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+  }
+  /* ../lib/standard/kernel.nit:236 */
   REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-  /* ./../lib/standard//collection//array.nit:498 */
+  /* ../lib/standard/collection/array.nit:541 */
   if (UNTAG_Bool(REGB1)) {
-    /* ./../lib/standard//collection//array.nit:499 */
+    /* ../lib/standard/collection/array.nit:542 */
     REGB1 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
     if (UNTAG_Bool(REGB1)) {
     } else {
-      nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 499);
+      nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 542);
     }
     fra.me.REG[3] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
-    /* ./../lib/standard//collection//array.nit:245 */
+    /* ../lib/standard/collection/array.nit:280 */
     REGB1 = TAG_Int(0);
-    /* ./../lib/standard//kernel.nit:216 */
+    REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+    }
+    /* ../lib/standard/kernel.nit:236 */
     REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-    /* ./../lib/standard//collection//array.nit:245 */
+    /* ../lib/standard/collection/array.nit:280 */
     if (UNTAG_Bool(REGB1)) {
       REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[3])!=NIT_NULL);
       if (UNTAG_Bool(REGB1)) {
       } else {
-        nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 245);
+        nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 280);
       }
       REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[3]);
-      /* ./../lib/standard//kernel.nit:215 */
+      REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+      if (UNTAG_Bool(REGB2)) {
+      } else {
+        nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+      }
+      /* ../lib/standard/kernel.nit:235 */
       REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
     } else {
-      /* ./../lib/standard//collection//array.nit:245 */
-      REGB2 = TAG_Bool(false);
+      /* ../lib/standard/collection/array.nit:280 */
+      REGB2 = TAG_Bool(0);
       REGB1 = REGB2;
     }
     if (UNTAG_Bool(REGB1)) {
     } else {
-      nit_abort("Assert %s  failed", "'index'", LOCATE_standard___collection___array, 245);
+      nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
     }
-    /* ./../lib/standard//collection//array.nit:246 */
+    /* ../lib/standard/collection/array.nit:281 */
     fra.me.REG[3] = ATTR_standard___collection___array___Array____items(fra.me.REG[3]);
     REGB1 = TAG_Bool(fra.me.REG[3]==NIT_NULL);
     if (UNTAG_Bool(REGB1)) {
-      nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 246);
+      nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 281);
     }
-    /* ./../lib/standard//collection//array.nit:654 */
+    /* ../lib/standard/collection/array.nit:724 */
     fra.me.REG[3] = ((Nit_NativeArray)fra.me.REG[3])->val[UNTAG_Int(REGB0)];
-    /* ./../lib/standard//collection//array.nit:246 */
+    /* ../lib/standard/collection/array.nit:281 */
     goto label1;
     label1: while(0);
-    /* ./../lib/standard//collection//array.nit:499 */
+    /* ../lib/standard/collection/array.nit:542 */
     REGB0 = TAG_Bool(fra.me.REG[3]==NIT_NULL);
     if (UNTAG_Bool(REGB0)) {
-      nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 499);
+      nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 542);
     }
     CALL_standard___collection___abstract_collection___Couple___second__eq(fra.me.REG[3])(fra.me.REG[3], fra.me.REG[2]);
   } else {
-    /* ./../lib/standard//collection//array.nit:501 */
+    /* ../lib/standard/collection/array.nit:544 */
     REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
     if (UNTAG_Bool(REGB0)) {
     } else {
-      nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 501);
+      nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 544);
     }
     fra.me.REG[0] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
     fra.me.REG[2] = NEW_Couple_standard___collection___abstract_collection___Couple___init(fra.me.REG[1], fra.me.REG[2]);
@@ -3356,1168 +3864,1840 @@ void standard___collection___array___ArrayMap_____braeq(val_t p0, val_t p1, val_
   stack_frame_head = fra.me.prev;
   return;
 }
-val_t standard___collection___array___ArrayMap___has_key(val_t p0, val_t p1){
-  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+static const char LOCATE_standard___collection___array___ArrayMap___keys[] = "array::ArrayMap::(abstract_collection::MapRead::keys)";
+val_t standard___collection___array___ArrayMap___keys(val_t p0){
+  struct {struct stack_frame_t me;} fra;
   val_t REGB0;
-  val_t REGB1;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 505;
-  fra.me.meth = LOCATE_standard___collection___array___ArrayMap___has_key;
+  fra.me.line = 548;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMap___keys;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ../lib/standard/collection/array.nit:548 */
+  REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayMap_____atkeys(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "@keys", LOCATE_standard___collection___array, 548);
+  }
+  fra.me.REG[0] = ATTR_standard___collection___array___ArrayMap_____atkeys(fra.me.REG[0]);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+static const char LOCATE_standard___collection___array___ArrayMap___keys__eq[] = "array::ArrayMap::keys=";
+void standard___collection___array___ArrayMap___keys__eq(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_standard___collection___array;
+  fra.me.line = 548;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMap___keys__eq;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./../lib/standard//collection//array.nit:506 */
-  REGB0 = CALL_standard___collection___array___ArrayMap___index(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
-  REGB1 = TAG_Int(0);
-  /* ./../lib/standard//kernel.nit:216 */
-  REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-  /* ./../lib/standard//collection//array.nit:506 */
-  goto label1;
-  label1: while(0);
+  /* ../lib/standard/collection/array.nit:548 */
+  ATTR_standard___collection___array___ArrayMap_____atkeys(fra.me.REG[0]) = fra.me.REG[1];
   stack_frame_head = fra.me.prev;
-  return REGB1;
+  return;
 }
-val_t standard___collection___array___ArrayMap___has(val_t p0, val_t p1){
-  struct {struct stack_frame_t me; val_t MORE_REG[3];} fra;
+static const char LOCATE_standard___collection___array___ArrayMap___values[] = "array::ArrayMap::(abstract_collection::MapRead::values)";
+val_t standard___collection___array___ArrayMap___values(val_t p0){
+  struct {struct stack_frame_t me;} fra;
   val_t REGB0;
-  val_t REGB1;
-  val_t REGB2;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 508;
-  fra.me.meth = LOCATE_standard___collection___array___ArrayMap___has;
+  fra.me.line = 549;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMap___values;
   fra.me.has_broke = 0;
-  fra.me.REG_size = 4;
+  fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
-  fra.me.REG[1] = NIT_NULL;
-  fra.me.REG[2] = NIT_NULL;
-  fra.me.REG[3] = NIT_NULL;
   fra.me.REG[0] = p0;
-  fra.me.REG[1] = p1;
-  /* ./../lib/standard//collection//array.nit:511 */
-  REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
+  /* ../lib/standard/collection/array.nit:549 */
+  REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayMap_____atvalues(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 511);
-  }
-  fra.me.REG[0] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:234 */
-  REGB0 = TAG_Int(0);
-  /* ./../lib/standard//collection//array.nit:235 */
-  REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
-  if (UNTAG_Bool(REGB1)) {
-  } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 235);
-  }
-  REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:236 */
-  fra.me.REG[2] = ATTR_standard___collection___array___Array____items(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:237 */
-  while(1) {
-    /* ./../lib/standard//collection//array.nit:23 */
-    REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
-    if (UNTAG_Bool(REGB1)) {
-    } else {
-      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
-    }
-    REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-    /* ./../lib/standard//kernel.nit:215 */
-    REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
-    /* ./../lib/standard//collection//array.nit:237 */
-    if (UNTAG_Bool(REGB1)) {
-      /* ./../lib/standard//collection//array.nit:238 */
-      REGB1 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
-      if (UNTAG_Bool(REGB1)) {
-        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 238);
-      }
-      /* ./../lib/standard//collection//array.nit:654 */
-      fra.me.REG[3] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB0)];
-      /* ./../lib/standard//collection//array.nit:511 */
-      fra.me.REG[3] = CALL_standard___collection___abstract_collection___Couple___second(fra.me.REG[3])(fra.me.REG[3]);
-      REGB1 = TAG_Bool(IS_EQUAL_NN(fra.me.REG[3],fra.me.REG[1]));
-      if (UNTAG_Bool(REGB1)) {
-      } else {
-        REGB2 = TAG_Bool(fra.me.REG[3]==NIT_NULL);
-        if (UNTAG_Bool(REGB2)) {
-          REGB2 = TAG_Bool(false);
-          REGB1 = REGB2;
-        } else {
-          REGB2 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[3])(fra.me.REG[3], fra.me.REG[1]);
-          REGB1 = REGB2;
-        }
-      }
-      if (UNTAG_Bool(REGB1)) {
-        REGB1 = TAG_Bool(true);
-        goto label1;
-      }
-      /* ./../lib/standard//collection//array.nit:239 */
-      REGB2 = TAG_Int(1);
-      /* ./../lib/standard//kernel.nit:218 */
-      REGB2 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB2));
-      /* ./../lib/standard//collection//array.nit:239 */
-      REGB0 = REGB2;
-    } else {
-      /* ./../lib/standard//collection//array.nit:237 */
-      goto label2;
-    }
+    nit_abort("Uninitialized attribute %s", "@values", LOCATE_standard___collection___array, 549);
   }
-  label2: while(0);
-  /* ./../lib/standard//collection//array.nit:512 */
-  REGB0 = TAG_Bool(false);
-  REGB1 = REGB0;
-  goto label1;
-  label1: while(0);
+  fra.me.REG[0] = ATTR_standard___collection___array___ArrayMap_____atvalues(fra.me.REG[0]);
   stack_frame_head = fra.me.prev;
-  return REGB1;
+  return fra.me.REG[0];
 }
-val_t standard___collection___array___ArrayMap___has_only(val_t p0, val_t p1){
-  struct {struct stack_frame_t me; val_t MORE_REG[3];} fra;
-  val_t REGB0;
-  val_t REGB1;
-  val_t REGB2;
+static const char LOCATE_standard___collection___array___ArrayMap___values__eq[] = "array::ArrayMap::values=";
+void standard___collection___array___ArrayMap___values__eq(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 515;
-  fra.me.meth = LOCATE_standard___collection___array___ArrayMap___has_only;
+  fra.me.line = 549;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMap___values__eq;
   fra.me.has_broke = 0;
-  fra.me.REG_size = 4;
+  fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
-  fra.me.REG[2] = NIT_NULL;
-  fra.me.REG[3] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./../lib/standard//collection//array.nit:518 */
-  REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
-  if (UNTAG_Bool(REGB0)) {
-  } else {
-    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 518);
-  }
-  fra.me.REG[0] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:234 */
-  REGB0 = TAG_Int(0);
-  /* ./../lib/standard//collection//array.nit:235 */
-  REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
-  if (UNTAG_Bool(REGB1)) {
-  } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 235);
-  }
-  REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:236 */
-  fra.me.REG[2] = ATTR_standard___collection___array___Array____items(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:237 */
-  while(1) {
-    /* ./../lib/standard//collection//array.nit:23 */
-    REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
-    if (UNTAG_Bool(REGB1)) {
-    } else {
-      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
-    }
-    REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-    /* ./../lib/standard//kernel.nit:215 */
-    REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
-    /* ./../lib/standard//collection//array.nit:237 */
-    if (UNTAG_Bool(REGB1)) {
-      /* ./../lib/standard//collection//array.nit:238 */
-      REGB1 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
-      if (UNTAG_Bool(REGB1)) {
-        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 238);
-      }
-      /* ./../lib/standard//collection//array.nit:654 */
-      fra.me.REG[3] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB0)];
-      /* ./../lib/standard//collection//array.nit:518 */
-      fra.me.REG[3] = CALL_standard___collection___abstract_collection___Couple___second(fra.me.REG[3])(fra.me.REG[3]);
-      REGB1 = TAG_Bool(IS_EQUAL_NN(fra.me.REG[3],fra.me.REG[1]));
-      if (UNTAG_Bool(REGB1)) {
-      } else {
-        REGB2 = TAG_Bool(fra.me.REG[3]==NIT_NULL);
-        if (UNTAG_Bool(REGB2)) {
-          REGB2 = TAG_Bool(false);
-          REGB1 = REGB2;
-        } else {
-          REGB2 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[3])(fra.me.REG[3], fra.me.REG[1]);
-          REGB1 = REGB2;
-        }
-      }
-      REGB1 = TAG_Bool(!UNTAG_Bool(REGB1));
-      if (UNTAG_Bool(REGB1)) {
-        REGB1 = TAG_Bool(false);
-        goto label1;
-      }
-      /* ./../lib/standard//collection//array.nit:239 */
-      REGB2 = TAG_Int(1);
-      /* ./../lib/standard//kernel.nit:218 */
-      REGB2 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB2));
-      /* ./../lib/standard//collection//array.nit:239 */
-      REGB0 = REGB2;
-    } else {
-      /* ./../lib/standard//collection//array.nit:237 */
-      goto label2;
-    }
-  }
-  label2: while(0);
-  /* ./../lib/standard//collection//array.nit:519 */
-  REGB0 = TAG_Bool(true);
-  REGB1 = REGB0;
-  goto label1;
-  label1: while(0);
+  /* ../lib/standard/collection/array.nit:549 */
+  ATTR_standard___collection___array___ArrayMap_____atvalues(fra.me.REG[0]) = fra.me.REG[1];
   stack_frame_head = fra.me.prev;
-  return REGB1;
+  return;
 }
+static const char LOCATE_standard___collection___array___ArrayMap___length[] = "array::ArrayMap::(abstract_collection::MapRead::length)";
 val_t standard___collection___array___ArrayMap___length(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 522;
+  fra.me.line = 551;
   fra.me.meth = LOCATE_standard___collection___array___ArrayMap___length;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:523 */
+  /* ../lib/standard/collection/array.nit:552 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 523);
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 552);
   }
   fra.me.REG[0] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:23 */
+  /* ../lib/standard/collection/array.nit:24 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
   }
   REGB0 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:523 */
+  /* ../lib/standard/collection/array.nit:552 */
   goto label1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
   return REGB0;
 }
-val_t standard___collection___array___ArrayMap___first(val_t p0){
+static const char LOCATE_standard___collection___array___ArrayMap___iterator[] = "array::ArrayMap::(abstract_collection::MapRead::iterator)";
+val_t standard___collection___array___ArrayMap___iterator(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 525;
-  fra.me.meth = LOCATE_standard___collection___array___ArrayMap___first;
+  fra.me.line = 554;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMap___iterator;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:525 */
+  /* ../lib/standard/collection/array.nit:554 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 525);
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 554);
   }
   fra.me.REG[0] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
-  fra.me.REG[0] = CALL_standard___collection___abstract_collection___Collection___first(fra.me.REG[0])(fra.me.REG[0]);
-  REGB0 = TAG_Bool(fra.me.REG[0]==NIT_NULL);
-  if (UNTAG_Bool(REGB0)) {
-    nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 525);
-  }
-  fra.me.REG[0] = CALL_standard___collection___abstract_collection___Couple___second(fra.me.REG[0])(fra.me.REG[0]);
+  fra.me.REG[0] = CALL_standard___collection___abstract_collection___Collection___iterator(fra.me.REG[0])(fra.me.REG[0]);
+  fra.me.REG[0] = NEW_CoupleMapIterator_standard___collection___abstract_collection___CoupleMapIterator___init(fra.me.REG[0]);
   goto label1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
   return fra.me.REG[0];
 }
-val_t standard___collection___array___ArrayMap___count(val_t p0, val_t p1){
-  struct {struct stack_frame_t me; val_t MORE_REG[3];} fra;
+static const char LOCATE_standard___collection___array___ArrayMap___is_empty[] = "array::ArrayMap::(abstract_collection::MapRead::is_empty)";
+val_t standard___collection___array___ArrayMap___is_empty(val_t p0){
+  struct {struct stack_frame_t me;} fra;
   val_t REGB0;
-  val_t REGB1;
-  val_t REGB2;
-  val_t REGB3;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 527;
-  fra.me.meth = LOCATE_standard___collection___array___ArrayMap___count;
+  fra.me.line = 556;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMap___is_empty;
   fra.me.has_broke = 0;
-  fra.me.REG_size = 4;
+  fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
-  fra.me.REG[1] = NIT_NULL;
-  fra.me.REG[2] = NIT_NULL;
-  fra.me.REG[3] = NIT_NULL;
   fra.me.REG[0] = p0;
-  fra.me.REG[1] = p1;
-  /* ./../lib/standard//collection//array.nit:530 */
-  REGB0 = TAG_Int(0);
-  /* ./../lib/standard//collection//array.nit:531 */
-  REGB1 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
-  if (UNTAG_Bool(REGB1)) {
+  /* ../lib/standard/collection/array.nit:556 */
+  REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 531);
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 556);
   }
   fra.me.REG[0] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:234 */
-  REGB1 = TAG_Int(0);
-  /* ./../lib/standard//collection//array.nit:235 */
-  REGB2 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
-  if (UNTAG_Bool(REGB2)) {
-  } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 235);
-  }
-  REGB2 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:236 */
-  fra.me.REG[2] = ATTR_standard___collection___array___Array____items(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:237 */
-  while(1) {
-    /* ./../lib/standard//collection//array.nit:23 */
-    REGB2 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
-    if (UNTAG_Bool(REGB2)) {
-    } else {
-      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
-    }
-    REGB2 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-    /* ./../lib/standard//kernel.nit:215 */
-    REGB2 = TAG_Bool(UNTAG_Int(REGB1)<UNTAG_Int(REGB2));
-    /* ./../lib/standard//collection//array.nit:237 */
-    if (UNTAG_Bool(REGB2)) {
-      /* ./../lib/standard//collection//array.nit:238 */
-      REGB2 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
-      if (UNTAG_Bool(REGB2)) {
-        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 238);
-      }
-      /* ./../lib/standard//collection//array.nit:654 */
-      fra.me.REG[3] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB1)];
-      /* ./../lib/standard//collection//array.nit:531 */
-      fra.me.REG[3] = CALL_standard___collection___abstract_collection___Couple___second(fra.me.REG[3])(fra.me.REG[3]);
-      REGB2 = TAG_Bool(IS_EQUAL_NN(fra.me.REG[3],fra.me.REG[1]));
-      if (UNTAG_Bool(REGB2)) {
-      } else {
-        REGB3 = TAG_Bool(fra.me.REG[3]==NIT_NULL);
-        if (UNTAG_Bool(REGB3)) {
-          REGB3 = TAG_Bool(false);
-          REGB2 = REGB3;
-        } else {
-          REGB3 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[3])(fra.me.REG[3], fra.me.REG[1]);
-          REGB2 = REGB3;
-        }
-      }
-      if (UNTAG_Bool(REGB2)) {
-        REGB2 = TAG_Int(1);
-        /* ./../lib/standard//kernel.nit:218 */
-        REGB2 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB2));
-        /* ./../lib/standard//collection//array.nit:531 */
-        REGB0 = REGB2;
-      }
-      /* ./../lib/standard//collection//array.nit:239 */
-      REGB2 = TAG_Int(1);
-      /* ./../lib/standard//kernel.nit:218 */
-      REGB2 = TAG_Int(UNTAG_Int(REGB1)+UNTAG_Int(REGB2));
-      /* ./../lib/standard//collection//array.nit:239 */
-      REGB1 = REGB2;
-    } else {
-      /* ./../lib/standard//collection//array.nit:237 */
-      goto label1;
-    }
-  }
+  REGB0 = CALL_standard___collection___abstract_collection___Collection___is_empty(fra.me.REG[0])(fra.me.REG[0]);
+  goto label1;
   label1: while(0);
-  /* ./../lib/standard//collection//array.nit:532 */
-  goto label2;
-  label2: while(0);
   stack_frame_head = fra.me.prev;
   return REGB0;
 }
-val_t standard___collection___array___ArrayMap___iterator(val_t p0){
+static const char LOCATE_standard___collection___array___ArrayMap___clear[] = "array::ArrayMap::(abstract_collection::Map::clear)";
+void standard___collection___array___ArrayMap___clear(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 535;
-  fra.me.meth = LOCATE_standard___collection___array___ArrayMap___iterator;
+  fra.me.line = 558;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMap___clear;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:535 */
+  /* ../lib/standard/collection/array.nit:558 */
   REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 535);
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 558);
   }
   fra.me.REG[0] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
-  fra.me.REG[0] = CALL_standard___collection___abstract_collection___Collection___iterator(fra.me.REG[0])(fra.me.REG[0]);
-  fra.me.REG[0] = NEW_CoupleMapIterator_standard___collection___abstract_collection___CoupleMapIterator___init(fra.me.REG[0]);
-  goto label1;
-  label1: while(0);
+  CALL_standard___collection___abstract_collection___RemovableCollection___clear(fra.me.REG[0])(fra.me.REG[0]);
   stack_frame_head = fra.me.prev;
-  return fra.me.REG[0];
+  return;
 }
-val_t standard___collection___array___ArrayMap___is_empty(val_t p0){
+static const char LOCATE_standard___collection___array___ArrayMap___enlarge[] = "array::ArrayMap::enlarge";
+void standard___collection___array___ArrayMap___enlarge(val_t p0, val_t p1){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
+  val_t REGB1;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 537;
-  fra.me.meth = LOCATE_standard___collection___array___ArrayMap___is_empty;
+  fra.me.line = 560;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMap___enlarge;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:537 */
-  REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
-  if (UNTAG_Bool(REGB0)) {
+  REGB0 = p1;
+  /* ../lib/standard/collection/array.nit:561 */
+  REGB1 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 537);
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 561);
   }
   fra.me.REG[0] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
-  REGB0 = CALL_standard___collection___abstract_collection___Collection___is_empty(fra.me.REG[0])(fra.me.REG[0]);
-  goto label1;
-  label1: while(0);
+  CALL_standard___collection___array___AbstractArray___enlarge(fra.me.REG[0])(fra.me.REG[0], REGB0);
   stack_frame_head = fra.me.prev;
-  return REGB0;
+  return;
 }
-void standard___collection___array___ArrayMap___remove(val_t p0, val_t p1){
-  struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
+static const char LOCATE_standard___collection___array___ArrayMap___couple_at[] = "array::ArrayMap::(abstract_collection::CoupleMap::couple_at)";
+val_t standard___collection___array___ArrayMap___couple_at(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
   val_t REGB1;
   val_t REGB2;
-  val_t REGB3;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 539;
-  fra.me.meth = LOCATE_standard___collection___array___ArrayMap___remove;
+  fra.me.line = 563;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMap___couple_at;
   fra.me.has_broke = 0;
-  fra.me.REG_size = 3;
+  fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
-  fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./../lib/standard//collection//array.nit:541 */
-  REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
-  if (UNTAG_Bool(REGB0)) {
-  } else {
-    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 541);
-  }
-  fra.me.REG[2] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:23 */
-  REGB0 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
-  if (UNTAG_Bool(REGB0)) {
+  /* ../lib/standard/collection/array.nit:565 */
+  REGB0 = CALL_standard___collection___array___ArrayMap___index(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+  /* ../lib/standard/collection/array.nit:566 */
+  REGB1 = TAG_Int(0);
+  REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+  if (UNTAG_Bool(REGB2)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+    nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
   }
-  REGB0 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
-  /* ./../lib/standard//collection//array.nit:541 */
-  REGB1 = TAG_Int(1);
-  /* ./../lib/standard//kernel.nit:220 */
-  REGB1 = TAG_Int(UNTAG_Int(REGB0)-UNTAG_Int(REGB1));
-  /* ./../lib/standard//collection//array.nit:542 */
-  while(1) {
-    REGB0 = TAG_Int(0);
-    /* ./../lib/standard//kernel.nit:216 */
-    REGB0 = TAG_Bool(UNTAG_Int(REGB1)>=UNTAG_Int(REGB0));
-    /* ./../lib/standard//collection//array.nit:542 */
-    if (UNTAG_Bool(REGB0)) {
-      /* ./../lib/standard//collection//array.nit:543 */
-      REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
-      if (UNTAG_Bool(REGB0)) {
-      } else {
-        nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 543);
-      }
-      fra.me.REG[2] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
-      /* ./../lib/standard//collection//array.nit:243 */
-      REGB0 = REGB1;
-      /* ./../lib/standard//collection//array.nit:245 */
-      REGB2 = TAG_Int(0);
-      /* ./../lib/standard//kernel.nit:216 */
-      REGB2 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB2));
-      /* ./../lib/standard//collection//array.nit:245 */
-      if (UNTAG_Bool(REGB2)) {
-        REGB2 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
-        if (UNTAG_Bool(REGB2)) {
-        } else {
-          nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 245);
-        }
-        REGB2 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
-        /* ./../lib/standard//kernel.nit:215 */
-        REGB2 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB2));
-      } else {
-        /* ./../lib/standard//collection//array.nit:245 */
-        REGB3 = TAG_Bool(false);
-        REGB2 = REGB3;
-      }
-      if (UNTAG_Bool(REGB2)) {
+  /* ../lib/standard/kernel.nit:236 */
+  REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
+  /* ../lib/standard/collection/array.nit:566 */
+  if (UNTAG_Bool(REGB1)) {
+    /* ../lib/standard/collection/array.nit:567 */
+    REGB1 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
+    if (UNTAG_Bool(REGB1)) {
+    } else {
+      nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 567);
+    }
+    fra.me.REG[0] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
+    /* ../lib/standard/collection/array.nit:280 */
+    REGB1 = TAG_Int(0);
+    REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+    }
+    /* ../lib/standard/kernel.nit:236 */
+    REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
+    /* ../lib/standard/collection/array.nit:280 */
+    if (UNTAG_Bool(REGB1)) {
+      REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
+      if (UNTAG_Bool(REGB1)) {
       } else {
-        nit_abort("Assert %s  failed", "'index'", LOCATE_standard___collection___array, 245);
+        nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 280);
       }
-      /* ./../lib/standard//collection//array.nit:246 */
-      fra.me.REG[2] = ATTR_standard___collection___array___Array____items(fra.me.REG[2]);
-      REGB2 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
+      REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
+      REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
       if (UNTAG_Bool(REGB2)) {
-        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 246);
-      }
-      /* ./../lib/standard//collection//array.nit:654 */
-      fra.me.REG[2] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB0)];
-      /* ./../lib/standard//collection//array.nit:246 */
-      goto label1;
-      label1: while(0);
-      /* ./../lib/standard//collection//array.nit:543 */
-      REGB0 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
-      if (UNTAG_Bool(REGB0)) {
-        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 543);
-      }
-      fra.me.REG[2] = CALL_standard___collection___abstract_collection___Couple___second(fra.me.REG[2])(fra.me.REG[2]);
-      REGB0 = TAG_Bool(IS_EQUAL_NN(fra.me.REG[2],fra.me.REG[1]));
-      if (UNTAG_Bool(REGB0)) {
       } else {
-        REGB2 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
-        if (UNTAG_Bool(REGB2)) {
-          REGB2 = TAG_Bool(false);
-          REGB0 = REGB2;
-        } else {
-          REGB2 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[1]);
-          REGB0 = REGB2;
-        }
+        nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
       }
-      if (UNTAG_Bool(REGB0)) {
-        /* ./../lib/standard//collection//array.nit:544 */
-        CALL_standard___collection___array___ArrayMap___remove_at_index(fra.me.REG[0])(fra.me.REG[0], REGB1);
-        /* ./../lib/standard//collection//array.nit:545 */
-        goto label2;
-      }
-      /* ./../lib/standard//collection//array.nit:547 */
-      REGB0 = TAG_Int(1);
-      /* ./../lib/standard//kernel.nit:220 */
-      REGB0 = TAG_Int(UNTAG_Int(REGB1)-UNTAG_Int(REGB0));
-      /* ./../lib/standard//collection//array.nit:547 */
-      REGB1 = REGB0;
+      /* ../lib/standard/kernel.nit:235 */
+      REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
     } else {
-      /* ./../lib/standard//collection//array.nit:542 */
-      goto label3;
+      /* ../lib/standard/collection/array.nit:280 */
+      REGB2 = TAG_Bool(0);
+      REGB1 = REGB2;
+    }
+    if (UNTAG_Bool(REGB1)) {
+    } else {
+      nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
+    }
+    /* ../lib/standard/collection/array.nit:281 */
+    fra.me.REG[0] = ATTR_standard___collection___array___Array____items(fra.me.REG[0]);
+    REGB1 = TAG_Bool(fra.me.REG[0]==NIT_NULL);
+    if (UNTAG_Bool(REGB1)) {
+      nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 281);
     }
+    /* ../lib/standard/collection/array.nit:724 */
+    fra.me.REG[0] = ((Nit_NativeArray)fra.me.REG[0])->val[UNTAG_Int(REGB0)];
+    /* ../lib/standard/collection/array.nit:281 */
+    goto label1;
+    label1: while(0);
+    /* ../lib/standard/collection/array.nit:567 */
+    goto label2;
+  } else {
+    /* ../lib/standard/collection/array.nit:569 */
+    fra.me.REG[0] = NIT_NULL;
+    goto label2;
   }
-  label3: while(0);
   label2: while(0);
   stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+static const char LOCATE_standard___collection___array___ArrayMap___remove_at_index[] = "array::ArrayMap::remove_at_index";
+void standard___collection___array___ArrayMap___remove_at_index(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_standard___collection___array;
+  fra.me.line = 576;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMap___remove_at_index;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  REGB0 = p1;
+  /* ../lib/standard/collection/array.nit:579 */
+  REGB1 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB1)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 579);
+  }
+  fra.me.REG[1] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
+  REGB1 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB1)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 579);
+  }
+  fra.me.REG[2] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
+  fra.me.REG[2] = CALL_standard___collection___abstract_collection___SequenceRead___last(fra.me.REG[2])(fra.me.REG[2]);
+  CALL_standard___collection___abstract_collection___Sequence_____braeq(fra.me.REG[1])(fra.me.REG[1], REGB0, fra.me.REG[2]);
+  /* ../lib/standard/collection/array.nit:580 */
+  REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 580);
+  }
+  fra.me.REG[0] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
+  CALL_standard___collection___abstract_collection___Sequence___pop(fra.me.REG[0])(fra.me.REG[0]);
+  stack_frame_head = fra.me.prev;
   return;
 }
-void standard___collection___array___ArrayMap___remove_all(val_t p0, val_t p1){
+static const char LOCATE_standard___collection___array___ArrayMap___index[] = "array::ArrayMap::index";
+val_t standard___collection___array___ArrayMap___index(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t REGB0;
   val_t REGB1;
   val_t REGB2;
   val_t REGB3;
+  val_t REGB4;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 551;
-  fra.me.meth = LOCATE_standard___collection___array___ArrayMap___remove_all;
+  fra.me.line = 586;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMap___index;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./../lib/standard//collection//array.nit:553 */
-  REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
+  /* ../lib/standard/collection/array.nit:590 */
+  REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____last_index(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 553);
+    nit_abort("Uninitialized attribute %s", "_last_index", LOCATE_standard___collection___array, 590);
+  }
+  REGB0 = ATTR_standard___collection___array___ArrayMap____last_index(fra.me.REG[0]);
+  /* ../lib/standard/collection/array.nit:591 */
+  REGB1 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB1)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 591);
   }
   fra.me.REG[2] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:23 */
-  REGB0 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
-  if (UNTAG_Bool(REGB0)) {
+  /* ../lib/standard/collection/array.nit:24 */
+  REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
+  if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
   }
-  REGB0 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
-  /* ./../lib/standard//collection//array.nit:553 */
-  REGB1 = TAG_Int(1);
-  /* ./../lib/standard//kernel.nit:220 */
-  REGB1 = TAG_Int(UNTAG_Int(REGB0)-UNTAG_Int(REGB1));
-  /* ./../lib/standard//collection//array.nit:554 */
-  while(1) {
-    REGB0 = TAG_Int(0);
-    /* ./../lib/standard//kernel.nit:216 */
-    REGB0 = TAG_Bool(UNTAG_Int(REGB1)>=UNTAG_Int(REGB0));
-    /* ./../lib/standard//collection//array.nit:554 */
-    if (UNTAG_Bool(REGB0)) {
-      /* ./../lib/standard//collection//array.nit:555 */
-      REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
-      if (UNTAG_Bool(REGB0)) {
-      } else {
-        nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 555);
-      }
-      fra.me.REG[2] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
-      /* ./../lib/standard//collection//array.nit:243 */
-      REGB0 = REGB1;
-      /* ./../lib/standard//collection//array.nit:245 */
-      REGB2 = TAG_Int(0);
-      /* ./../lib/standard//kernel.nit:216 */
-      REGB2 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB2));
-      /* ./../lib/standard//collection//array.nit:245 */
-      if (UNTAG_Bool(REGB2)) {
-        REGB2 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
-        if (UNTAG_Bool(REGB2)) {
-        } else {
-          nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 245);
-        }
-        REGB2 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
-        /* ./../lib/standard//kernel.nit:215 */
-        REGB2 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB2));
-      } else {
-        /* ./../lib/standard//collection//array.nit:245 */
-        REGB3 = TAG_Bool(false);
-        REGB2 = REGB3;
-      }
-      if (UNTAG_Bool(REGB2)) {
-      } else {
-        nit_abort("Assert %s  failed", "'index'", LOCATE_standard___collection___array, 245);
-      }
-      /* ./../lib/standard//collection//array.nit:246 */
-      fra.me.REG[2] = ATTR_standard___collection___array___Array____items(fra.me.REG[2]);
+  REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
+  REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+  if (UNTAG_Bool(REGB2)) {
+  } else {
+    nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+  }
+  /* ../lib/standard/kernel.nit:235 */
+  REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
+  /* ../lib/standard/collection/array.nit:591 */
+  if (UNTAG_Bool(REGB1)) {
+    REGB1 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
+    if (UNTAG_Bool(REGB1)) {
+    } else {
+      nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 591);
+    }
+    fra.me.REG[2] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
+    /* ../lib/standard/collection/array.nit:278 */
+    REGB1 = REGB0;
+    /* ../lib/standard/collection/array.nit:280 */
+    REGB2 = TAG_Int(0);
+    REGB3 = TAG_Bool(VAL_ISA(REGB2, VTCOLOR_standard___kernel___Comparable___OTHER(REGB1), VTID_standard___kernel___Comparable___OTHER(REGB1))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB3)) {
+    } else {
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+    }
+    /* ../lib/standard/kernel.nit:236 */
+    REGB2 = TAG_Bool(UNTAG_Int(REGB1)>=UNTAG_Int(REGB2));
+    /* ../lib/standard/collection/array.nit:280 */
+    if (UNTAG_Bool(REGB2)) {
+      REGB2 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
+      if (UNTAG_Bool(REGB2)) {
+      } else {
+        nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 280);
+      }
+      REGB2 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
+      REGB3 = TAG_Bool(VAL_ISA(REGB2, VTCOLOR_standard___kernel___Comparable___OTHER(REGB1), VTID_standard___kernel___Comparable___OTHER(REGB1))) /*cast OTHER*/;
+      if (UNTAG_Bool(REGB3)) {
+      } else {
+        nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+      }
+      /* ../lib/standard/kernel.nit:235 */
+      REGB2 = TAG_Bool(UNTAG_Int(REGB1)<UNTAG_Int(REGB2));
+    } else {
+      /* ../lib/standard/collection/array.nit:280 */
+      REGB3 = TAG_Bool(0);
+      REGB2 = REGB3;
+    }
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
+    }
+    /* ../lib/standard/collection/array.nit:281 */
+    fra.me.REG[2] = ATTR_standard___collection___array___Array____items(fra.me.REG[2]);
+    REGB2 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
+    if (UNTAG_Bool(REGB2)) {
+      nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 281);
+    }
+    /* ../lib/standard/collection/array.nit:724 */
+    fra.me.REG[2] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB1)];
+    /* ../lib/standard/collection/array.nit:281 */
+    goto label1;
+    label1: while(0);
+    /* ../lib/standard/collection/array.nit:591 */
+    REGB1 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
+    if (UNTAG_Bool(REGB1)) {
+      nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 591);
+    }
+    fra.me.REG[2] = CALL_standard___collection___abstract_collection___Couple___first(fra.me.REG[2])(fra.me.REG[2]);
+    REGB1 = TAG_Bool(IS_EQUAL_ON(fra.me.REG[1],fra.me.REG[2]));
+    if (UNTAG_Bool(REGB1)) {
+    } else {
       REGB2 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
       if (UNTAG_Bool(REGB2)) {
-        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 246);
+        REGB2 = TAG_Bool(0);
+        REGB1 = REGB2;
+      } else {
+        REGB2 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[1]);
+        REGB1 = REGB2;
       }
-      /* ./../lib/standard//collection//array.nit:654 */
-      fra.me.REG[2] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB0)];
-      /* ./../lib/standard//collection//array.nit:246 */
-      goto label1;
-      label1: while(0);
-      /* ./../lib/standard//collection//array.nit:555 */
-      REGB0 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
-      if (UNTAG_Bool(REGB0)) {
-        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 555);
+    }
+  } else {
+    REGB2 = TAG_Bool(0);
+    REGB1 = REGB2;
+  }
+  if (UNTAG_Bool(REGB1)) {
+    goto label2;
+  }
+  /* ../lib/standard/collection/array.nit:593 */
+  REGB1 = TAG_Int(0);
+  /* ../lib/standard/collection/array.nit:594 */
+  while(1) {
+    REGB2 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 594);
+    }
+    fra.me.REG[2] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
+    /* ../lib/standard/collection/array.nit:24 */
+    REGB2 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
+    }
+    REGB2 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
+    REGB3 = TAG_Bool(VAL_ISA(REGB2, VTCOLOR_standard___kernel___Comparable___OTHER(REGB1), VTID_standard___kernel___Comparable___OTHER(REGB1))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB3)) {
+    } else {
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+    }
+    /* ../lib/standard/kernel.nit:235 */
+    REGB2 = TAG_Bool(UNTAG_Int(REGB1)<UNTAG_Int(REGB2));
+    /* ../lib/standard/collection/array.nit:594 */
+    if (UNTAG_Bool(REGB2)) {
+      /* ../lib/standard/collection/array.nit:595 */
+      REGB2 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
+      if (UNTAG_Bool(REGB2)) {
+      } else {
+        nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 595);
       }
-      fra.me.REG[2] = CALL_standard___collection___abstract_collection___Couple___second(fra.me.REG[2])(fra.me.REG[2]);
-      REGB0 = TAG_Bool(IS_EQUAL_NN(fra.me.REG[2],fra.me.REG[1]));
-      if (UNTAG_Bool(REGB0)) {
+      fra.me.REG[2] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
+      /* ../lib/standard/collection/array.nit:278 */
+      REGB2 = REGB1;
+      /* ../lib/standard/collection/array.nit:280 */
+      REGB3 = TAG_Int(0);
+      REGB4 = TAG_Bool(VAL_ISA(REGB3, VTCOLOR_standard___kernel___Comparable___OTHER(REGB2), VTID_standard___kernel___Comparable___OTHER(REGB2))) /*cast OTHER*/;
+      if (UNTAG_Bool(REGB4)) {
       } else {
-        REGB2 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
-        if (UNTAG_Bool(REGB2)) {
-          REGB2 = TAG_Bool(false);
-          REGB0 = REGB2;
+        nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+      }
+      /* ../lib/standard/kernel.nit:236 */
+      REGB3 = TAG_Bool(UNTAG_Int(REGB2)>=UNTAG_Int(REGB3));
+      /* ../lib/standard/collection/array.nit:280 */
+      if (UNTAG_Bool(REGB3)) {
+        REGB3 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
+        if (UNTAG_Bool(REGB3)) {
         } else {
-          REGB2 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[1]);
-          REGB0 = REGB2;
+          nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 280);
         }
+        REGB3 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
+        REGB4 = TAG_Bool(VAL_ISA(REGB3, VTCOLOR_standard___kernel___Comparable___OTHER(REGB2), VTID_standard___kernel___Comparable___OTHER(REGB2))) /*cast OTHER*/;
+        if (UNTAG_Bool(REGB4)) {
+        } else {
+          nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+        }
+        /* ../lib/standard/kernel.nit:235 */
+        REGB3 = TAG_Bool(UNTAG_Int(REGB2)<UNTAG_Int(REGB3));
+      } else {
+        /* ../lib/standard/collection/array.nit:280 */
+        REGB4 = TAG_Bool(0);
+        REGB3 = REGB4;
       }
-      if (UNTAG_Bool(REGB0)) {
-        /* ./../lib/standard//collection//array.nit:556 */
-        CALL_standard___collection___array___ArrayMap___remove_at_index(fra.me.REG[0])(fra.me.REG[0], REGB1);
+      if (UNTAG_Bool(REGB3)) {
+      } else {
+        nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
       }
-      /* ./../lib/standard//collection//array.nit:558 */
-      REGB0 = TAG_Int(1);
-      /* ./../lib/standard//kernel.nit:220 */
-      REGB0 = TAG_Int(UNTAG_Int(REGB1)-UNTAG_Int(REGB0));
-      /* ./../lib/standard//collection//array.nit:558 */
-      REGB1 = REGB0;
+      /* ../lib/standard/collection/array.nit:281 */
+      fra.me.REG[2] = ATTR_standard___collection___array___Array____items(fra.me.REG[2]);
+      REGB3 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
+      if (UNTAG_Bool(REGB3)) {
+        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 281);
+      }
+      /* ../lib/standard/collection/array.nit:724 */
+      fra.me.REG[2] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB2)];
+      /* ../lib/standard/collection/array.nit:281 */
+      goto label3;
+      label3: while(0);
+      /* ../lib/standard/collection/array.nit:595 */
+      REGB2 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
+      if (UNTAG_Bool(REGB2)) {
+        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 595);
+      }
+      fra.me.REG[2] = CALL_standard___collection___abstract_collection___Couple___first(fra.me.REG[2])(fra.me.REG[2]);
+      REGB2 = TAG_Bool(IS_EQUAL_ON(fra.me.REG[1],fra.me.REG[2]));
+      if (UNTAG_Bool(REGB2)) {
+      } else {
+        REGB3 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
+        if (UNTAG_Bool(REGB3)) {
+          REGB3 = TAG_Bool(0);
+          REGB2 = REGB3;
+        } else {
+          REGB3 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[1]);
+          REGB2 = REGB3;
+        }
+      }
+      if (UNTAG_Bool(REGB2)) {
+        /* ../lib/standard/collection/array.nit:596 */
+        ATTR_standard___collection___array___ArrayMap____last_index(fra.me.REG[0]) = REGB1;
+        /* ../lib/standard/collection/array.nit:597 */
+        REGB0 = REGB1;
+        goto label2;
+      }
+      /* ../lib/standard/collection/array.nit:599 */
+      REGB2 = TAG_Int(1);
+      /* ../lib/standard/kernel.nit:238 */
+      REGB2 = TAG_Int(UNTAG_Int(REGB1)+UNTAG_Int(REGB2));
+      /* ../lib/standard/collection/array.nit:599 */
+      REGB1 = REGB2;
     } else {
-      /* ./../lib/standard//collection//array.nit:554 */
-      goto label2;
+      /* ../lib/standard/collection/array.nit:594 */
+      goto label4;
     }
   }
-  label2: while(0);
+  label4: while(0);
+  /* ../lib/standard/collection/array.nit:601 */
+  REGB1 = TAG_Int(1);
+  /* ../lib/standard/kernel.nit:239 */
+  REGB1 = TAG_Int(-UNTAG_Int(REGB1));
+  /* ../lib/standard/collection/array.nit:601 */
+  REGB0 = REGB1;
+  goto label2;
+  label2: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+static const char LOCATE_standard___collection___array___ArrayMap___init[] = "array::ArrayMap::init";
+void standard___collection___array___ArrayMap___init(val_t p0, int* init_table){
+  int itpos11 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_standard___collection___array___ArrayMap].i;
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t tmp;
+  if (init_table[itpos11]) return;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_standard___collection___array;
+  fra.me.line = 604;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMap___init;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ../lib/standard/collection/array.nit:607 */
+  fra.me.REG[1] = NEW_Array_standard___collection___array___Array___init();
+  ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]) = fra.me.REG[1];
+  stack_frame_head = fra.me.prev;
+  init_table[itpos11] = 1;
+  return;
+}
+static const char LOCATE_standard___collection___array___ArrayMapKeys___map[] = "array::ArrayMapKeys::map";
+val_t standard___collection___array___ArrayMapKeys___map(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_standard___collection___array;
+  fra.me.line = 613;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMapKeys___map;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ../lib/standard/collection/array.nit:613 */
+  REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayMapKeys_____atmap(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "@map", LOCATE_standard___collection___array, 613);
+  }
+  fra.me.REG[0] = ATTR_standard___collection___array___ArrayMapKeys_____atmap(fra.me.REG[0]);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+static const char LOCATE_standard___collection___array___ArrayMapKeys___map__eq[] = "array::ArrayMapKeys::map=";
+void standard___collection___array___ArrayMapKeys___map__eq(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_standard___collection___array;
+  fra.me.line = 613;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMapKeys___map__eq;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ../lib/standard/collection/array.nit:613 */
+  ATTR_standard___collection___array___ArrayMapKeys_____atmap(fra.me.REG[0]) = fra.me.REG[1];
+  stack_frame_head = fra.me.prev;
+  return;
+}
+static const char LOCATE_standard___collection___array___ArrayMapKeys___count[] = "array::ArrayMapKeys::(abstract_collection::Collection::count)";
+val_t standard___collection___array___ArrayMapKeys___count(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_standard___collection___array;
+  fra.me.line = 615;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMapKeys___count;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ../lib/standard/collection/array.nit:615 */
+  REGB0 = CALL_standard___collection___abstract_collection___Collection___has(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+  if (UNTAG_Bool(REGB0)) {
+    REGB0 = TAG_Int(1);
+    goto label1;
+  } else {
+    REGB1 = TAG_Int(0);
+    REGB0 = REGB1;
+    goto label1;
+  }
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+static const char LOCATE_standard___collection___array___ArrayMapKeys___first[] = "array::ArrayMapKeys::(abstract_collection::Collection::first)";
+val_t standard___collection___array___ArrayMapKeys___first(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_standard___collection___array;
+  fra.me.line = 616;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMapKeys___first;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ../lib/standard/collection/array.nit:616 */
+  fra.me.REG[0] = CALL_standard___collection___array___ArrayMapKeys___map(fra.me.REG[0])(fra.me.REG[0]);
+  REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 616);
+  }
+  fra.me.REG[0] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
+  fra.me.REG[0] = CALL_standard___collection___abstract_collection___Collection___first(fra.me.REG[0])(fra.me.REG[0]);
+  REGB0 = TAG_Bool(fra.me.REG[0]==NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+    nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 616);
+  }
+  fra.me.REG[0] = CALL_standard___collection___abstract_collection___Couple___first(fra.me.REG[0])(fra.me.REG[0]);
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+static const char LOCATE_standard___collection___array___ArrayMapKeys___has[] = "array::ArrayMapKeys::(abstract_collection::Collection::has)";
+val_t standard___collection___array___ArrayMapKeys___has(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t REGB2;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_standard___collection___array;
+  fra.me.line = 617;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMapKeys___has;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ../lib/standard/collection/array.nit:617 */
+  fra.me.REG[0] = CALL_standard___collection___array___ArrayMapKeys___map(fra.me.REG[0])(fra.me.REG[0]);
+  REGB0 = CALL_standard___collection___array___ArrayMap___index(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+  REGB1 = TAG_Int(0);
+  REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+  if (UNTAG_Bool(REGB2)) {
+  } else {
+    nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+  }
+  /* ../lib/standard/kernel.nit:236 */
+  REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
+  /* ../lib/standard/collection/array.nit:617 */
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB1;
+}
+static const char LOCATE_standard___collection___array___ArrayMapKeys___has_only[] = "array::ArrayMapKeys::(abstract_collection::Collection::has_only)";
+val_t standard___collection___array___ArrayMapKeys___has_only(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t REGB2;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_standard___collection___array;
+  fra.me.line = 618;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMapKeys___has_only;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ../lib/standard/collection/array.nit:618 */
+  REGB0 = CALL_standard___collection___abstract_collection___Collection___has(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+  if (UNTAG_Bool(REGB0)) {
+    REGB0 = CALL_standard___collection___abstract_collection___Collection___length(fra.me.REG[0])(fra.me.REG[0]);
+    REGB1 = TAG_Int(1);
+    REGB2 = TAG_Bool(IS_EQUAL_OO(REGB0,REGB1));
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      /* ../lib/standard/kernel.nit:230 */
+      REGB1 = TAG_Bool((REGB0)==(REGB1));
+      /* ../lib/standard/collection/array.nit:618 */
+      REGB2 = REGB1;
+    }
+  } else {
+    REGB1 = TAG_Bool(0);
+    REGB2 = REGB1;
+  }
+  if (UNTAG_Bool(REGB2)) {
+    REGB2 = TAG_Bool(1);
+  } else {
+    REGB1 = CALL_standard___collection___abstract_collection___Collection___is_empty(fra.me.REG[0])(fra.me.REG[0]);
+    REGB2 = REGB1;
+  }
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB2;
+}
+static const char LOCATE_standard___collection___array___ArrayMapKeys___is_empty[] = "array::ArrayMapKeys::(abstract_collection::Collection::is_empty)";
+val_t standard___collection___array___ArrayMapKeys___is_empty(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_standard___collection___array;
+  fra.me.line = 619;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMapKeys___is_empty;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ../lib/standard/collection/array.nit:619 */
+  fra.me.REG[0] = CALL_standard___collection___array___ArrayMapKeys___map(fra.me.REG[0])(fra.me.REG[0]);
+  REGB0 = CALL_standard___collection___abstract_collection___MapRead___is_empty(fra.me.REG[0])(fra.me.REG[0]);
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+static const char LOCATE_standard___collection___array___ArrayMapKeys___length[] = "array::ArrayMapKeys::(abstract_collection::Collection::length)";
+val_t standard___collection___array___ArrayMapKeys___length(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_standard___collection___array;
+  fra.me.line = 620;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMapKeys___length;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ../lib/standard/collection/array.nit:620 */
+  fra.me.REG[0] = CALL_standard___collection___array___ArrayMapKeys___map(fra.me.REG[0])(fra.me.REG[0]);
+  REGB0 = CALL_standard___collection___abstract_collection___MapRead___length(fra.me.REG[0])(fra.me.REG[0]);
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+static const char LOCATE_standard___collection___array___ArrayMapKeys___iterator[] = "array::ArrayMapKeys::(abstract_collection::Collection::iterator)";
+val_t standard___collection___array___ArrayMapKeys___iterator(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_standard___collection___array;
+  fra.me.line = 621;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMapKeys___iterator;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ../lib/standard/collection/array.nit:621 */
+  fra.me.REG[0] = CALL_standard___collection___array___ArrayMapKeys___map(fra.me.REG[0])(fra.me.REG[0]);
+  fra.me.REG[0] = CALL_standard___collection___abstract_collection___MapRead___iterator(fra.me.REG[0])(fra.me.REG[0]);
+  fra.me.REG[0] = NEW_MapKeysIterator_standard___collection___abstract_collection___MapKeysIterator___init(fra.me.REG[0]);
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+static const char LOCATE_standard___collection___array___ArrayMapKeys___clear[] = "array::ArrayMapKeys::(abstract_collection::RemovableCollection::clear)";
+void standard___collection___array___ArrayMapKeys___clear(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_standard___collection___array;
+  fra.me.line = 622;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMapKeys___clear;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ../lib/standard/collection/array.nit:622 */
+  fra.me.REG[0] = CALL_standard___collection___array___ArrayMapKeys___map(fra.me.REG[0])(fra.me.REG[0]);
+  CALL_standard___collection___abstract_collection___Map___clear(fra.me.REG[0])(fra.me.REG[0]);
+  stack_frame_head = fra.me.prev;
+  return;
+}
+static const char LOCATE_standard___collection___array___ArrayMapKeys___remove[] = "array::ArrayMapKeys::(abstract_collection::RemovableCollection::remove)";
+void standard___collection___array___ArrayMapKeys___remove(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t REGB2;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_standard___collection___array;
+  fra.me.line = 623;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMapKeys___remove;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ../lib/standard/collection/array.nit:625 */
+  fra.me.REG[2] = CALL_standard___collection___array___ArrayMapKeys___map(fra.me.REG[0])(fra.me.REG[0]);
+  REGB0 = CALL_standard___collection___array___ArrayMap___index(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[1]);
+  /* ../lib/standard/collection/array.nit:626 */
+  REGB1 = TAG_Int(0);
+  REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+  if (UNTAG_Bool(REGB2)) {
+  } else {
+    nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+  }
+  /* ../lib/standard/kernel.nit:236 */
+  REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
+  /* ../lib/standard/collection/array.nit:626 */
+  if (UNTAG_Bool(REGB1)) {
+    fra.me.REG[0] = CALL_standard___collection___array___ArrayMapKeys___map(fra.me.REG[0])(fra.me.REG[0]);
+    CALL_standard___collection___array___ArrayMap___remove_at_index(fra.me.REG[0])(fra.me.REG[0], REGB0);
+  }
+  stack_frame_head = fra.me.prev;
+  return;
+}
+static const char LOCATE_standard___collection___array___ArrayMapKeys___remove_all[] = "array::ArrayMapKeys::(abstract_collection::RemovableCollection::remove_all)";
+void standard___collection___array___ArrayMapKeys___remove_all(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_standard___collection___array;
+  fra.me.line = 628;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMapKeys___remove_all;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ../lib/standard/collection/array.nit:628 */
+  CALL_standard___collection___abstract_collection___RemovableCollection___remove(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+  stack_frame_head = fra.me.prev;
+  return;
+}
+static const char LOCATE_standard___collection___array___ArrayMapKeys___init[] = "array::ArrayMapKeys::init";
+void standard___collection___array___ArrayMapKeys___init(val_t p0, val_t p1, int* init_table){
+  int itpos12 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_standard___collection___array___ArrayMapKeys].i;
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t tmp;
+  if (init_table[itpos12]) return;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_standard___collection___array;
+  fra.me.line = 0;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMapKeys___init;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  ATTR_standard___collection___array___ArrayMapKeys_____atmap(fra.me.REG[0]) = fra.me.REG[1];
+  stack_frame_head = fra.me.prev;
+  init_table[itpos12] = 1;
+  return;
+}
+static const char LOCATE_standard___collection___array___ArrayMapValues___map[] = "array::ArrayMapValues::map";
+val_t standard___collection___array___ArrayMapValues___map(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_standard___collection___array;
+  fra.me.line = 633;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMapValues___map;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ../lib/standard/collection/array.nit:633 */
+  REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayMapValues_____atmap(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "@map", LOCATE_standard___collection___array, 633);
+  }
+  fra.me.REG[0] = ATTR_standard___collection___array___ArrayMapValues_____atmap(fra.me.REG[0]);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+static const char LOCATE_standard___collection___array___ArrayMapValues___map__eq[] = "array::ArrayMapValues::map=";
+void standard___collection___array___ArrayMapValues___map__eq(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_standard___collection___array;
+  fra.me.line = 633;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMapValues___map__eq;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ../lib/standard/collection/array.nit:633 */
+  ATTR_standard___collection___array___ArrayMapValues_____atmap(fra.me.REG[0]) = fra.me.REG[1];
+  stack_frame_head = fra.me.prev;
+  return;
+}
+static const char LOCATE_standard___collection___array___ArrayMapValues___first[] = "array::ArrayMapValues::(abstract_collection::Collection::first)";
+val_t standard___collection___array___ArrayMapValues___first(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_standard___collection___array;
+  fra.me.line = 635;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMapValues___first;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ../lib/standard/collection/array.nit:635 */
+  fra.me.REG[0] = CALL_standard___collection___array___ArrayMapValues___map(fra.me.REG[0])(fra.me.REG[0]);
+  REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 635);
+  }
+  fra.me.REG[0] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
+  fra.me.REG[0] = CALL_standard___collection___abstract_collection___Collection___first(fra.me.REG[0])(fra.me.REG[0]);
+  REGB0 = TAG_Bool(fra.me.REG[0]==NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+    nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 635);
+  }
+  fra.me.REG[0] = CALL_standard___collection___abstract_collection___Couple___second(fra.me.REG[0])(fra.me.REG[0]);
+  goto label1;
+  label1: while(0);
   stack_frame_head = fra.me.prev;
-  return;
+  return fra.me.REG[0];
 }
-void standard___collection___array___ArrayMap___remove_at(val_t p0, val_t p1){
-  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+static const char LOCATE_standard___collection___array___ArrayMapValues___is_empty[] = "array::ArrayMapValues::(abstract_collection::Collection::is_empty)";
+val_t standard___collection___array___ArrayMapValues___is_empty(val_t p0){
+  struct {struct stack_frame_t me;} fra;
   val_t REGB0;
-  val_t REGB1;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 562;
-  fra.me.meth = LOCATE_standard___collection___array___ArrayMap___remove_at;
+  fra.me.line = 636;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMapValues___is_empty;
   fra.me.has_broke = 0;
-  fra.me.REG_size = 2;
+  fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
-  fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
-  fra.me.REG[1] = p1;
-  /* ./../lib/standard//collection//array.nit:564 */
-  REGB0 = CALL_standard___collection___array___ArrayMap___index(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
-  /* ./../lib/standard//collection//array.nit:565 */
-  REGB1 = TAG_Int(0);
-  /* ./../lib/standard//kernel.nit:216 */
-  REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-  /* ./../lib/standard//collection//array.nit:565 */
-  if (UNTAG_Bool(REGB1)) {
-    CALL_standard___collection___array___ArrayMap___remove_at_index(fra.me.REG[0])(fra.me.REG[0], REGB0);
-  }
+  /* ../lib/standard/collection/array.nit:636 */
+  fra.me.REG[0] = CALL_standard___collection___array___ArrayMapValues___map(fra.me.REG[0])(fra.me.REG[0]);
+  REGB0 = CALL_standard___collection___abstract_collection___MapRead___is_empty(fra.me.REG[0])(fra.me.REG[0]);
+  goto label1;
+  label1: while(0);
   stack_frame_head = fra.me.prev;
-  return;
+  return REGB0;
 }
-void standard___collection___array___ArrayMap___clear(val_t p0){
+static const char LOCATE_standard___collection___array___ArrayMapValues___length[] = "array::ArrayMapValues::(abstract_collection::Collection::length)";
+val_t standard___collection___array___ArrayMapValues___length(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 568;
-  fra.me.meth = LOCATE_standard___collection___array___ArrayMap___clear;
+  fra.me.line = 637;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMapValues___length;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:568 */
-  REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
-  if (UNTAG_Bool(REGB0)) {
-  } else {
-    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 568);
-  }
-  fra.me.REG[0] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
-  CALL_standard___collection___abstract_collection___RemovableCollection___clear(fra.me.REG[0])(fra.me.REG[0]);
+  /* ../lib/standard/collection/array.nit:637 */
+  fra.me.REG[0] = CALL_standard___collection___array___ArrayMapValues___map(fra.me.REG[0])(fra.me.REG[0]);
+  REGB0 = CALL_standard___collection___abstract_collection___MapRead___length(fra.me.REG[0])(fra.me.REG[0]);
+  goto label1;
+  label1: while(0);
   stack_frame_head = fra.me.prev;
-  return;
+  return REGB0;
 }
-void standard___collection___array___ArrayMap___enlarge(val_t p0, val_t p1){
+static const char LOCATE_standard___collection___array___ArrayMapValues___iterator[] = "array::ArrayMapValues::(abstract_collection::Collection::iterator)";
+val_t standard___collection___array___ArrayMapValues___iterator(val_t p0){
   struct {struct stack_frame_t me;} fra;
-  val_t REGB0;
-  val_t REGB1;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 570;
-  fra.me.meth = LOCATE_standard___collection___array___ArrayMap___enlarge;
+  fra.me.line = 638;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMapValues___iterator;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  REGB0 = p1;
-  /* ./../lib/standard//collection//array.nit:571 */
-  REGB1 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
-  if (UNTAG_Bool(REGB1)) {
-  } else {
-    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 571);
-  }
-  fra.me.REG[0] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
-  CALL_standard___collection___array___AbstractArray___enlarge(fra.me.REG[0])(fra.me.REG[0], REGB0);
+  /* ../lib/standard/collection/array.nit:638 */
+  fra.me.REG[0] = CALL_standard___collection___array___ArrayMapValues___map(fra.me.REG[0])(fra.me.REG[0]);
+  fra.me.REG[0] = CALL_standard___collection___abstract_collection___MapRead___iterator(fra.me.REG[0])(fra.me.REG[0]);
+  fra.me.REG[0] = NEW_MapValuesIterator_standard___collection___abstract_collection___MapValuesIterator___init(fra.me.REG[0]);
+  goto label1;
+  label1: while(0);
   stack_frame_head = fra.me.prev;
-  return;
+  return fra.me.REG[0];
 }
-val_t standard___collection___array___ArrayMap___couple_at(val_t p0, val_t p1){
-  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+static const char LOCATE_standard___collection___array___ArrayMapValues___has[] = "array::ArrayMapValues::(abstract_collection::Collection::has)";
+val_t standard___collection___array___ArrayMapValues___has(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[3];} fra;
   val_t REGB0;
   val_t REGB1;
   val_t REGB2;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 573;
-  fra.me.meth = LOCATE_standard___collection___array___ArrayMap___couple_at;
+  fra.me.line = 640;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMapValues___has;
   fra.me.has_broke = 0;
-  fra.me.REG_size = 2;
+  fra.me.REG_size = 4;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[3] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./../lib/standard//collection//array.nit:575 */
-  REGB0 = CALL_standard___collection___array___ArrayMap___index(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
-  /* ./../lib/standard//collection//array.nit:576 */
-  REGB1 = TAG_Int(0);
-  /* ./../lib/standard//kernel.nit:216 */
-  REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-  /* ./../lib/standard//collection//array.nit:576 */
+  /* ../lib/standard/collection/array.nit:643 */
+  fra.me.REG[0] = CALL_standard___collection___array___ArrayMapValues___map(fra.me.REG[0])(fra.me.REG[0]);
+  REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 643);
+  }
+  fra.me.REG[0] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
+  /* ../lib/standard/collection/array.nit:269 */
+  REGB0 = TAG_Int(0);
+  /* ../lib/standard/collection/array.nit:270 */
+  REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB1)) {
-    /* ./../lib/standard//collection//array.nit:577 */
-    REGB1 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
+  } else {
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 270);
+  }
+  REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
+  /* ../lib/standard/collection/array.nit:271 */
+  fra.me.REG[2] = ATTR_standard___collection___array___Array____items(fra.me.REG[0]);
+  /* ../lib/standard/collection/array.nit:272 */
+  while(1) {
+    /* ../lib/standard/collection/array.nit:24 */
+    REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
     if (UNTAG_Bool(REGB1)) {
     } else {
-      nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 577);
+      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
     }
-    fra.me.REG[0] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
-    /* ./../lib/standard//collection//array.nit:245 */
-    REGB1 = TAG_Int(0);
-    /* ./../lib/standard//kernel.nit:216 */
-    REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-    /* ./../lib/standard//collection//array.nit:245 */
+    REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
+    REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+    }
+    /* ../lib/standard/kernel.nit:235 */
+    REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
+    /* ../lib/standard/collection/array.nit:272 */
     if (UNTAG_Bool(REGB1)) {
-      REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
+      /* ../lib/standard/collection/array.nit:273 */
+      REGB1 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
+      if (UNTAG_Bool(REGB1)) {
+        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 273);
+      }
+      /* ../lib/standard/collection/array.nit:724 */
+      fra.me.REG[3] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB0)];
+      /* ../lib/standard/collection/array.nit:643 */
+      fra.me.REG[3] = CALL_standard___collection___abstract_collection___Couple___second(fra.me.REG[3])(fra.me.REG[3]);
+      REGB1 = TAG_Bool(IS_EQUAL_NN(fra.me.REG[3],fra.me.REG[1]));
       if (UNTAG_Bool(REGB1)) {
       } else {
-        nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 245);
+        REGB2 = TAG_Bool(fra.me.REG[3]==NIT_NULL);
+        if (UNTAG_Bool(REGB2)) {
+          REGB2 = TAG_Bool(0);
+          REGB1 = REGB2;
+        } else {
+          REGB2 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[3])(fra.me.REG[3], fra.me.REG[1]);
+          REGB1 = REGB2;
+        }
       }
-      REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-      /* ./../lib/standard//kernel.nit:215 */
-      REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
+      if (UNTAG_Bool(REGB1)) {
+        REGB1 = TAG_Bool(1);
+        goto label1;
+      }
+      /* ../lib/standard/collection/array.nit:274 */
+      REGB2 = TAG_Int(1);
+      /* ../lib/standard/kernel.nit:238 */
+      REGB2 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB2));
+      /* ../lib/standard/collection/array.nit:274 */
+      REGB0 = REGB2;
     } else {
-      /* ./../lib/standard//collection//array.nit:245 */
-      REGB2 = TAG_Bool(false);
-      REGB1 = REGB2;
+      /* ../lib/standard/collection/array.nit:272 */
+      goto label2;
     }
+  }
+  label2: while(0);
+  /* ../lib/standard/collection/array.nit:644 */
+  REGB0 = TAG_Bool(0);
+  REGB1 = REGB0;
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB1;
+}
+static const char LOCATE_standard___collection___array___ArrayMapValues___has_only[] = "array::ArrayMapValues::(abstract_collection::Collection::has_only)";
+val_t standard___collection___array___ArrayMapValues___has_only(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[3];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t REGB2;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_standard___collection___array;
+  fra.me.line = 647;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMapValues___has_only;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 4;
+  fra.me.nitni_local_ref_head = NULL;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[3] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ../lib/standard/collection/array.nit:650 */
+  fra.me.REG[0] = CALL_standard___collection___array___ArrayMapValues___map(fra.me.REG[0])(fra.me.REG[0]);
+  REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 650);
+  }
+  fra.me.REG[0] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
+  /* ../lib/standard/collection/array.nit:269 */
+  REGB0 = TAG_Int(0);
+  /* ../lib/standard/collection/array.nit:270 */
+  REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB1)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 270);
+  }
+  REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
+  /* ../lib/standard/collection/array.nit:271 */
+  fra.me.REG[2] = ATTR_standard___collection___array___Array____items(fra.me.REG[0]);
+  /* ../lib/standard/collection/array.nit:272 */
+  while(1) {
+    /* ../lib/standard/collection/array.nit:24 */
+    REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
     if (UNTAG_Bool(REGB1)) {
     } else {
-      nit_abort("Assert %s  failed", "'index'", LOCATE_standard___collection___array, 245);
+      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
     }
-    /* ./../lib/standard//collection//array.nit:246 */
-    fra.me.REG[0] = ATTR_standard___collection___array___Array____items(fra.me.REG[0]);
-    REGB1 = TAG_Bool(fra.me.REG[0]==NIT_NULL);
+    REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
+    REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+    }
+    /* ../lib/standard/kernel.nit:235 */
+    REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
+    /* ../lib/standard/collection/array.nit:272 */
     if (UNTAG_Bool(REGB1)) {
-      nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 246);
+      /* ../lib/standard/collection/array.nit:273 */
+      REGB1 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
+      if (UNTAG_Bool(REGB1)) {
+        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 273);
+      }
+      /* ../lib/standard/collection/array.nit:724 */
+      fra.me.REG[3] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB0)];
+      /* ../lib/standard/collection/array.nit:650 */
+      fra.me.REG[3] = CALL_standard___collection___abstract_collection___Couple___second(fra.me.REG[3])(fra.me.REG[3]);
+      REGB1 = TAG_Bool(IS_EQUAL_NN(fra.me.REG[3],fra.me.REG[1]));
+      if (UNTAG_Bool(REGB1)) {
+      } else {
+        REGB2 = TAG_Bool(fra.me.REG[3]==NIT_NULL);
+        if (UNTAG_Bool(REGB2)) {
+          REGB2 = TAG_Bool(0);
+          REGB1 = REGB2;
+        } else {
+          REGB2 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[3])(fra.me.REG[3], fra.me.REG[1]);
+          REGB1 = REGB2;
+        }
+      }
+      REGB1 = TAG_Bool(!UNTAG_Bool(REGB1));
+      if (UNTAG_Bool(REGB1)) {
+        REGB1 = TAG_Bool(0);
+        goto label1;
+      }
+      /* ../lib/standard/collection/array.nit:274 */
+      REGB2 = TAG_Int(1);
+      /* ../lib/standard/kernel.nit:238 */
+      REGB2 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB2));
+      /* ../lib/standard/collection/array.nit:274 */
+      REGB0 = REGB2;
+    } else {
+      /* ../lib/standard/collection/array.nit:272 */
+      goto label2;
     }
-    /* ./../lib/standard//collection//array.nit:654 */
-    fra.me.REG[0] = ((Nit_NativeArray)fra.me.REG[0])->val[UNTAG_Int(REGB0)];
-    /* ./../lib/standard//collection//array.nit:246 */
-    goto label1;
-    label1: while(0);
-    /* ./../lib/standard//collection//array.nit:577 */
-    goto label2;
-  } else {
-    /* ./../lib/standard//collection//array.nit:579 */
-    fra.me.REG[0] = NIT_NULL;
-    goto label2;
   }
   label2: while(0);
+  /* ../lib/standard/collection/array.nit:651 */
+  REGB0 = TAG_Bool(1);
+  REGB1 = REGB0;
+  goto label1;
+  label1: while(0);
   stack_frame_head = fra.me.prev;
-  return fra.me.REG[0];
+  return REGB1;
 }
-void standard___collection___array___ArrayMap___remove_at_index(val_t p0, val_t p1){
-  struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
+static const char LOCATE_standard___collection___array___ArrayMapValues___count[] = "array::ArrayMapValues::(abstract_collection::Collection::count)";
+val_t standard___collection___array___ArrayMapValues___count(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[3];} fra;
   val_t REGB0;
   val_t REGB1;
+  val_t REGB2;
+  val_t REGB3;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 586;
-  fra.me.meth = LOCATE_standard___collection___array___ArrayMap___remove_at_index;
+  fra.me.line = 654;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMapValues___count;
   fra.me.has_broke = 0;
-  fra.me.REG_size = 3;
+  fra.me.REG_size = 4;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[3] = NIT_NULL;
   fra.me.REG[0] = p0;
-  REGB0 = p1;
-  /* ./../lib/standard//collection//array.nit:589 */
+  fra.me.REG[1] = p1;
+  /* ../lib/standard/collection/array.nit:657 */
+  REGB0 = TAG_Int(0);
+  /* ../lib/standard/collection/array.nit:658 */
+  fra.me.REG[0] = CALL_standard___collection___array___ArrayMapValues___map(fra.me.REG[0])(fra.me.REG[0]);
   REGB1 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 589);
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 658);
   }
-  fra.me.REG[1] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
-  REGB1 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
-  if (UNTAG_Bool(REGB1)) {
+  fra.me.REG[0] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
+  /* ../lib/standard/collection/array.nit:269 */
+  REGB1 = TAG_Int(0);
+  /* ../lib/standard/collection/array.nit:270 */
+  REGB2 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB2)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 589);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 270);
   }
-  fra.me.REG[2] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
-  fra.me.REG[2] = CALL_standard___collection___abstract_collection___SequenceRead___last(fra.me.REG[2])(fra.me.REG[2]);
-  CALL_standard___collection___abstract_collection___Map_____braeq(fra.me.REG[1])(fra.me.REG[1], REGB0, fra.me.REG[2]);
-  /* ./../lib/standard//collection//array.nit:590 */
-  REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
-  if (UNTAG_Bool(REGB0)) {
-  } else {
-    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 590);
+  REGB2 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
+  /* ../lib/standard/collection/array.nit:271 */
+  fra.me.REG[2] = ATTR_standard___collection___array___Array____items(fra.me.REG[0]);
+  /* ../lib/standard/collection/array.nit:272 */
+  while(1) {
+    /* ../lib/standard/collection/array.nit:24 */
+    REGB2 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
+    if (UNTAG_Bool(REGB2)) {
+    } else {
+      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
+    }
+    REGB2 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
+    REGB3 = TAG_Bool(VAL_ISA(REGB2, VTCOLOR_standard___kernel___Comparable___OTHER(REGB1), VTID_standard___kernel___Comparable___OTHER(REGB1))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB3)) {
+    } else {
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+    }
+    /* ../lib/standard/kernel.nit:235 */
+    REGB2 = TAG_Bool(UNTAG_Int(REGB1)<UNTAG_Int(REGB2));
+    /* ../lib/standard/collection/array.nit:272 */
+    if (UNTAG_Bool(REGB2)) {
+      /* ../lib/standard/collection/array.nit:273 */
+      REGB2 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
+      if (UNTAG_Bool(REGB2)) {
+        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 273);
+      }
+      /* ../lib/standard/collection/array.nit:724 */
+      fra.me.REG[3] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB1)];
+      /* ../lib/standard/collection/array.nit:658 */
+      fra.me.REG[3] = CALL_standard___collection___abstract_collection___Couple___second(fra.me.REG[3])(fra.me.REG[3]);
+      REGB2 = TAG_Bool(IS_EQUAL_NN(fra.me.REG[3],fra.me.REG[1]));
+      if (UNTAG_Bool(REGB2)) {
+      } else {
+        REGB3 = TAG_Bool(fra.me.REG[3]==NIT_NULL);
+        if (UNTAG_Bool(REGB3)) {
+          REGB3 = TAG_Bool(0);
+          REGB2 = REGB3;
+        } else {
+          REGB3 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[3])(fra.me.REG[3], fra.me.REG[1]);
+          REGB2 = REGB3;
+        }
+      }
+      if (UNTAG_Bool(REGB2)) {
+        REGB2 = TAG_Int(1);
+        /* ../lib/standard/kernel.nit:238 */
+        REGB2 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB2));
+        /* ../lib/standard/collection/array.nit:658 */
+        REGB0 = REGB2;
+      }
+      /* ../lib/standard/collection/array.nit:274 */
+      REGB2 = TAG_Int(1);
+      /* ../lib/standard/kernel.nit:238 */
+      REGB2 = TAG_Int(UNTAG_Int(REGB1)+UNTAG_Int(REGB2));
+      /* ../lib/standard/collection/array.nit:274 */
+      REGB1 = REGB2;
+    } else {
+      /* ../lib/standard/collection/array.nit:272 */
+      goto label1;
+    }
   }
-  fra.me.REG[0] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
-  CALL_standard___collection___abstract_collection___Sequence___pop(fra.me.REG[0])(fra.me.REG[0]);
+  label1: while(0);
+  /* ../lib/standard/collection/array.nit:659 */
+  goto label2;
+  label2: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+static const char LOCATE_standard___collection___array___ArrayMapValues___clear[] = "array::ArrayMapValues::(abstract_collection::RemovableCollection::clear)";
+void standard___collection___array___ArrayMapValues___clear(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_standard___collection___array;
+  fra.me.line = 662;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMapValues___clear;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  /* ../lib/standard/collection/array.nit:662 */
+  fra.me.REG[0] = CALL_standard___collection___array___ArrayMapValues___map(fra.me.REG[0])(fra.me.REG[0]);
+  CALL_standard___collection___abstract_collection___Map___clear(fra.me.REG[0])(fra.me.REG[0]);
   stack_frame_head = fra.me.prev;
   return;
 }
-val_t standard___collection___array___ArrayMap___index(val_t p0, val_t p1){
+static const char LOCATE_standard___collection___array___ArrayMapValues___remove[] = "array::ArrayMapValues::(abstract_collection::RemovableCollection::remove)";
+void standard___collection___array___ArrayMapValues___remove(val_t p0, val_t p1){
   struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t REGB0;
   val_t REGB1;
   val_t REGB2;
   val_t REGB3;
-  val_t REGB4;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 596;
-  fra.me.meth = LOCATE_standard___collection___array___ArrayMap___index;
+  fra.me.line = 664;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMapValues___remove;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ./../lib/standard//collection//array.nit:600 */
-  REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____last_index(fra.me.REG[0])!=NIT_NULL);
+  /* ../lib/standard/collection/array.nit:666 */
+  fra.me.REG[0] = CALL_standard___collection___array___ArrayMapValues___map(fra.me.REG[0])(fra.me.REG[0]);
+  /* ../lib/standard/collection/array.nit:667 */
+  REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
   if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_last_index", LOCATE_standard___collection___array, 600);
-  }
-  REGB0 = ATTR_standard___collection___array___ArrayMap____last_index(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:601 */
-  REGB1 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
-  if (UNTAG_Bool(REGB1)) {
-  } else {
-    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 601);
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 667);
   }
   fra.me.REG[2] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
-  /* ./../lib/standard//collection//array.nit:23 */
-  REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
-  if (UNTAG_Bool(REGB1)) {
+  /* ../lib/standard/collection/array.nit:24 */
+  REGB0 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
   } else {
-    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
   }
-  REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
-  /* ./../lib/standard//kernel.nit:215 */
-  REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
-  /* ./../lib/standard//collection//array.nit:601 */
-  if (UNTAG_Bool(REGB1)) {
-    REGB1 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
-    if (UNTAG_Bool(REGB1)) {
+  REGB0 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
+  /* ../lib/standard/collection/array.nit:667 */
+  REGB1 = TAG_Int(1);
+  /* ../lib/standard/kernel.nit:240 */
+  REGB1 = TAG_Int(UNTAG_Int(REGB0)-UNTAG_Int(REGB1));
+  /* ../lib/standard/collection/array.nit:668 */
+  while(1) {
+    REGB0 = TAG_Int(0);
+    REGB2 = TAG_Bool(VAL_ISA(REGB0, VTCOLOR_standard___kernel___Comparable___OTHER(REGB1), VTID_standard___kernel___Comparable___OTHER(REGB1))) /*cast OTHER*/;
+    if (UNTAG_Bool(REGB2)) {
     } else {
-      nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 601);
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
     }
-    fra.me.REG[2] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
-    /* ./../lib/standard//collection//array.nit:243 */
-    REGB1 = REGB0;
-    /* ./../lib/standard//collection//array.nit:245 */
-    REGB2 = TAG_Int(0);
-    /* ./../lib/standard//kernel.nit:216 */
-    REGB2 = TAG_Bool(UNTAG_Int(REGB1)>=UNTAG_Int(REGB2));
-    /* ./../lib/standard//collection//array.nit:245 */
-    if (UNTAG_Bool(REGB2)) {
-      REGB2 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
+    /* ../lib/standard/kernel.nit:236 */
+    REGB0 = TAG_Bool(UNTAG_Int(REGB1)>=UNTAG_Int(REGB0));
+    /* ../lib/standard/collection/array.nit:668 */
+    if (UNTAG_Bool(REGB0)) {
+      /* ../lib/standard/collection/array.nit:669 */
+      REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
+      if (UNTAG_Bool(REGB0)) {
+      } else {
+        nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 669);
+      }
+      fra.me.REG[2] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
+      /* ../lib/standard/collection/array.nit:278 */
+      REGB0 = REGB1;
+      /* ../lib/standard/collection/array.nit:280 */
+      REGB2 = TAG_Int(0);
+      REGB3 = TAG_Bool(VAL_ISA(REGB2, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+      if (UNTAG_Bool(REGB3)) {
+      } else {
+        nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+      }
+      /* ../lib/standard/kernel.nit:236 */
+      REGB2 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB2));
+      /* ../lib/standard/collection/array.nit:280 */
+      if (UNTAG_Bool(REGB2)) {
+        REGB2 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
+        if (UNTAG_Bool(REGB2)) {
+        } else {
+          nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 280);
+        }
+        REGB2 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
+        REGB3 = TAG_Bool(VAL_ISA(REGB2, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
+        if (UNTAG_Bool(REGB3)) {
+        } else {
+          nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+        }
+        /* ../lib/standard/kernel.nit:235 */
+        REGB2 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB2));
+      } else {
+        /* ../lib/standard/collection/array.nit:280 */
+        REGB3 = TAG_Bool(0);
+        REGB2 = REGB3;
+      }
       if (UNTAG_Bool(REGB2)) {
       } else {
-        nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 245);
+        nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
       }
-      REGB2 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
-      /* ./../lib/standard//kernel.nit:215 */
-      REGB2 = TAG_Bool(UNTAG_Int(REGB1)<UNTAG_Int(REGB2));
-    } else {
-      /* ./../lib/standard//collection//array.nit:245 */
-      REGB3 = TAG_Bool(false);
-      REGB2 = REGB3;
-    }
-    if (UNTAG_Bool(REGB2)) {
-    } else {
-      nit_abort("Assert %s  failed", "'index'", LOCATE_standard___collection___array, 245);
-    }
-    /* ./../lib/standard//collection//array.nit:246 */
-    fra.me.REG[2] = ATTR_standard___collection___array___Array____items(fra.me.REG[2]);
-    REGB2 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
-    if (UNTAG_Bool(REGB2)) {
-      nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 246);
-    }
-    /* ./../lib/standard//collection//array.nit:654 */
-    fra.me.REG[2] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB1)];
-    /* ./../lib/standard//collection//array.nit:246 */
-    goto label1;
-    label1: while(0);
-    /* ./../lib/standard//collection//array.nit:601 */
-    REGB1 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
-    if (UNTAG_Bool(REGB1)) {
-      nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 601);
-    }
-    fra.me.REG[2] = CALL_standard___collection___abstract_collection___Couple___first(fra.me.REG[2])(fra.me.REG[2]);
-    REGB1 = TAG_Bool(IS_EQUAL_ON(fra.me.REG[1],fra.me.REG[2]));
-    if (UNTAG_Bool(REGB1)) {
-    } else {
+      /* ../lib/standard/collection/array.nit:281 */
+      fra.me.REG[2] = ATTR_standard___collection___array___Array____items(fra.me.REG[2]);
       REGB2 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
       if (UNTAG_Bool(REGB2)) {
-        REGB2 = TAG_Bool(false);
-        REGB1 = REGB2;
+        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 281);
+      }
+      /* ../lib/standard/collection/array.nit:724 */
+      fra.me.REG[2] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB0)];
+      /* ../lib/standard/collection/array.nit:281 */
+      goto label1;
+      label1: while(0);
+      /* ../lib/standard/collection/array.nit:669 */
+      REGB0 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
+      if (UNTAG_Bool(REGB0)) {
+        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 669);
+      }
+      fra.me.REG[2] = CALL_standard___collection___abstract_collection___Couple___second(fra.me.REG[2])(fra.me.REG[2]);
+      REGB0 = TAG_Bool(IS_EQUAL_NN(fra.me.REG[2],fra.me.REG[1]));
+      if (UNTAG_Bool(REGB0)) {
       } else {
-        REGB2 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[1]);
-        REGB1 = REGB2;
+        REGB2 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
+        if (UNTAG_Bool(REGB2)) {
+          REGB2 = TAG_Bool(0);
+          REGB0 = REGB2;
+        } else {
+          REGB2 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[1]);
+          REGB0 = REGB2;
+        }
+      }
+      if (UNTAG_Bool(REGB0)) {
+        /* ../lib/standard/collection/array.nit:670 */
+        CALL_standard___collection___array___ArrayMap___remove_at_index(fra.me.REG[0])(fra.me.REG[0], REGB1);
+        /* ../lib/standard/collection/array.nit:671 */
+        goto label2;
       }
+      /* ../lib/standard/collection/array.nit:673 */
+      REGB0 = TAG_Int(1);
+      /* ../lib/standard/kernel.nit:240 */
+      REGB0 = TAG_Int(UNTAG_Int(REGB1)-UNTAG_Int(REGB0));
+      /* ../lib/standard/collection/array.nit:673 */
+      REGB1 = REGB0;
+    } else {
+      /* ../lib/standard/collection/array.nit:668 */
+      goto label3;
     }
+  }
+  label3: while(0);
+  label2: while(0);
+  stack_frame_head = fra.me.prev;
+  return;
+}
+static const char LOCATE_standard___collection___array___ArrayMapValues___remove_all[] = "array::ArrayMapValues::(abstract_collection::RemovableCollection::remove_all)";
+void standard___collection___array___ArrayMapValues___remove_all(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t REGB2;
+  val_t REGB3;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_standard___collection___array;
+  fra.me.line = 677;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMapValues___remove_all;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ../lib/standard/collection/array.nit:679 */
+  fra.me.REG[0] = CALL_standard___collection___array___ArrayMapValues___map(fra.me.REG[0])(fra.me.REG[0]);
+  /* ../lib/standard/collection/array.nit:680 */
+  REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
   } else {
-    REGB2 = TAG_Bool(false);
-    REGB1 = REGB2;
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 680);
   }
-  if (UNTAG_Bool(REGB1)) {
-    goto label2;
+  fra.me.REG[2] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
+  /* ../lib/standard/collection/array.nit:24 */
+  REGB0 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 24);
   }
-  /* ./../lib/standard//collection//array.nit:603 */
-  REGB1 = TAG_Int(0);
-  /* ./../lib/standard//collection//array.nit:604 */
+  REGB0 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
+  /* ../lib/standard/collection/array.nit:680 */
+  REGB1 = TAG_Int(1);
+  /* ../lib/standard/kernel.nit:240 */
+  REGB1 = TAG_Int(UNTAG_Int(REGB0)-UNTAG_Int(REGB1));
+  /* ../lib/standard/collection/array.nit:681 */
   while(1) {
-    REGB2 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
-    if (UNTAG_Bool(REGB2)) {
-    } else {
-      nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 604);
-    }
-    fra.me.REG[2] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
-    /* ./../lib/standard//collection//array.nit:23 */
-    REGB2 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
+    REGB0 = TAG_Int(0);
+    REGB2 = TAG_Bool(VAL_ISA(REGB0, VTCOLOR_standard___kernel___Comparable___OTHER(REGB1), VTID_standard___kernel___Comparable___OTHER(REGB1))) /*cast OTHER*/;
     if (UNTAG_Bool(REGB2)) {
     } else {
-      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 23);
+      nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
     }
-    REGB2 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
-    /* ./../lib/standard//kernel.nit:215 */
-    REGB2 = TAG_Bool(UNTAG_Int(REGB1)<UNTAG_Int(REGB2));
-    /* ./../lib/standard//collection//array.nit:604 */
-    if (UNTAG_Bool(REGB2)) {
-      /* ./../lib/standard//collection//array.nit:605 */
-      REGB2 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
-      if (UNTAG_Bool(REGB2)) {
+    /* ../lib/standard/kernel.nit:236 */
+    REGB0 = TAG_Bool(UNTAG_Int(REGB1)>=UNTAG_Int(REGB0));
+    /* ../lib/standard/collection/array.nit:681 */
+    if (UNTAG_Bool(REGB0)) {
+      /* ../lib/standard/collection/array.nit:682 */
+      REGB0 = TAG_Bool(ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0])!=NIT_NULL);
+      if (UNTAG_Bool(REGB0)) {
       } else {
-        nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 605);
+        nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 682);
       }
       fra.me.REG[2] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
-      /* ./../lib/standard//collection//array.nit:243 */
-      REGB2 = REGB1;
-      /* ./../lib/standard//collection//array.nit:245 */
-      REGB3 = TAG_Int(0);
-      /* ./../lib/standard//kernel.nit:216 */
-      REGB3 = TAG_Bool(UNTAG_Int(REGB2)>=UNTAG_Int(REGB3));
-      /* ./../lib/standard//collection//array.nit:245 */
+      /* ../lib/standard/collection/array.nit:278 */
+      REGB0 = REGB1;
+      /* ../lib/standard/collection/array.nit:280 */
+      REGB2 = TAG_Int(0);
+      REGB3 = TAG_Bool(VAL_ISA(REGB2, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
       if (UNTAG_Bool(REGB3)) {
-        REGB3 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
+      } else {
+        nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
+      }
+      /* ../lib/standard/kernel.nit:236 */
+      REGB2 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB2));
+      /* ../lib/standard/collection/array.nit:280 */
+      if (UNTAG_Bool(REGB2)) {
+        REGB2 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
+        if (UNTAG_Bool(REGB2)) {
+        } else {
+          nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 280);
+        }
+        REGB2 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
+        REGB3 = TAG_Bool(VAL_ISA(REGB2, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
         if (UNTAG_Bool(REGB3)) {
         } else {
-          nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 245);
+          nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
         }
-        REGB3 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
-        /* ./../lib/standard//kernel.nit:215 */
-        REGB3 = TAG_Bool(UNTAG_Int(REGB2)<UNTAG_Int(REGB3));
+        /* ../lib/standard/kernel.nit:235 */
+        REGB2 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB2));
       } else {
-        /* ./../lib/standard//collection//array.nit:245 */
-        REGB4 = TAG_Bool(false);
-        REGB3 = REGB4;
+        /* ../lib/standard/collection/array.nit:280 */
+        REGB3 = TAG_Bool(0);
+        REGB2 = REGB3;
       }
-      if (UNTAG_Bool(REGB3)) {
+      if (UNTAG_Bool(REGB2)) {
       } else {
-        nit_abort("Assert %s  failed", "'index'", LOCATE_standard___collection___array, 245);
+        nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
       }
-      /* ./../lib/standard//collection//array.nit:246 */
+      /* ../lib/standard/collection/array.nit:281 */
       fra.me.REG[2] = ATTR_standard___collection___array___Array____items(fra.me.REG[2]);
-      REGB3 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
-      if (UNTAG_Bool(REGB3)) {
-        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 246);
-      }
-      /* ./../lib/standard//collection//array.nit:654 */
-      fra.me.REG[2] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB2)];
-      /* ./../lib/standard//collection//array.nit:246 */
-      goto label3;
-      label3: while(0);
-      /* ./../lib/standard//collection//array.nit:605 */
       REGB2 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
       if (UNTAG_Bool(REGB2)) {
-        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 605);
+        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 281);
       }
-      fra.me.REG[2] = CALL_standard___collection___abstract_collection___Couple___first(fra.me.REG[2])(fra.me.REG[2]);
-      REGB2 = TAG_Bool(IS_EQUAL_ON(fra.me.REG[1],fra.me.REG[2]));
-      if (UNTAG_Bool(REGB2)) {
+      /* ../lib/standard/collection/array.nit:724 */
+      fra.me.REG[2] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB0)];
+      /* ../lib/standard/collection/array.nit:281 */
+      goto label1;
+      label1: while(0);
+      /* ../lib/standard/collection/array.nit:682 */
+      REGB0 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
+      if (UNTAG_Bool(REGB0)) {
+        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 682);
+      }
+      fra.me.REG[2] = CALL_standard___collection___abstract_collection___Couple___second(fra.me.REG[2])(fra.me.REG[2]);
+      REGB0 = TAG_Bool(IS_EQUAL_NN(fra.me.REG[2],fra.me.REG[1]));
+      if (UNTAG_Bool(REGB0)) {
       } else {
-        REGB3 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
-        if (UNTAG_Bool(REGB3)) {
-          REGB3 = TAG_Bool(false);
-          REGB2 = REGB3;
+        REGB2 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
+        if (UNTAG_Bool(REGB2)) {
+          REGB2 = TAG_Bool(0);
+          REGB0 = REGB2;
         } else {
-          REGB3 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[1]);
-          REGB2 = REGB3;
+          REGB2 = CALL_standard___kernel___Object_____eqeq(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[1]);
+          REGB0 = REGB2;
         }
       }
-      if (UNTAG_Bool(REGB2)) {
-        /* ./../lib/standard//collection//array.nit:606 */
-        ATTR_standard___collection___array___ArrayMap____last_index(fra.me.REG[0]) = REGB1;
-        /* ./../lib/standard//collection//array.nit:607 */
-        REGB0 = REGB1;
-        goto label2;
+      if (UNTAG_Bool(REGB0)) {
+        /* ../lib/standard/collection/array.nit:683 */
+        CALL_standard___collection___array___ArrayMap___remove_at_index(fra.me.REG[0])(fra.me.REG[0], REGB1);
       }
-      /* ./../lib/standard//collection//array.nit:609 */
-      REGB2 = TAG_Int(1);
-      /* ./../lib/standard//kernel.nit:218 */
-      REGB2 = TAG_Int(UNTAG_Int(REGB1)+UNTAG_Int(REGB2));
-      /* ./../lib/standard//collection//array.nit:609 */
-      REGB1 = REGB2;
+      /* ../lib/standard/collection/array.nit:685 */
+      REGB0 = TAG_Int(1);
+      /* ../lib/standard/kernel.nit:240 */
+      REGB0 = TAG_Int(UNTAG_Int(REGB1)-UNTAG_Int(REGB0));
+      /* ../lib/standard/collection/array.nit:685 */
+      REGB1 = REGB0;
     } else {
-      /* ./../lib/standard//collection//array.nit:604 */
-      goto label4;
+      /* ../lib/standard/collection/array.nit:681 */
+      goto label2;
     }
   }
-  label4: while(0);
-  /* ./../lib/standard//collection//array.nit:611 */
-  REGB1 = TAG_Int(1);
-  /* ./../lib/standard//kernel.nit:219 */
-  REGB1 = TAG_Int(-UNTAG_Int(REGB1));
-  /* ./../lib/standard//collection//array.nit:611 */
-  REGB0 = REGB1;
-  goto label2;
   label2: while(0);
   stack_frame_head = fra.me.prev;
-  return REGB0;
+  return;
 }
-void standard___collection___array___ArrayMap___init(val_t p0, int* init_table){
-  int itpos10 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_standard___collection___array___ArrayMap].i;
+static const char LOCATE_standard___collection___array___ArrayMapValues___init[] = "array::ArrayMapValues::init";
+void standard___collection___array___ArrayMapValues___init(val_t p0, val_t p1, int* init_table){
+  int itpos13 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_standard___collection___array___ArrayMapValues].i;
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t tmp;
-  if (init_table[itpos10]) return;
+  if (init_table[itpos13]) return;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 614;
-  fra.me.meth = LOCATE_standard___collection___array___ArrayMap___init;
+  fra.me.line = 0;
+  fra.me.meth = LOCATE_standard___collection___array___ArrayMapValues___init;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:617 */
-  fra.me.REG[1] = NEW_Array_standard___collection___array___Array___init();
-  ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]) = fra.me.REG[1];
+  fra.me.REG[1] = p1;
+  ATTR_standard___collection___array___ArrayMapValues_____atmap(fra.me.REG[0]) = fra.me.REG[1];
   stack_frame_head = fra.me.prev;
-  init_table[itpos10] = 1;
+  init_table[itpos13] = 1;
   return;
 }
+static const char LOCATE_standard___collection___array___Iterator___to_a[] = "array::Iterator::to_a";
 val_t standard___collection___array___Iterator___to_a(val_t p0){
   struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t REGB0;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 624;
+  fra.me.line = 694;
   fra.me.meth = LOCATE_standard___collection___array___Iterator___to_a;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:627 */
+  /* ../lib/standard/collection/array.nit:697 */
   fra.me.REG[1] = NEW_Array_standard___collection___array___Array___init();
-  /* ./../lib/standard//collection//array.nit:628 */
+  /* ../lib/standard/collection/array.nit:698 */
   while(1) {
     REGB0 = CALL_standard___collection___abstract_collection___Iterator___is_ok(fra.me.REG[0])(fra.me.REG[0]);
     if (UNTAG_Bool(REGB0)) {
-      /* ./../lib/standard//collection//array.nit:629 */
+      /* ../lib/standard/collection/array.nit:699 */
       fra.me.REG[2] = CALL_standard___collection___abstract_collection___Iterator___item(fra.me.REG[0])(fra.me.REG[0]);
       CALL_standard___collection___abstract_collection___SimpleCollection___add(fra.me.REG[1])(fra.me.REG[1], fra.me.REG[2]);
-      /* ./../lib/standard//collection//array.nit:630 */
+      /* ../lib/standard/collection/array.nit:700 */
       CALL_standard___collection___abstract_collection___Iterator___next(fra.me.REG[0])(fra.me.REG[0]);
     } else {
-      /* ./../lib/standard//collection//array.nit:628 */
+      /* ../lib/standard/collection/array.nit:698 */
       goto label1;
     }
   }
   label1: while(0);
-  /* ./../lib/standard//collection//array.nit:632 */
+  /* ../lib/standard/collection/array.nit:702 */
   goto label2;
   label2: while(0);
   stack_frame_head = fra.me.prev;
   return fra.me.REG[1];
 }
+static const char LOCATE_standard___collection___array___Collection___to_a[] = "array::Collection::to_a";
 val_t standard___collection___array___Collection___to_a(val_t p0){
   struct {struct stack_frame_t me;} fra;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 637;
+  fra.me.line = 707;
   fra.me.meth = LOCATE_standard___collection___array___Collection___to_a;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ./../lib/standard//collection//array.nit:640 */
+  /* ../lib/standard/collection/array.nit:710 */
   fra.me.REG[0] = CALL_standard___collection___abstract_collection___Collection___iterator(fra.me.REG[0])(fra.me.REG[0]);
   fra.me.REG[0] = CALL_standard___collection___array___Iterator___to_a(fra.me.REG[0])(fra.me.REG[0]);
   goto label1;
@@ -4525,78 +5705,86 @@ val_t standard___collection___array___Collection___to_a(val_t p0){
   stack_frame_head = fra.me.prev;
   return fra.me.REG[0];
 }
+static const char LOCATE_standard___collection___array___ArrayCapable___calloc_array[] = "array::ArrayCapable::calloc_array";
 val_t standard___collection___array___ArrayCapable___calloc_array(val_t p0, val_t p1){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 648;
+  fra.me.line = 718;
   fra.me.meth = LOCATE_standard___collection___array___ArrayCapable___calloc_array;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
   REGB0 = p1;
-  /* ./../lib/standard//collection//array.nit:648 */
+  /* ../lib/standard/collection/array.nit:718 */
   fra.me.REG[0] = NEW_NativeArray(UNTAG_Int(REGB0), sizeof(val_t));
   stack_frame_head = fra.me.prev;
   return fra.me.REG[0];
 }
+static const char LOCATE_standard___collection___array___NativeArray_____bra[] = "array::NativeArray::[]";
 val_t standard___collection___array___NativeArray_____bra(val_t p0, val_t p1){
   struct {struct stack_frame_t me;} fra;
   val_t REGB0;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 654;
+  fra.me.line = 724;
   fra.me.meth = LOCATE_standard___collection___array___NativeArray_____bra;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
   REGB0 = p1;
-  /* ./../lib/standard//collection//array.nit:654 */
+  /* ../lib/standard/collection/array.nit:724 */
   fra.me.REG[0] = ((Nit_NativeArray)fra.me.REG[0])->val[UNTAG_Int(REGB0)];
   stack_frame_head = fra.me.prev;
   return fra.me.REG[0];
 }
+static const char LOCATE_standard___collection___array___NativeArray_____braeq[] = "array::NativeArray::[]=";
 void standard___collection___array___NativeArray_____braeq(val_t p0, val_t p1, val_t p2){
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 655;
+  fra.me.line = 725;
   fra.me.meth = LOCATE_standard___collection___array___NativeArray_____braeq;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   REGB0 = p1;
   fra.me.REG[1] = p2;
-  /* ./../lib/standard//collection//array.nit:655 */
+  /* ../lib/standard/collection/array.nit:725 */
   ((Nit_NativeArray)fra.me.REG[0])->val[UNTAG_Int(REGB0)]=fra.me.REG[1];
   stack_frame_head = fra.me.prev;
   return;
 }
+static const char LOCATE_standard___collection___array___NativeArray___copy_to[] = "array::NativeArray::copy_to";
 void standard___collection___array___NativeArray___copy_to(val_t p0, val_t p1, val_t p2){
   struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
   val_t REGB0;
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 656;
+  fra.me.line = 726;
   fra.me.meth = LOCATE_standard___collection___array___NativeArray___copy_to;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
+  fra.me.nitni_local_ref_head = NULL;
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
   REGB0 = p2;
-  /* ./../lib/standard//collection//array.nit:656 */
+  /* ../lib/standard/collection/array.nit:726 */
   (void)memcpy(((Nit_NativeArray )fra.me.REG[1])->val, ((Nit_NativeArray)fra.me.REG[0])->val, UNTAG_Int(REGB0)*sizeof(val_t));
   stack_frame_head = fra.me.prev;
   return;