c_src : Regenerated c_src to prevent use of String contructors

[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 f7d2626..9ede4b2 100644 (file)
--- a/c_src/standard___collection___array._sep.c
+++ b/c_src/standard___collection___array._sep.c
@@ -51,7 +51,7 @@ 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:230 */
+    /* ../lib/standard/kernel.nit:237 */
     REGB1 = TAG_Bool((REGB0)==(REGB1));
     /* ../lib/standard/collection/array.nit:26 */
     REGB2 = REGB1;
@@ -97,7 +97,7 @@ val_t standard___collection___array___AbstractArrayRead___has(val_t p0, val_t p1
     } else {
       nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
     }
-    /* ../lib/standard/kernel.nit:235 */
+    /* ../lib/standard/kernel.nit:242 */
     REGB2 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
     /* ../lib/standard/collection/array.nit:32 */
     if (UNTAG_Bool(REGB2)) {
@@ -121,7 +121,7 @@ val_t standard___collection___array___AbstractArrayRead___has(val_t p0, val_t p1
       }
       /* ../lib/standard/collection/array.nit:34 */
       REGB3 = TAG_Int(1);
-      /* ../lib/standard/kernel.nit:238 */
+      /* ../lib/standard/kernel.nit:245 */
       REGB3 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB3));
       /* ../lib/standard/collection/array.nit:34 */
       REGB0 = REGB3;
@@ -175,7 +175,7 @@ val_t standard___collection___array___AbstractArrayRead___has_only(val_t p0, val
     } else {
       nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
     }
-    /* ../lib/standard/kernel.nit:235 */
+    /* ../lib/standard/kernel.nit:242 */
     REGB2 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
     /* ../lib/standard/collection/array.nit:43 */
     if (UNTAG_Bool(REGB2)) {
@@ -200,7 +200,7 @@ val_t standard___collection___array___AbstractArrayRead___has_only(val_t p0, val
       }
       /* ../lib/standard/collection/array.nit:45 */
       REGB3 = TAG_Int(1);
-      /* ../lib/standard/kernel.nit:238 */
+      /* ../lib/standard/kernel.nit:245 */
       REGB3 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB3));
       /* ../lib/standard/collection/array.nit:45 */
       REGB0 = REGB3;
@@ -257,7 +257,7 @@ val_t standard___collection___array___AbstractArrayRead___count(val_t p0, val_t
     } else {
       nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
     }
-    /* ../lib/standard/kernel.nit:235 */
+    /* ../lib/standard/kernel.nit:242 */
     REGB3 = TAG_Bool(UNTAG_Int(REGB1)<UNTAG_Int(REGB2));
     /* ../lib/standard/collection/array.nit:55 */
     if (UNTAG_Bool(REGB3)) {
@@ -277,14 +277,14 @@ val_t standard___collection___array___AbstractArrayRead___count(val_t p0, val_t
       }
       if (UNTAG_Bool(REGB3)) {
         REGB3 = TAG_Int(1);
-        /* ../lib/standard/kernel.nit:238 */
+        /* ../lib/standard/kernel.nit:245 */
         REGB3 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB3));
         /* ../lib/standard/collection/array.nit:56 */
         REGB0 = REGB3;
       }
       /* ../lib/standard/collection/array.nit:57 */
       REGB3 = TAG_Int(1);
-      /* ../lib/standard/kernel.nit:238 */
+      /* ../lib/standard/kernel.nit:245 */
       REGB3 = TAG_Int(UNTAG_Int(REGB1)+UNTAG_Int(REGB3));
       /* ../lib/standard/collection/array.nit:57 */
       REGB1 = REGB3;
@@ -350,7 +350,7 @@ val_t standard___collection___array___AbstractArrayRead___last_index_of(val_t p0
   REGB0 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
   /* ../lib/standard/collection/array.nit:66 */
   REGB1 = TAG_Int(1);
-  /* ../lib/standard/kernel.nit:240 */
+  /* ../lib/standard/kernel.nit:247 */
   REGB1 = TAG_Int(UNTAG_Int(REGB0)-UNTAG_Int(REGB1));
   /* ../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);
@@ -394,7 +394,7 @@ val_t standard___collection___array___AbstractArrayRead___index_of_from(val_t p0
     } else {
       nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
     }
-    /* ../lib/standard/kernel.nit:235 */
+    /* ../lib/standard/kernel.nit:242 */
     REGB2 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
     /* ../lib/standard/collection/array.nit:74 */
     if (UNTAG_Bool(REGB2)) {
@@ -419,7 +419,7 @@ val_t standard___collection___array___AbstractArrayRead___index_of_from(val_t p0
       }
       /* ../lib/standard/collection/array.nit:78 */
       REGB3 = TAG_Int(1);
-      /* ../lib/standard/kernel.nit:238 */
+      /* ../lib/standard/kernel.nit:245 */
       REGB3 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB3));
       /* ../lib/standard/collection/array.nit:78 */
       REGB0 = REGB3;
@@ -431,7 +431,7 @@ val_t standard___collection___array___AbstractArrayRead___index_of_from(val_t p0
   label2: while(0);
   /* ../lib/standard/collection/array.nit:80 */
   REGB0 = TAG_Int(1);
-  /* ../lib/standard/kernel.nit:239 */
+  /* ../lib/standard/kernel.nit:246 */
   REGB0 = TAG_Int(-UNTAG_Int(REGB0));
   /* ../lib/standard/collection/array.nit:80 */
   REGB2 = REGB0;
@@ -468,7 +468,7 @@ val_t standard___collection___array___AbstractArrayRead___last_index_of_from(val
     } else {
       nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
     }
-    /* ../lib/standard/kernel.nit:236 */
+    /* ../lib/standard/kernel.nit:243 */
     REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
     /* ../lib/standard/collection/array.nit:88 */
     if (UNTAG_Bool(REGB1)) {
@@ -493,7 +493,7 @@ val_t standard___collection___array___AbstractArrayRead___last_index_of_from(val
       } else {
         /* ../lib/standard/collection/array.nit:92 */
         REGB2 = TAG_Int(1);
-        /* ../lib/standard/kernel.nit:240 */
+        /* ../lib/standard/kernel.nit:247 */
         REGB2 = TAG_Int(UNTAG_Int(REGB0)-UNTAG_Int(REGB2));
         /* ../lib/standard/collection/array.nit:92 */
         REGB0 = REGB2;
@@ -506,7 +506,7 @@ val_t standard___collection___array___AbstractArrayRead___last_index_of_from(val
   label2: while(0);
   /* ../lib/standard/collection/array.nit:95 */
   REGB0 = TAG_Int(1);
-  /* ../lib/standard/kernel.nit:239 */
+  /* ../lib/standard/kernel.nit:246 */
   REGB0 = TAG_Int(-UNTAG_Int(REGB0));
   /* ../lib/standard/collection/array.nit:95 */
   REGB1 = REGB0;
@@ -550,13 +550,13 @@ val_t standard___collection___array___AbstractArrayRead___reversed(val_t p0){
     } else {
       nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
     }
-    /* ../lib/standard/kernel.nit:237 */
+    /* ../lib/standard/kernel.nit:244 */
     REGB1 = TAG_Bool(UNTAG_Int(REGB0)>UNTAG_Int(REGB1));
     /* ../lib/standard/collection/array.nit:105 */
     if (UNTAG_Bool(REGB1)) {
       /* ../lib/standard/collection/array.nit:106 */
       REGB1 = TAG_Int(1);
-      /* ../lib/standard/kernel.nit:240 */
+      /* ../lib/standard/kernel.nit:247 */
       REGB1 = TAG_Int(UNTAG_Int(REGB0)-UNTAG_Int(REGB1));
       /* ../lib/standard/collection/array.nit:106 */
       REGB0 = REGB1;
@@ -607,17 +607,17 @@ void standard___collection___array___AbstractArrayRead___copy_to(val_t p0, val_t
     } else {
       nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
     }
-    /* ../lib/standard/kernel.nit:237 */
+    /* ../lib/standard/kernel.nit:244 */
     REGB3 = TAG_Bool(UNTAG_Int(REGB1)>UNTAG_Int(REGB3));
     /* ../lib/standard/collection/array.nit:122 */
     if (UNTAG_Bool(REGB3)) {
       /* ../lib/standard/collection/array.nit:123 */
       REGB3 = TAG_Int(1);
-      /* ../lib/standard/kernel.nit:240 */
+      /* ../lib/standard/kernel.nit:247 */
       REGB3 = TAG_Int(UNTAG_Int(REGB1)-UNTAG_Int(REGB3));
       /* ../lib/standard/collection/array.nit:123 */
       REGB1 = REGB3;
-      /* ../lib/standard/kernel.nit:238 */
+      /* ../lib/standard/kernel.nit:245 */
       REGB3 = TAG_Int(UNTAG_Int(REGB2)+UNTAG_Int(REGB1));
       REGB4 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB1));
       /* ../lib/standard/collection/array.nit:124 */
@@ -666,7 +666,7 @@ void standard___collection___array___AbstractArrayRead___output(val_t p0){
     } else {
       nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
     }
-    /* ../lib/standard/kernel.nit:235 */
+    /* ../lib/standard/kernel.nit:242 */
     REGB2 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
     /* ../lib/standard/collection/array.nit:132 */
     if (UNTAG_Bool(REGB2)) {
@@ -695,7 +695,7 @@ void standard___collection___array___AbstractArrayRead___output(val_t p0){
       }
       /* ../lib/standard/collection/array.nit:135 */
       REGB2 = TAG_Int(1);
-      /* ../lib/standard/kernel.nit:238 */
+      /* ../lib/standard/kernel.nit:245 */
       REGB2 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB2));
       /* ../lib/standard/collection/array.nit:135 */
       REGB0 = REGB2;
@@ -786,7 +786,7 @@ val_t standard___collection___array___AbstractArrayRead_____eqeq(val_t p0, val_t
   REGB3 = TAG_Bool(IS_EQUAL_OO(REGB2,REGB1));
   if (UNTAG_Bool(REGB3)) {
   } else {
-    /* ../lib/standard/kernel.nit:230 */
+    /* ../lib/standard/kernel.nit:237 */
     REGB2 = TAG_Bool((REGB2)==(REGB1));
     /* ../lib/standard/collection/array.nit:146 */
     REGB3 = REGB2;
@@ -806,7 +806,7 @@ val_t standard___collection___array___AbstractArrayRead_____eqeq(val_t p0, val_t
     } else {
       nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
     }
-    /* ../lib/standard/kernel.nit:235 */
+    /* ../lib/standard/kernel.nit:242 */
     REGB2 = TAG_Bool(UNTAG_Int(REGB3)<UNTAG_Int(REGB1));
     /* ../lib/standard/collection/array.nit:148 */
     if (UNTAG_Bool(REGB2)) {
@@ -837,7 +837,7 @@ val_t standard___collection___array___AbstractArrayRead_____eqeq(val_t p0, val_t
       }
       /* ../lib/standard/collection/array.nit:150 */
       REGB2 = TAG_Int(1);
-      /* ../lib/standard/kernel.nit:238 */
+      /* ../lib/standard/kernel.nit:245 */
       REGB2 = TAG_Int(UNTAG_Int(REGB3)+UNTAG_Int(REGB2));
       /* ../lib/standard/collection/array.nit:150 */
       REGB3 = REGB2;
@@ -936,7 +936,7 @@ val_t standard___collection___array___AbstractArray___pop(val_t p0){
   /* ../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:240 */
+  /* ../lib/standard/kernel.nit:247 */
   REGB1 = TAG_Int(UNTAG_Int(REGB0)-UNTAG_Int(REGB1));
   /* ../lib/standard/collection/array.nit:172 */
   ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]) = REGB1;
@@ -989,20 +989,20 @@ val_t standard___collection___array___AbstractArray___shift(val_t p0){
     } else {
       nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
     }
-    /* ../lib/standard/kernel.nit:235 */
+    /* ../lib/standard/kernel.nit:242 */
     REGB2 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
     /* ../lib/standard/collection/array.nit:182 */
     if (UNTAG_Bool(REGB2)) {
       /* ../lib/standard/collection/array.nit:183 */
       REGB2 = TAG_Int(1);
-      /* ../lib/standard/kernel.nit:240 */
+      /* ../lib/standard/kernel.nit:247 */
       REGB2 = TAG_Int(UNTAG_Int(REGB0)-UNTAG_Int(REGB2));
       /* ../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:238 */
+      /* ../lib/standard/kernel.nit:245 */
       REGB2 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB2));
       /* ../lib/standard/collection/array.nit:184 */
       REGB0 = REGB2;
@@ -1014,7 +1014,7 @@ val_t standard___collection___array___AbstractArray___shift(val_t p0){
   label1: while(0);
   /* ../lib/standard/collection/array.nit:186 */
   REGB0 = TAG_Int(1);
-  /* ../lib/standard/kernel.nit:240 */
+  /* ../lib/standard/kernel.nit:247 */
   REGB0 = TAG_Int(UNTAG_Int(REGB1)-UNTAG_Int(REGB0));
   /* ../lib/standard/collection/array.nit:186 */
   ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]) = REGB0;
@@ -1052,7 +1052,7 @@ void standard___collection___array___AbstractArray___unshift(val_t p0, val_t p1)
   REGB0 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
   /* ../lib/standard/collection/array.nit:192 */
   REGB1 = TAG_Int(1);
-  /* ../lib/standard/kernel.nit:240 */
+  /* ../lib/standard/kernel.nit:247 */
   REGB1 = TAG_Int(UNTAG_Int(REGB0)-UNTAG_Int(REGB1));
   /* ../lib/standard/collection/array.nit:193 */
   while(1) {
@@ -1062,20 +1062,20 @@ void standard___collection___array___AbstractArray___unshift(val_t p0, val_t p1)
     } else {
       nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
     }
-    /* ../lib/standard/kernel.nit:237 */
+    /* ../lib/standard/kernel.nit:244 */
     REGB0 = TAG_Bool(UNTAG_Int(REGB1)>UNTAG_Int(REGB0));
     /* ../lib/standard/collection/array.nit:193 */
     if (UNTAG_Bool(REGB0)) {
       /* ../lib/standard/collection/array.nit:194 */
       REGB0 = TAG_Int(1);
-      /* ../lib/standard/kernel.nit:238 */
+      /* ../lib/standard/kernel.nit:245 */
       REGB0 = TAG_Int(UNTAG_Int(REGB1)+UNTAG_Int(REGB0));
       /* ../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:240 */
+      /* ../lib/standard/kernel.nit:247 */
       REGB0 = TAG_Int(UNTAG_Int(REGB1)-UNTAG_Int(REGB0));
       /* ../lib/standard/collection/array.nit:195 */
       REGB1 = REGB0;
@@ -1119,7 +1119,7 @@ void standard___collection___array___AbstractArray___insert(val_t p0, val_t p1,
   REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
   /* ../lib/standard/collection/array.nit:207 */
   REGB2 = TAG_Int(1);
-  /* ../lib/standard/kernel.nit:238 */
+  /* ../lib/standard/kernel.nit:245 */
   REGB2 = TAG_Int(UNTAG_Int(REGB1)+UNTAG_Int(REGB2));
   /* ../lib/standard/collection/array.nit:207 */
   CALL_standard___collection___array___AbstractArray___enlarge(fra.me.REG[0])(fra.me.REG[0], REGB2);
@@ -1130,11 +1130,11 @@ void standard___collection___array___AbstractArray___insert(val_t p0, val_t p1,
     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:240 */
+  /* ../lib/standard/kernel.nit:247 */
   REGB2 = TAG_Int(UNTAG_Int(REGB2)-UNTAG_Int(REGB0));
   /* ../lib/standard/collection/array.nit:208 */
   REGB1 = TAG_Int(1);
-  /* ../lib/standard/kernel.nit:238 */
+  /* ../lib/standard/kernel.nit:245 */
   REGB1 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB1));
   /* ../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);
@@ -1241,7 +1241,7 @@ void standard___collection___array___AbstractArray___remove_all(val_t p0, val_t
     } else {
       nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
     }
-    /* ../lib/standard/kernel.nit:236 */
+    /* ../lib/standard/kernel.nit:243 */
     REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
     /* ../lib/standard/collection/array.nit:221 */
     if (UNTAG_Bool(REGB1)) {
@@ -1292,7 +1292,7 @@ void standard___collection___array___AbstractArray___remove_at(val_t p0, val_t p
   } else {
     nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
   }
-  /* ../lib/standard/kernel.nit:236 */
+  /* ../lib/standard/kernel.nit:243 */
   REGB2 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB2));
   /* ../lib/standard/collection/array.nit:230 */
   if (UNTAG_Bool(REGB2)) {
@@ -1301,7 +1301,7 @@ void standard___collection___array___AbstractArray___remove_at(val_t p0, val_t p
     } else {
       nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
     }
-    /* ../lib/standard/kernel.nit:235 */
+    /* ../lib/standard/kernel.nit:242 */
     REGB2 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
   } else {
     /* ../lib/standard/collection/array.nit:230 */
@@ -1311,7 +1311,7 @@ void standard___collection___array___AbstractArray___remove_at(val_t p0, val_t p
   if (UNTAG_Bool(REGB2)) {
     /* ../lib/standard/collection/array.nit:231 */
     REGB2 = TAG_Int(1);
-    /* ../lib/standard/kernel.nit:238 */
+    /* ../lib/standard/kernel.nit:245 */
     REGB2 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB2));
     /* ../lib/standard/collection/array.nit:232 */
     while(1) {
@@ -1320,20 +1320,20 @@ void standard___collection___array___AbstractArray___remove_at(val_t p0, val_t p
       } else {
         nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
       }
-      /* ../lib/standard/kernel.nit:235 */
+      /* ../lib/standard/kernel.nit:242 */
       REGB0 = TAG_Bool(UNTAG_Int(REGB2)<UNTAG_Int(REGB1));
       /* ../lib/standard/collection/array.nit:232 */
       if (UNTAG_Bool(REGB0)) {
         /* ../lib/standard/collection/array.nit:233 */
         REGB0 = TAG_Int(1);
-        /* ../lib/standard/kernel.nit:240 */
+        /* ../lib/standard/kernel.nit:247 */
         REGB0 = TAG_Int(UNTAG_Int(REGB2)-UNTAG_Int(REGB0));
         /* ../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:238 */
+        /* ../lib/standard/kernel.nit:245 */
         REGB0 = TAG_Int(UNTAG_Int(REGB2)+UNTAG_Int(REGB0));
         /* ../lib/standard/collection/array.nit:234 */
         REGB2 = REGB0;
@@ -1345,7 +1345,7 @@ void standard___collection___array___AbstractArray___remove_at(val_t p0, val_t p
     label1: while(0);
     /* ../lib/standard/collection/array.nit:236 */
     REGB2 = TAG_Int(1);
-    /* ../lib/standard/kernel.nit:240 */
+    /* ../lib/standard/kernel.nit:247 */
     REGB2 = TAG_Int(UNTAG_Int(REGB1)-UNTAG_Int(REGB2));
     /* ../lib/standard/collection/array.nit:236 */
     ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]) = REGB2;
@@ -1355,7 +1355,7 @@ void standard___collection___array___AbstractArray___remove_at(val_t p0, val_t p
 }
 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;
+  struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
   val_t REGB0;
   val_t REGB1;
   val_t tmp;
@@ -1364,17 +1364,19 @@ void standard___collection___array___AbstractArray___swap_at(val_t p0, val_t p1,
   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.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;
   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);
+  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: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;
@@ -1390,7 +1392,7 @@ void standard___collection___array___Array___iterate(val_t p0, struct stack_fram
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 266;
+  fra.me.line = 267;
   fra.me.meth = LOCATE_standard___collection___array___Array___iterate;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
@@ -1402,18 +1404,18 @@ 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:269 */
-  REGB0 = TAG_Int(0);
   /* ../lib/standard/collection/array.nit:270 */
+  REGB0 = TAG_Int(0);
+  /* ../lib/standard/collection/array.nit:271 */
   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);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 271);
   }
   REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-  /* ../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:272 */
+  fra.me.REG[1] = ATTR_standard___collection___array___Array____items(fra.me.REG[0]);
+  /* ../lib/standard/collection/array.nit:273 */
   while(1) {
     /* ../lib/standard/collection/array.nit:24 */
     REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
@@ -1427,30 +1429,30 @@ void standard___collection___array___Array___iterate(val_t p0, struct stack_fram
     } else {
       nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
     }
-    /* ../lib/standard/kernel.nit:235 */
+    /* ../lib/standard/kernel.nit:242 */
     REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
-    /* ../lib/standard/collection/array.nit:272 */
+    /* ../lib/standard/collection/array.nit:273 */
     if (UNTAG_Bool(REGB1)) {
-      /* ../lib/standard/collection/array.nit:273 */
+      /* ../lib/standard/collection/array.nit:274 */
       REGB1 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
       if (UNTAG_Bool(REGB1)) {
-        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 273);
+        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 274);
       }
-      /* ../lib/standard/collection/array.nit:724 */
+      /* ../lib/standard/collection/array.nit:725 */
       fra.me.REG[2] = ((Nit_NativeArray)fra.me.REG[1])->val[UNTAG_Int(REGB0)];
-      /* ../lib/standard/collection/array.nit:273 */
+      /* ../lib/standard/collection/array.nit:274 */
       ((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:274 */
+      /* ../lib/standard/collection/array.nit:275 */
       REGB1 = TAG_Int(1);
-      /* ../lib/standard/kernel.nit:238 */
+      /* ../lib/standard/kernel.nit:245 */
       REGB1 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB1));
-      /* ../lib/standard/collection/array.nit:274 */
+      /* ../lib/standard/collection/array.nit:275 */
       REGB0 = REGB1;
     } else {
-      /* ../lib/standard/collection/array.nit:272 */
+      /* ../lib/standard/collection/array.nit:273 */
       goto label2;
     }
   }
@@ -1468,7 +1470,7 @@ 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 = 278;
+  fra.me.line = 279;
   fra.me.meth = LOCATE_standard___collection___array___Array_____bra;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
@@ -1476,21 +1478,21 @@ val_t standard___collection___array___Array_____bra(val_t p0, val_t p1){
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
   REGB0 = p1;
-  /* ../lib/standard/collection/array.nit:280 */
+  /* ../lib/standard/collection/array.nit:281 */
   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 */
+  /* ../lib/standard/kernel.nit:243 */
   REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-  /* ../lib/standard/collection/array.nit:280 */
+  /* ../lib/standard/collection/array.nit:281 */
   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, 280);
+      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 281);
     }
     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*/;
@@ -1498,26 +1500,26 @@ val_t standard___collection___array___Array_____bra(val_t p0, val_t p1){
     } else {
       nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
     }
-    /* ../lib/standard/kernel.nit:235 */
+    /* ../lib/standard/kernel.nit:242 */
     REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
   } else {
-    /* ../lib/standard/collection/array.nit:280 */
+    /* ../lib/standard/collection/array.nit:281 */
     REGB2 = TAG_Bool(0);
     REGB1 = REGB2;
   }
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
+    nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 281);
   }
-  /* ../lib/standard/collection/array.nit:281 */
+  /* ../lib/standard/collection/array.nit:282 */
   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);
+    nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 282);
   }
-  /* ../lib/standard/collection/array.nit:724 */
+  /* ../lib/standard/collection/array.nit:725 */
   fra.me.REG[0] = ((Nit_NativeArray)fra.me.REG[0])->val[UNTAG_Int(REGB0)];
-  /* ../lib/standard/collection/array.nit:281 */
+  /* ../lib/standard/collection/array.nit:282 */
   goto label1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
@@ -1532,7 +1534,7 @@ 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 = 284;
+  fra.me.line = 285;
   fra.me.meth = LOCATE_standard___collection___array___Array_____braeq;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
@@ -1542,47 +1544,47 @@ void standard___collection___array___Array_____braeq(val_t p0, val_t p1, val_t p
   fra.me.REG[0] = p0;
   REGB0 = p1;
   fra.me.REG[1] = p2;
-  /* ../lib/standard/collection/array.nit:286 */
+  /* ../lib/standard/collection/array.nit:287 */
   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 */
+  /* ../lib/standard/kernel.nit:243 */
   REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-  /* ../lib/standard/collection/array.nit:286 */
+  /* ../lib/standard/collection/array.nit:287 */
   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, 286);
+      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 287);
     }
     REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
     REGB2 = TAG_Int(1);
-    /* ../lib/standard/kernel.nit:238 */
+    /* ../lib/standard/kernel.nit:245 */
     REGB2 = TAG_Int(UNTAG_Int(REGB1)+UNTAG_Int(REGB2));
     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 */
+    /* ../lib/standard/kernel.nit:242 */
     REGB2 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB2));
   } else {
-    /* ../lib/standard/collection/array.nit:286 */
+    /* ../lib/standard/collection/array.nit:287 */
     REGB1 = TAG_Bool(0);
     REGB2 = REGB1;
   }
   if (UNTAG_Bool(REGB2)) {
   } else {
-    nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 286);
+    nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 287);
   }
-  /* ../lib/standard/collection/array.nit:287 */
+  /* ../lib/standard/collection/array.nit:288 */
   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, 287);
+    nit_abort("Uninitialized attribute %s", "_capacity", LOCATE_standard___collection___array, 288);
   }
   REGB2 = ATTR_standard___collection___array___Array____capacity(fra.me.REG[0]);
   REGB1 = TAG_Bool(VAL_ISA(REGB0, VTCOLOR_standard___kernel___Comparable___OTHER(REGB2), VTID_standard___kernel___Comparable___OTHER(REGB2))) /*cast OTHER*/;
@@ -1590,22 +1592,22 @@ void standard___collection___array___Array_____braeq(val_t p0, val_t p1, val_t p
   } else {
     nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
   }
-  /* ../lib/standard/kernel.nit:234 */
+  /* ../lib/standard/kernel.nit:241 */
   REGB2 = TAG_Bool(UNTAG_Int(REGB2)<=UNTAG_Int(REGB0));
-  /* ../lib/standard/collection/array.nit:287 */
+  /* ../lib/standard/collection/array.nit:288 */
   if (UNTAG_Bool(REGB2)) {
-    /* ../lib/standard/collection/array.nit:288 */
+    /* ../lib/standard/collection/array.nit:289 */
     REGB2 = TAG_Int(1);
-    /* ../lib/standard/kernel.nit:238 */
+    /* ../lib/standard/kernel.nit:245 */
     REGB2 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB2));
-    /* ../lib/standard/collection/array.nit:288 */
+    /* ../lib/standard/collection/array.nit:289 */
     CALL_standard___collection___array___AbstractArray___enlarge(fra.me.REG[0])(fra.me.REG[0], REGB2);
   }
-  /* ../lib/standard/collection/array.nit:290 */
+  /* ../lib/standard/collection/array.nit:291 */
   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, 290);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 291);
   }
   REGB2 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
   REGB1 = TAG_Bool(VAL_ISA(REGB0, VTCOLOR_standard___kernel___Comparable___OTHER(REGB2), VTID_standard___kernel___Comparable___OTHER(REGB2))) /*cast OTHER*/;
@@ -1613,24 +1615,24 @@ void standard___collection___array___Array_____braeq(val_t p0, val_t p1, val_t p
   } else {
     nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
   }
-  /* ../lib/standard/kernel.nit:234 */
+  /* ../lib/standard/kernel.nit:241 */
   REGB2 = TAG_Bool(UNTAG_Int(REGB2)<=UNTAG_Int(REGB0));
-  /* ../lib/standard/collection/array.nit:290 */
+  /* ../lib/standard/collection/array.nit:291 */
   if (UNTAG_Bool(REGB2)) {
-    /* ../lib/standard/collection/array.nit:291 */
+    /* ../lib/standard/collection/array.nit:292 */
     REGB2 = TAG_Int(1);
-    /* ../lib/standard/kernel.nit:238 */
+    /* ../lib/standard/kernel.nit:245 */
     REGB2 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB2));
-    /* ../lib/standard/collection/array.nit:291 */
+    /* ../lib/standard/collection/array.nit:292 */
     ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]) = REGB2;
   }
-  /* ../lib/standard/collection/array.nit:293 */
+  /* ../lib/standard/collection/array.nit:294 */
   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, 293);
+    nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 294);
   }
-  /* ../lib/standard/collection/array.nit:725 */
+  /* ../lib/standard/collection/array.nit:726 */
   ((Nit_NativeArray)fra.me.REG[0])->val[UNTAG_Int(REGB0)]=fra.me.REG[1];
   stack_frame_head = fra.me.prev;
   return;
@@ -1644,7 +1646,7 @@ void standard___collection___array___Array___add(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 = 296;
+  fra.me.line = 297;
   fra.me.meth = LOCATE_standard___collection___array___Array___add;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
@@ -1653,18 +1655,18 @@ void standard___collection___array___Array___add(val_t p0, val_t p1){
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ../lib/standard/collection/array.nit:298 */
+  /* ../lib/standard/collection/array.nit:299 */
   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, 298);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 299);
   }
   REGB0 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]);
-  /* ../lib/standard/collection/array.nit:299 */
+  /* ../lib/standard/collection/array.nit:300 */
   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, 299);
+    nit_abort("Uninitialized attribute %s", "_capacity", LOCATE_standard___collection___array, 300);
   }
   REGB1 = ATTR_standard___collection___array___Array____capacity(fra.me.REG[0]);
   REGB2 = TAG_Bool(VAL_ISA(REGB0, VTCOLOR_standard___kernel___Comparable___OTHER(REGB1), VTID_standard___kernel___Comparable___OTHER(REGB1))) /*cast OTHER*/;
@@ -1672,30 +1674,30 @@ void standard___collection___array___Array___add(val_t p0, val_t p1){
   } else {
     nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
   }
-  /* ../lib/standard/kernel.nit:234 */
+  /* ../lib/standard/kernel.nit:241 */
   REGB1 = TAG_Bool(UNTAG_Int(REGB1)<=UNTAG_Int(REGB0));
-  /* ../lib/standard/collection/array.nit:299 */
+  /* ../lib/standard/collection/array.nit:300 */
   if (UNTAG_Bool(REGB1)) {
-    /* ../lib/standard/collection/array.nit:300 */
+    /* ../lib/standard/collection/array.nit:301 */
     REGB1 = TAG_Int(1);
-    /* ../lib/standard/kernel.nit:238 */
+    /* ../lib/standard/kernel.nit:245 */
     REGB1 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB1));
-    /* ../lib/standard/collection/array.nit:300 */
+    /* ../lib/standard/collection/array.nit:301 */
     CALL_standard___collection___array___AbstractArray___enlarge(fra.me.REG[0])(fra.me.REG[0], REGB1);
   }
-  /* ../lib/standard/collection/array.nit:302 */
+  /* ../lib/standard/collection/array.nit:303 */
   REGB1 = TAG_Int(1);
-  /* ../lib/standard/kernel.nit:238 */
+  /* ../lib/standard/kernel.nit:245 */
   REGB1 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB1));
-  /* ../lib/standard/collection/array.nit:302 */
-  ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]) = REGB1;
   /* ../lib/standard/collection/array.nit:303 */
+  ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]) = REGB1;
+  /* ../lib/standard/collection/array.nit:304 */
   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, 303);
+    nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 304);
   }
-  /* ../lib/standard/collection/array.nit:725 */
+  /* ../lib/standard/collection/array.nit:726 */
   ((Nit_NativeArray)fra.me.REG[0])->val[UNTAG_Int(REGB0)]=fra.me.REG[1];
   stack_frame_head = fra.me.prev;
   return;
@@ -1710,7 +1712,7 @@ 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 = 306;
+  fra.me.line = 307;
   fra.me.meth = LOCATE_standard___collection___array___Array___enlarge;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
@@ -1720,11 +1722,11 @@ void standard___collection___array___Array___enlarge(val_t p0, val_t p1){
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   REGB0 = p1;
-  /* ../lib/standard/collection/array.nit:308 */
+  /* ../lib/standard/collection/array.nit:309 */
   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, 308);
+    nit_abort("Uninitialized attribute %s", "_capacity", LOCATE_standard___collection___array, 309);
   }
   REGB1 = ATTR_standard___collection___array___Array____capacity(fra.me.REG[0]);
   REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
@@ -1732,44 +1734,44 @@ void standard___collection___array___Array___enlarge(val_t p0, val_t p1){
   } else {
     nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
   }
-  /* ../lib/standard/kernel.nit:234 */
+  /* ../lib/standard/kernel.nit:241 */
   REGB2 = TAG_Bool(UNTAG_Int(REGB0)<=UNTAG_Int(REGB1));
-  /* ../lib/standard/collection/array.nit:309 */
+  /* ../lib/standard/collection/array.nit:310 */
   if (UNTAG_Bool(REGB2)) {
     goto label1;
   }
-  /* ../lib/standard/collection/array.nit:310 */
+  /* ../lib/standard/collection/array.nit:311 */
   while(1) {
     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 */
+    /* ../lib/standard/kernel.nit:241 */
     REGB2 = TAG_Bool(UNTAG_Int(REGB1)<=UNTAG_Int(REGB0));
-    /* ../lib/standard/collection/array.nit:310 */
+    /* ../lib/standard/collection/array.nit:311 */
     if (UNTAG_Bool(REGB2)) {
       REGB2 = TAG_Int(2);
-      /* ../lib/standard/kernel.nit:241 */
+      /* ../lib/standard/kernel.nit:248 */
       REGB2 = TAG_Int(UNTAG_Int(REGB1)*UNTAG_Int(REGB2));
-      /* ../lib/standard/collection/array.nit:310 */
+      /* ../lib/standard/collection/array.nit:311 */
       REGB3 = TAG_Int(2);
-      /* ../lib/standard/kernel.nit:238 */
+      /* ../lib/standard/kernel.nit:245 */
       REGB3 = TAG_Int(UNTAG_Int(REGB2)+UNTAG_Int(REGB3));
-      /* ../lib/standard/collection/array.nit:310 */
+      /* ../lib/standard/collection/array.nit:311 */
       REGB1 = REGB3;
     } else {
       goto label2;
     }
   }
   label2: while(0);
-  /* ../lib/standard/collection/array.nit:718 */
+  /* ../lib/standard/collection/array.nit:719 */
   fra.me.REG[1] = NEW_NativeArray(UNTAG_Int(REGB1), sizeof(val_t));
-  /* ../lib/standard/collection/array.nit:312 */
+  /* ../lib/standard/collection/array.nit:313 */
   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, 312);
+    nit_abort("Uninitialized attribute %s", "_capacity", LOCATE_standard___collection___array, 313);
   }
   REGB0 = ATTR_standard___collection___array___Array____capacity(fra.me.REG[0]);
   REGB3 = TAG_Int(0);
@@ -1778,27 +1780,27 @@ void standard___collection___array___Array___enlarge(val_t p0, val_t p1){
   } else {
     nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
   }
-  /* ../lib/standard/kernel.nit:237 */
+  /* ../lib/standard/kernel.nit:244 */
   REGB3 = TAG_Bool(UNTAG_Int(REGB0)>UNTAG_Int(REGB3));
-  /* ../lib/standard/collection/array.nit:312 */
+  /* ../lib/standard/collection/array.nit:313 */
   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, 312);
+      nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 313);
     }
     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, 312);
+      nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 313);
     }
-    /* ../lib/standard/collection/array.nit:726 */
+    /* ../lib/standard/collection/array.nit:727 */
     (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:313 */
-  ATTR_standard___collection___array___Array____items(fra.me.REG[0]) = fra.me.REG[1];
   /* ../lib/standard/collection/array.nit:314 */
+  ATTR_standard___collection___array___Array____items(fra.me.REG[0]) = fra.me.REG[1];
+  /* ../lib/standard/collection/array.nit:315 */
   ATTR_standard___collection___array___Array____capacity(fra.me.REG[0]) = REGB1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
@@ -1813,17 +1815,17 @@ 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 = 317;
+  fra.me.line = 318;
   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:320 */
+  /* ../lib/standard/collection/array.nit:321 */
   REGB0 = TAG_Int(0);
   ATTR_standard___collection___array___Array____capacity(fra.me.REG[0]) = REGB0;
-  /* ../lib/standard/collection/array.nit:321 */
+  /* ../lib/standard/collection/array.nit:322 */
   REGB0 = TAG_Int(0);
   ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]) = REGB0;
   stack_frame_head = fra.me.prev;
@@ -1839,7 +1841,7 @@ void standard___collection___array___Array___from(val_t p0, val_t p1, int* init_
   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 = 324;
+  fra.me.line = 325;
   fra.me.meth = LOCATE_standard___collection___array___Array___from;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
@@ -1848,10 +1850,10 @@ void standard___collection___array___Array___from(val_t p0, val_t p1, int* init_
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ../lib/standard/collection/array.nit:326 */
+  /* ../lib/standard/collection/array.nit:327 */
   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 */
+  /* ../lib/standard/collection/array.nit:328 */
   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;
@@ -1866,7 +1868,7 @@ void standard___collection___array___Array___with_items(val_t p0, val_t p1, int*
   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.line = 331;
   fra.me.meth = LOCATE_standard___collection___array___Array___with_items;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
@@ -1876,21 +1878,21 @@ void standard___collection___array___Array___with_items(val_t p0, val_t p1, int*
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ../lib/standard/collection/array.nit:330 */
+  /* ../lib/standard/collection/array.nit:331 */
   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, 330);
+    nit_abort("Cast failed", NULL, LOCATE_standard___collection___array, 331);
   }
-  /* ../lib/standard/collection/array.nit:333 */
+  /* ../lib/standard/collection/array.nit:334 */
   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 */
+  /* ../lib/standard/collection/array.nit:335 */
   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, 334);
+    nit_abort("Uninitialized attribute %s", "_capacity", LOCATE_standard___collection___array, 335);
   }
   REGB0 = ATTR_standard___collection___array___Array____capacity(fra.me.REG[1]);
   ATTR_standard___collection___array___Array____capacity(fra.me.REG[2]) = REGB0;
@@ -1901,7 +1903,7 @@ void standard___collection___array___Array___with_items(val_t p0, val_t p1, int*
     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:335 */
+  /* ../lib/standard/collection/array.nit:336 */
   ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]) = REGB0;
   stack_frame_head = fra.me.prev;
   init_table[itpos3] = 1;
@@ -1918,7 +1920,7 @@ void standard___collection___array___Array___with_capacity(val_t p0, val_t p1, i
   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 = 338;
+  fra.me.line = 339;
   fra.me.meth = LOCATE_standard___collection___array___Array___with_capacity;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
@@ -1927,27 +1929,27 @@ void standard___collection___array___Array___with_capacity(val_t p0, val_t p1, i
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   REGB0 = p1;
-  /* ../lib/standard/collection/array.nit:341 */
+  /* ../lib/standard/collection/array.nit:342 */
   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 */
+  /* ../lib/standard/kernel.nit:243 */
   REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-  /* ../lib/standard/collection/array.nit:341 */
+  /* ../lib/standard/collection/array.nit:342 */
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Assert '%s' failed", "positive", LOCATE_standard___collection___array, 341);
+    nit_abort("Assert '%s' failed", "positive", LOCATE_standard___collection___array, 342);
   }
-  /* ../lib/standard/collection/array.nit:718 */
+  /* ../lib/standard/collection/array.nit:719 */
   fra.me.REG[1] = NEW_NativeArray(UNTAG_Int(REGB0), sizeof(val_t));
-  /* ../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:343 */
-  ATTR_standard___collection___array___Array____capacity(fra.me.REG[0]) = REGB0;
+  ATTR_standard___collection___array___Array____items(fra.me.REG[0]) = fra.me.REG[1];
   /* ../lib/standard/collection/array.nit:344 */
+  ATTR_standard___collection___array___Array____capacity(fra.me.REG[0]) = REGB0;
+  /* ../lib/standard/collection/array.nit:345 */
   REGB0 = TAG_Int(0);
   ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]) = REGB0;
   stack_frame_head = fra.me.prev;
@@ -1965,7 +1967,7 @@ void standard___collection___array___Array___filled_with(val_t p0, val_t p1, val
   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 = 347;
+  fra.me.line = 348;
   fra.me.meth = LOCATE_standard___collection___array___Array___filled_with;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
@@ -1976,51 +1978,51 @@ void standard___collection___array___Array___filled_with(val_t p0, val_t p1, val
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
   REGB0 = p2;
-  /* ../lib/standard/collection/array.nit:350 */
+  /* ../lib/standard/collection/array.nit:351 */
   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 */
+  /* ../lib/standard/kernel.nit:243 */
   REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-  /* ../lib/standard/collection/array.nit:350 */
+  /* ../lib/standard/collection/array.nit:351 */
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Assert '%s' failed", "positive", LOCATE_standard___collection___array, 350);
+    nit_abort("Assert '%s' failed", "positive", LOCATE_standard___collection___array, 351);
   }
-  /* ../lib/standard/collection/array.nit:718 */
+  /* ../lib/standard/collection/array.nit:719 */
   fra.me.REG[2] = NEW_NativeArray(UNTAG_Int(REGB0), sizeof(val_t));
-  /* ../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:352 */
-  ATTR_standard___collection___array___Array____capacity(fra.me.REG[0]) = REGB0;
+  ATTR_standard___collection___array___Array____items(fra.me.REG[0]) = fra.me.REG[2];
   /* ../lib/standard/collection/array.nit:353 */
-  ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]) = REGB0;
+  ATTR_standard___collection___array___Array____capacity(fra.me.REG[0]) = REGB0;
   /* ../lib/standard/collection/array.nit:354 */
-  REGB1 = TAG_Int(0);
+  ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]) = REGB0;
   /* ../lib/standard/collection/array.nit:355 */
+  REGB1 = TAG_Int(0);
+  /* ../lib/standard/collection/array.nit:356 */
   while(1) {
     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 */
+    /* ../lib/standard/kernel.nit:242 */
     REGB2 = TAG_Bool(UNTAG_Int(REGB1)<UNTAG_Int(REGB0));
-    /* ../lib/standard/collection/array.nit:355 */
+    /* ../lib/standard/collection/array.nit:356 */
     if (UNTAG_Bool(REGB2)) {
-      /* ../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 */
+      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:358 */
       REGB2 = TAG_Int(1);
-      /* ../lib/standard/kernel.nit:238 */
+      /* ../lib/standard/kernel.nit:245 */
       REGB2 = TAG_Int(UNTAG_Int(REGB1)+UNTAG_Int(REGB2));
-      /* ../lib/standard/collection/array.nit:357 */
+      /* ../lib/standard/collection/array.nit:358 */
       REGB1 = REGB2;
     } else {
-      /* ../lib/standard/collection/array.nit:355 */
+      /* ../lib/standard/collection/array.nit:356 */
       goto label1;
     }
   }
@@ -2040,7 +2042,7 @@ void standard___collection___array___Array___with_native(val_t p0, val_t p1, val
   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 = 361;
+  fra.me.line = 362;
   fra.me.meth = LOCATE_standard___collection___array___Array___with_native;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
@@ -2050,25 +2052,25 @@ void standard___collection___array___Array___with_native(val_t p0, val_t p1, val
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
   REGB0 = p2;
-  /* ../lib/standard/collection/array.nit:364 */
+  /* ../lib/standard/collection/array.nit:365 */
   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 */
+  /* ../lib/standard/kernel.nit:243 */
   REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-  /* ../lib/standard/collection/array.nit:364 */
+  /* ../lib/standard/collection/array.nit:365 */
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Assert '%s' failed", "positive", LOCATE_standard___collection___array, 364);
+    nit_abort("Assert '%s' failed", "positive", LOCATE_standard___collection___array, 365);
   }
-  /* ../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:366 */
-  ATTR_standard___collection___array___Array____capacity(fra.me.REG[0]) = REGB0;
+  ATTR_standard___collection___array___Array____items(fra.me.REG[0]) = fra.me.REG[1];
   /* ../lib/standard/collection/array.nit:367 */
+  ATTR_standard___collection___array___Array____capacity(fra.me.REG[0]) = REGB0;
+  /* ../lib/standard/collection/array.nit:368 */
   ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0]) = REGB0;
   stack_frame_head = fra.me.prev;
   init_table[itpos6] = 1;
@@ -2081,7 +2083,7 @@ val_t standard___collection___array___Array___intern_items(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 = 373;
+  fra.me.line = 374;
   fra.me.meth = LOCATE_standard___collection___array___Array___intern_items;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
@@ -2089,14 +2091,14 @@ val_t standard___collection___array___Array___intern_items(val_t p0){
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ../lib/standard/collection/array.nit:373 */
+  /* ../lib/standard/collection/array.nit:374 */
   fra.me.REG[1] = fra.me.REG[0];
-  /* ../lib/standard/collection/array.nit:375 */
+  /* ../lib/standard/collection/array.nit:376 */
   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, 375);
+    nit_abort("Cast failed", NULL, LOCATE_standard___collection___array, 376);
   }
   goto label1;
   label1: while(0);
@@ -2113,7 +2115,7 @@ 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 = 380;
+  fra.me.line = 381;
   fra.me.meth = LOCATE_standard___collection___array___Array___sort;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
@@ -2123,7 +2125,7 @@ void standard___collection___array___Array___sort(val_t p0, struct stack_frame_t
   fra.me.closure_funs = CREG;
   fra.me.REG[0] = p0;
   CREG[0] = clos_fun0;
-  /* ../lib/standard/collection/array.nit:384 */
+  /* ../lib/standard/collection/array.nit:385 */
   REGB0 = TAG_Int(0);
   /* ../lib/standard/collection/array.nit:24 */
   REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
@@ -2132,9 +2134,9 @@ void standard___collection___array___Array___sort(val_t p0, struct stack_frame_t
     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:384 */
+  /* ../lib/standard/collection/array.nit:385 */
   REGB2 = TAG_Int(1);
-  /* ../lib/standard/kernel.nit:240 */
+  /* ../lib/standard/kernel.nit:247 */
   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) {
@@ -2149,10 +2151,10 @@ 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:384 */
+    /* ../lib/standard/collection/array.nit:385 */
     fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
     fra.me.file = LOCATE_standard___collection___array;
-    fra.me.line = 384;
+    fra.me.line = 385;
     fra.me.meth = LOCATE_standard___collection___array___Array___sort;
     fra.me.has_broke = 0;
     fra.me.REG_size = 2;
@@ -2185,7 +2187,7 @@ 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 = 387;
+  fra.me.line = 388;
   fra.me.meth = LOCATE_standard___collection___array___Array___sub_sort;
   fra.me.has_broke = 0;
   fra.me.REG_size = 4;
@@ -2205,44 +2207,44 @@ void standard___collection___array___Array___sub_sort(val_t p0, val_t p1, val_t
   } else {
     nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
   }
-  /* ../lib/standard/kernel.nit:236 */
+  /* ../lib/standard/kernel.nit:243 */
   REGB2 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-  /* ../lib/standard/collection/array.nit:391 */
+  /* ../lib/standard/collection/array.nit:392 */
   if (UNTAG_Bool(REGB2)) {
-    /* ../lib/standard/collection/array.nit:392 */
+    /* ../lib/standard/collection/array.nit:393 */
     goto label1;
   } else {
-    /* ../lib/standard/collection/array.nit:393 */
+    /* ../lib/standard/collection/array.nit:394 */
     REGB2 = TAG_Int(7);
-    /* ../lib/standard/kernel.nit:238 */
+    /* ../lib/standard/kernel.nit:245 */
     REGB2 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB2));
     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 */
+    /* ../lib/standard/kernel.nit:242 */
     REGB2 = TAG_Bool(UNTAG_Int(REGB2)<UNTAG_Int(REGB1));
-    /* ../lib/standard/collection/array.nit:393 */
+    /* ../lib/standard/collection/array.nit:394 */
     if (UNTAG_Bool(REGB2)) {
-      /* ../lib/standard/collection/array.nit:278 */
+      /* ../lib/standard/collection/array.nit:279 */
       fra.me.REG[1] = fra.me.REG[0];
       REGB2 = REGB0;
-      /* ../lib/standard/collection/array.nit:280 */
+      /* ../lib/standard/collection/array.nit:281 */
       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 {
         nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
       }
-      /* ../lib/standard/kernel.nit:236 */
+      /* ../lib/standard/kernel.nit:243 */
       REGB3 = TAG_Bool(UNTAG_Int(REGB2)>=UNTAG_Int(REGB3));
-      /* ../lib/standard/collection/array.nit:280 */
+      /* ../lib/standard/collection/array.nit:281 */
       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, 280);
+          nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 281);
         }
         REGB3 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[1]);
         REGB4 = TAG_Bool(VAL_ISA(REGB3, VTCOLOR_standard___kernel___Comparable___OTHER(REGB2), VTID_standard___kernel___Comparable___OTHER(REGB2))) /*cast OTHER*/;
@@ -2250,72 +2252,72 @@ void standard___collection___array___Array___sub_sort(val_t p0, val_t p1, val_t
         } else {
           nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
         }
-        /* ../lib/standard/kernel.nit:235 */
+        /* ../lib/standard/kernel.nit:242 */
         REGB3 = TAG_Bool(UNTAG_Int(REGB2)<UNTAG_Int(REGB3));
       } else {
-        /* ../lib/standard/collection/array.nit:280 */
+        /* ../lib/standard/collection/array.nit:281 */
         REGB4 = TAG_Bool(0);
         REGB3 = REGB4;
       }
       if (UNTAG_Bool(REGB3)) {
       } else {
-        nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
+        nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 281);
       }
-      /* ../lib/standard/collection/array.nit:281 */
+      /* ../lib/standard/collection/array.nit:282 */
       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, 281);
+        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 282);
       }
-      /* ../lib/standard/collection/array.nit:724 */
+      /* ../lib/standard/collection/array.nit:725 */
       fra.me.REG[1] = ((Nit_NativeArray)fra.me.REG[1])->val[UNTAG_Int(REGB2)];
-      /* ../lib/standard/collection/array.nit:281 */
+      /* ../lib/standard/collection/array.nit:282 */
       goto label2;
       label2: while(0);
-      /* ../lib/standard/collection/array.nit:395 */
-      REGB2 = REGB0;
       /* ../lib/standard/collection/array.nit:396 */
-      REGB3 = REGB1;
+      REGB2 = REGB0;
       /* ../lib/standard/collection/array.nit:397 */
+      REGB3 = REGB1;
+      /* ../lib/standard/collection/array.nit:398 */
       while(1) {
         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 */
+        /* ../lib/standard/kernel.nit:244 */
         REGB4 = TAG_Bool(UNTAG_Int(REGB3)>UNTAG_Int(REGB2));
-        /* ../lib/standard/collection/array.nit:397 */
+        /* ../lib/standard/collection/array.nit:398 */
         if (UNTAG_Bool(REGB4)) {
-          /* ../lib/standard/collection/array.nit:398 */
+          /* ../lib/standard/collection/array.nit:399 */
           while(1) {
             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 */
+            /* ../lib/standard/kernel.nit:241 */
             REGB4 = TAG_Bool(UNTAG_Int(REGB2)<=UNTAG_Int(REGB1));
-            /* ../lib/standard/collection/array.nit:398 */
+            /* ../lib/standard/collection/array.nit:399 */
             if (UNTAG_Bool(REGB4)) {
-              /* ../lib/standard/collection/array.nit:278 */
+              /* ../lib/standard/collection/array.nit:279 */
               fra.me.REG[2] = fra.me.REG[0];
               REGB4 = REGB2;
-              /* ../lib/standard/collection/array.nit:280 */
+              /* ../lib/standard/collection/array.nit:281 */
               REGB5 = TAG_Int(0);
               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 */
+              /* ../lib/standard/kernel.nit:243 */
               REGB5 = TAG_Bool(UNTAG_Int(REGB4)>=UNTAG_Int(REGB5));
-              /* ../lib/standard/collection/array.nit:280 */
+              /* ../lib/standard/collection/array.nit:281 */
               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, 280);
+               nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 281);
                }
                REGB5 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
                REGB6 = TAG_Bool(VAL_ISA(REGB5, VTCOLOR_standard___kernel___Comparable___OTHER(REGB4), VTID_standard___kernel___Comparable___OTHER(REGB4))) /*cast OTHER*/;
@@ -2323,29 +2325,29 @@ void standard___collection___array___Array___sub_sort(val_t p0, val_t p1, val_t
                } else {
                nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
                }
-               /* ../lib/standard/kernel.nit:235 */
+               /* ../lib/standard/kernel.nit:242 */
                REGB5 = TAG_Bool(UNTAG_Int(REGB4)<UNTAG_Int(REGB5));
               } else {
-               /* ../lib/standard/collection/array.nit:280 */
+               /* ../lib/standard/collection/array.nit:281 */
                REGB6 = TAG_Bool(0);
                REGB5 = REGB6;
               }
               if (UNTAG_Bool(REGB5)) {
               } else {
-               nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
+               nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 281);
               }
-              /* ../lib/standard/collection/array.nit:281 */
+              /* ../lib/standard/collection/array.nit:282 */
               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, 281);
+               nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 282);
               }
-              /* ../lib/standard/collection/array.nit:724 */
+              /* ../lib/standard/collection/array.nit:725 */
               fra.me.REG[2] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB4)];
-              /* ../lib/standard/collection/array.nit:281 */
+              /* ../lib/standard/collection/array.nit:282 */
               goto label3;
               label3: while(0);
-              /* ../lib/standard/collection/array.nit:398 */
+              /* ../lib/standard/collection/array.nit:399 */
               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;
@@ -2356,53 +2358,53 @@ void standard___collection___array___Array___sub_sort(val_t p0, val_t p1, val_t
               } else {
                nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
               }
-              /* ../lib/standard/kernel.nit:234 */
+              /* ../lib/standard/kernel.nit:241 */
               REGB5 = TAG_Bool(UNTAG_Int(REGB4)<=UNTAG_Int(REGB5));
             } else {
-              /* ../lib/standard/collection/array.nit:398 */
+              /* ../lib/standard/collection/array.nit:399 */
               REGB4 = TAG_Bool(0);
               REGB5 = REGB4;
             }
             if (UNTAG_Bool(REGB5)) {
               REGB5 = TAG_Int(1);
-              /* ../lib/standard/kernel.nit:238 */
+              /* ../lib/standard/kernel.nit:245 */
               REGB5 = TAG_Int(UNTAG_Int(REGB2)+UNTAG_Int(REGB5));
-              /* ../lib/standard/collection/array.nit:398 */
+              /* ../lib/standard/collection/array.nit:399 */
               REGB2 = REGB5;
             } else {
               goto label4;
             }
           }
           label4: while(0);
-          /* ../lib/standard/collection/array.nit:399 */
+          /* ../lib/standard/collection/array.nit:400 */
           while(1) {
             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 */
+            /* ../lib/standard/kernel.nit:244 */
             REGB5 = TAG_Bool(UNTAG_Int(REGB3)>UNTAG_Int(REGB2));
-            /* ../lib/standard/collection/array.nit:399 */
+            /* ../lib/standard/collection/array.nit:400 */
             if (UNTAG_Bool(REGB5)) {
-              /* ../lib/standard/collection/array.nit:278 */
+              /* ../lib/standard/collection/array.nit:279 */
               fra.me.REG[2] = fra.me.REG[0];
               REGB5 = REGB3;
-              /* ../lib/standard/collection/array.nit:280 */
+              /* ../lib/standard/collection/array.nit:281 */
               REGB4 = TAG_Int(0);
               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 */
+              /* ../lib/standard/kernel.nit:243 */
               REGB4 = TAG_Bool(UNTAG_Int(REGB5)>=UNTAG_Int(REGB4));
-              /* ../lib/standard/collection/array.nit:280 */
+              /* ../lib/standard/collection/array.nit:281 */
               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, 280);
+               nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 281);
                }
                REGB4 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
                REGB6 = TAG_Bool(VAL_ISA(REGB4, VTCOLOR_standard___kernel___Comparable___OTHER(REGB5), VTID_standard___kernel___Comparable___OTHER(REGB5))) /*cast OTHER*/;
@@ -2410,29 +2412,29 @@ void standard___collection___array___Array___sub_sort(val_t p0, val_t p1, val_t
                } else {
                nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
                }
-               /* ../lib/standard/kernel.nit:235 */
+               /* ../lib/standard/kernel.nit:242 */
                REGB4 = TAG_Bool(UNTAG_Int(REGB5)<UNTAG_Int(REGB4));
               } else {
-               /* ../lib/standard/collection/array.nit:280 */
+               /* ../lib/standard/collection/array.nit:281 */
                REGB6 = TAG_Bool(0);
                REGB4 = REGB6;
               }
               if (UNTAG_Bool(REGB4)) {
               } else {
-               nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
+               nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 281);
               }
-              /* ../lib/standard/collection/array.nit:281 */
+              /* ../lib/standard/collection/array.nit:282 */
               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, 281);
+               nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 282);
               }
-              /* ../lib/standard/collection/array.nit:724 */
+              /* ../lib/standard/collection/array.nit:725 */
               fra.me.REG[2] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB5)];
-              /* ../lib/standard/collection/array.nit:281 */
+              /* ../lib/standard/collection/array.nit:282 */
               goto label5;
               label5: while(0);
-              /* ../lib/standard/collection/array.nit:399 */
+              /* ../lib/standard/collection/array.nit:400 */
               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;
@@ -2443,18 +2445,18 @@ void standard___collection___array___Array___sub_sort(val_t p0, val_t p1, val_t
               } else {
                nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
               }
-              /* ../lib/standard/kernel.nit:236 */
+              /* ../lib/standard/kernel.nit:243 */
               REGB4 = TAG_Bool(UNTAG_Int(REGB5)>=UNTAG_Int(REGB4));
             } else {
-              /* ../lib/standard/collection/array.nit:399 */
+              /* ../lib/standard/collection/array.nit:400 */
               REGB5 = TAG_Bool(0);
               REGB4 = REGB5;
             }
             if (UNTAG_Bool(REGB4)) {
               REGB4 = TAG_Int(1);
-              /* ../lib/standard/kernel.nit:240 */
+              /* ../lib/standard/kernel.nit:247 */
               REGB4 = TAG_Int(UNTAG_Int(REGB3)-UNTAG_Int(REGB4));
-              /* ../lib/standard/collection/array.nit:399 */
+              /* ../lib/standard/collection/array.nit:400 */
               REGB3 = REGB4;
             } else {
               goto label6;
@@ -2466,28 +2468,28 @@ void standard___collection___array___Array___sub_sort(val_t p0, val_t p1, val_t
           } else {
             nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
           }
-          /* ../lib/standard/kernel.nit:237 */
+          /* ../lib/standard/kernel.nit:244 */
           REGB4 = TAG_Bool(UNTAG_Int(REGB3)>UNTAG_Int(REGB2));
-          /* ../lib/standard/collection/array.nit:400 */
+          /* ../lib/standard/collection/array.nit:401 */
           if (UNTAG_Bool(REGB4)) {
-            /* ../lib/standard/collection/array.nit:278 */
+            /* ../lib/standard/collection/array.nit:279 */
             fra.me.REG[2] = fra.me.REG[0];
             REGB4 = REGB2;
-            /* ../lib/standard/collection/array.nit:280 */
+            /* ../lib/standard/collection/array.nit:281 */
             REGB5 = TAG_Int(0);
             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 */
+            /* ../lib/standard/kernel.nit:243 */
             REGB5 = TAG_Bool(UNTAG_Int(REGB4)>=UNTAG_Int(REGB5));
-            /* ../lib/standard/collection/array.nit:280 */
+            /* ../lib/standard/collection/array.nit:281 */
             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, 280);
+               nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 281);
               }
               REGB5 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
               REGB6 = TAG_Bool(VAL_ISA(REGB5, VTCOLOR_standard___kernel___Comparable___OTHER(REGB4), VTID_standard___kernel___Comparable___OTHER(REGB4))) /*cast OTHER*/;
@@ -2495,46 +2497,46 @@ void standard___collection___array___Array___sub_sort(val_t p0, val_t p1, val_t
               } else {
                nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
               }
-              /* ../lib/standard/kernel.nit:235 */
+              /* ../lib/standard/kernel.nit:242 */
               REGB5 = TAG_Bool(UNTAG_Int(REGB4)<UNTAG_Int(REGB5));
             } else {
-              /* ../lib/standard/collection/array.nit:280 */
+              /* ../lib/standard/collection/array.nit:281 */
               REGB6 = TAG_Bool(0);
               REGB5 = REGB6;
             }
             if (UNTAG_Bool(REGB5)) {
             } else {
-              nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
+              nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 281);
             }
-            /* ../lib/standard/collection/array.nit:281 */
+            /* ../lib/standard/collection/array.nit:282 */
             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, 281);
+              nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 282);
             }
-            /* ../lib/standard/collection/array.nit:724 */
+            /* ../lib/standard/collection/array.nit:725 */
             fra.me.REG[2] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB4)];
-            /* ../lib/standard/collection/array.nit:281 */
+            /* ../lib/standard/collection/array.nit:282 */
             goto label7;
             label7: while(0);
-            /* ../lib/standard/collection/array.nit:278 */
+            /* ../lib/standard/collection/array.nit:279 */
             fra.me.REG[3] = fra.me.REG[0];
             REGB4 = REGB3;
-            /* ../lib/standard/collection/array.nit:280 */
+            /* ../lib/standard/collection/array.nit:281 */
             REGB5 = TAG_Int(0);
             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 */
+            /* ../lib/standard/kernel.nit:243 */
             REGB5 = TAG_Bool(UNTAG_Int(REGB4)>=UNTAG_Int(REGB5));
-            /* ../lib/standard/collection/array.nit:280 */
+            /* ../lib/standard/collection/array.nit:281 */
             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, 280);
+               nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 281);
               }
               REGB5 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[3]);
               REGB6 = TAG_Bool(VAL_ISA(REGB5, VTCOLOR_standard___kernel___Comparable___OTHER(REGB4), VTID_standard___kernel___Comparable___OTHER(REGB4))) /*cast OTHER*/;
@@ -2542,60 +2544,60 @@ void standard___collection___array___Array___sub_sort(val_t p0, val_t p1, val_t
               } else {
                nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
               }
-              /* ../lib/standard/kernel.nit:235 */
+              /* ../lib/standard/kernel.nit:242 */
               REGB5 = TAG_Bool(UNTAG_Int(REGB4)<UNTAG_Int(REGB5));
             } else {
-              /* ../lib/standard/collection/array.nit:280 */
+              /* ../lib/standard/collection/array.nit:281 */
               REGB6 = TAG_Bool(0);
               REGB5 = REGB6;
             }
             if (UNTAG_Bool(REGB5)) {
             } else {
-              nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
+              nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 281);
             }
-            /* ../lib/standard/collection/array.nit:281 */
+            /* ../lib/standard/collection/array.nit:282 */
             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, 281);
+              nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 282);
             }
-            /* ../lib/standard/collection/array.nit:724 */
+            /* ../lib/standard/collection/array.nit:725 */
             fra.me.REG[3] = ((Nit_NativeArray)fra.me.REG[3])->val[UNTAG_Int(REGB4)];
-            /* ../lib/standard/collection/array.nit:281 */
+            /* ../lib/standard/collection/array.nit:282 */
             goto label8;
             label8: while(0);
-            /* ../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], REGB2, fra.me.REG[3]);
+            /* ../lib/standard/collection/array.nit:404 */
             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:397 */
+          /* ../lib/standard/collection/array.nit:398 */
           goto label9;
         }
       }
       label9: while(0);
-      /* ../lib/standard/collection/array.nit:406 */
+      /* ../lib/standard/collection/array.nit:407 */
       REGB3 = TAG_Int(1);
-      /* ../lib/standard/kernel.nit:240 */
+      /* ../lib/standard/kernel.nit:247 */
       REGB3 = TAG_Int(UNTAG_Int(REGB2)-UNTAG_Int(REGB3));
-      /* ../lib/standard/collection/array.nit:278 */
+      /* ../lib/standard/collection/array.nit:279 */
       fra.me.REG[2] = fra.me.REG[0];
-      /* ../lib/standard/collection/array.nit:280 */
+      /* ../lib/standard/collection/array.nit:281 */
       REGB4 = TAG_Int(0);
       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 */
+      /* ../lib/standard/kernel.nit:243 */
       REGB4 = TAG_Bool(UNTAG_Int(REGB3)>=UNTAG_Int(REGB4));
-      /* ../lib/standard/collection/array.nit:280 */
+      /* ../lib/standard/collection/array.nit:281 */
       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, 280);
+          nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 281);
         }
         REGB4 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
         REGB5 = TAG_Bool(VAL_ISA(REGB4, VTCOLOR_standard___kernel___Comparable___OTHER(REGB3), VTID_standard___kernel___Comparable___OTHER(REGB3))) /*cast OTHER*/;
@@ -2603,39 +2605,39 @@ void standard___collection___array___Array___sub_sort(val_t p0, val_t p1, val_t
         } else {
           nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
         }
-        /* ../lib/standard/kernel.nit:235 */
+        /* ../lib/standard/kernel.nit:242 */
         REGB4 = TAG_Bool(UNTAG_Int(REGB3)<UNTAG_Int(REGB4));
       } else {
-        /* ../lib/standard/collection/array.nit:280 */
+        /* ../lib/standard/collection/array.nit:281 */
         REGB5 = TAG_Bool(0);
         REGB4 = REGB5;
       }
       if (UNTAG_Bool(REGB4)) {
       } else {
-        nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
+        nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 281);
       }
-      /* ../lib/standard/collection/array.nit:281 */
+      /* ../lib/standard/collection/array.nit:282 */
       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, 281);
+        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 282);
       }
-      /* ../lib/standard/collection/array.nit:724 */
+      /* ../lib/standard/collection/array.nit:725 */
       fra.me.REG[2] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB3)];
-      /* ../lib/standard/collection/array.nit:281 */
+      /* ../lib/standard/collection/array.nit:282 */
       goto label10;
       label10: while(0);
-      /* ../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 */
+      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:408 */
       REGB3 = TAG_Int(1);
-      /* ../lib/standard/kernel.nit:240 */
+      /* ../lib/standard/kernel.nit:247 */
       REGB3 = TAG_Int(UNTAG_Int(REGB2)-UNTAG_Int(REGB3));
-      /* ../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 */
+      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:409 */
       REGB3 = TAG_Int(2);
-      /* ../lib/standard/kernel.nit:240 */
+      /* ../lib/standard/kernel.nit:247 */
       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) {
@@ -2648,37 +2650,37 @@ 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:412 */
+      /* ../lib/standard/collection/array.nit:413 */
       while(1) {
         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 */
+        /* ../lib/standard/kernel.nit:242 */
         REGB2 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
-        /* ../lib/standard/collection/array.nit:412 */
+        /* ../lib/standard/collection/array.nit:413 */
         if (UNTAG_Bool(REGB2)) {
-          /* ../lib/standard/collection/array.nit:413 */
+          /* ../lib/standard/collection/array.nit:414 */
           REGB2 = REGB0;
-          /* ../lib/standard/collection/array.nit:278 */
+          /* ../lib/standard/collection/array.nit:279 */
           fra.me.REG[1] = fra.me.REG[0];
           REGB3 = REGB0;
-          /* ../lib/standard/collection/array.nit:280 */
+          /* ../lib/standard/collection/array.nit:281 */
           REGB4 = TAG_Int(0);
           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 */
+          /* ../lib/standard/kernel.nit:243 */
           REGB4 = TAG_Bool(UNTAG_Int(REGB3)>=UNTAG_Int(REGB4));
-          /* ../lib/standard/collection/array.nit:280 */
+          /* ../lib/standard/collection/array.nit:281 */
           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, 280);
+              nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 281);
             }
             REGB4 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[1]);
             REGB5 = TAG_Bool(VAL_ISA(REGB4, VTCOLOR_standard___kernel___Comparable___OTHER(REGB3), VTID_standard___kernel___Comparable___OTHER(REGB3))) /*cast OTHER*/;
@@ -2686,59 +2688,59 @@ void standard___collection___array___Array___sub_sort(val_t p0, val_t p1, val_t
             } else {
               nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
             }
-            /* ../lib/standard/kernel.nit:235 */
+            /* ../lib/standard/kernel.nit:242 */
             REGB4 = TAG_Bool(UNTAG_Int(REGB3)<UNTAG_Int(REGB4));
           } else {
-            /* ../lib/standard/collection/array.nit:280 */
+            /* ../lib/standard/collection/array.nit:281 */
             REGB5 = TAG_Bool(0);
             REGB4 = REGB5;
           }
           if (UNTAG_Bool(REGB4)) {
           } else {
-            nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
+            nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 281);
           }
-          /* ../lib/standard/collection/array.nit:281 */
+          /* ../lib/standard/collection/array.nit:282 */
           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, 281);
+            nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 282);
           }
-          /* ../lib/standard/collection/array.nit:724 */
+          /* ../lib/standard/collection/array.nit:725 */
           fra.me.REG[1] = ((Nit_NativeArray)fra.me.REG[1])->val[UNTAG_Int(REGB3)];
-          /* ../lib/standard/collection/array.nit:281 */
+          /* ../lib/standard/collection/array.nit:282 */
           goto label15;
           label15: while(0);
-          /* ../lib/standard/collection/array.nit:415 */
-          REGB3 = REGB0;
           /* ../lib/standard/collection/array.nit:416 */
+          REGB3 = REGB0;
+          /* ../lib/standard/collection/array.nit:417 */
           while(1) {
             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 */
+            /* ../lib/standard/kernel.nit:241 */
             REGB4 = TAG_Bool(UNTAG_Int(REGB3)<=UNTAG_Int(REGB1));
-            /* ../lib/standard/collection/array.nit:416 */
+            /* ../lib/standard/collection/array.nit:417 */
             if (UNTAG_Bool(REGB4)) {
-              /* ../lib/standard/collection/array.nit:278 */
+              /* ../lib/standard/collection/array.nit:279 */
               fra.me.REG[2] = fra.me.REG[0];
               REGB4 = REGB3;
-              /* ../lib/standard/collection/array.nit:280 */
+              /* ../lib/standard/collection/array.nit:281 */
               REGB5 = TAG_Int(0);
               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 */
+              /* ../lib/standard/kernel.nit:243 */
               REGB5 = TAG_Bool(UNTAG_Int(REGB4)>=UNTAG_Int(REGB5));
-              /* ../lib/standard/collection/array.nit:280 */
+              /* ../lib/standard/collection/array.nit:281 */
               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, 280);
+               nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 281);
                }
                REGB5 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
                REGB6 = TAG_Bool(VAL_ISA(REGB5, VTCOLOR_standard___kernel___Comparable___OTHER(REGB4), VTID_standard___kernel___Comparable___OTHER(REGB4))) /*cast OTHER*/;
@@ -2746,29 +2748,29 @@ void standard___collection___array___Array___sub_sort(val_t p0, val_t p1, val_t
                } else {
                nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
                }
-               /* ../lib/standard/kernel.nit:235 */
+               /* ../lib/standard/kernel.nit:242 */
                REGB5 = TAG_Bool(UNTAG_Int(REGB4)<UNTAG_Int(REGB5));
               } else {
-               /* ../lib/standard/collection/array.nit:280 */
+               /* ../lib/standard/collection/array.nit:281 */
                REGB6 = TAG_Bool(0);
                REGB5 = REGB6;
               }
               if (UNTAG_Bool(REGB5)) {
               } else {
-               nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
+               nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 281);
               }
-              /* ../lib/standard/collection/array.nit:281 */
+              /* ../lib/standard/collection/array.nit:282 */
               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, 281);
+               nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 282);
               }
-              /* ../lib/standard/collection/array.nit:724 */
+              /* ../lib/standard/collection/array.nit:725 */
               fra.me.REG[2] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB4)];
-              /* ../lib/standard/collection/array.nit:281 */
+              /* ../lib/standard/collection/array.nit:282 */
               goto label16;
               label16: while(0);
-              /* ../lib/standard/collection/array.nit:417 */
+              /* ../lib/standard/collection/array.nit:418 */
               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;
@@ -2779,30 +2781,30 @@ void standard___collection___array___Array___sub_sort(val_t p0, val_t p1, val_t
               } else {
                nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
               }
-              /* ../lib/standard/kernel.nit:237 */
+              /* ../lib/standard/kernel.nit:244 */
               REGB5 = TAG_Bool(UNTAG_Int(REGB4)>UNTAG_Int(REGB5));
-              /* ../lib/standard/collection/array.nit:417 */
+              /* ../lib/standard/collection/array.nit:418 */
               if (UNTAG_Bool(REGB5)) {
-               /* ../lib/standard/collection/array.nit:418 */
+               /* ../lib/standard/collection/array.nit:419 */
                REGB2 = REGB3;
-               /* ../lib/standard/collection/array.nit:278 */
+               /* ../lib/standard/collection/array.nit:279 */
                fra.me.REG[2] = fra.me.REG[0];
                REGB5 = REGB3;
-               /* ../lib/standard/collection/array.nit:280 */
+               /* ../lib/standard/collection/array.nit:281 */
                REGB4 = TAG_Int(0);
                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 */
+               /* ../lib/standard/kernel.nit:243 */
                REGB4 = TAG_Bool(UNTAG_Int(REGB5)>=UNTAG_Int(REGB4));
-               /* ../lib/standard/collection/array.nit:280 */
+               /* ../lib/standard/collection/array.nit:281 */
                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, 280);
+               nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 281);
                }
                REGB4 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
                REGB6 = TAG_Bool(VAL_ISA(REGB4, VTCOLOR_standard___kernel___Comparable___OTHER(REGB5), VTID_standard___kernel___Comparable___OTHER(REGB5))) /*cast OTHER*/;
@@ -2810,72 +2812,72 @@ void standard___collection___array___Array___sub_sort(val_t p0, val_t p1, val_t
                } else {
                nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
                }
-               /* ../lib/standard/kernel.nit:235 */
+               /* ../lib/standard/kernel.nit:242 */
                REGB4 = TAG_Bool(UNTAG_Int(REGB5)<UNTAG_Int(REGB4));
                } else {
-               /* ../lib/standard/collection/array.nit:280 */
+               /* ../lib/standard/collection/array.nit:281 */
                REGB6 = TAG_Bool(0);
                REGB4 = REGB6;
                }
                if (UNTAG_Bool(REGB4)) {
                } else {
-               nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
+               nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 281);
                }
-               /* ../lib/standard/collection/array.nit:281 */
+               /* ../lib/standard/collection/array.nit:282 */
                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, 281);
+               nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 282);
                }
-               /* ../lib/standard/collection/array.nit:724 */
+               /* ../lib/standard/collection/array.nit:725 */
                fra.me.REG[2] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB5)];
-               /* ../lib/standard/collection/array.nit:281 */
+               /* ../lib/standard/collection/array.nit:282 */
                goto label17;
                label17: while(0);
-               /* ../lib/standard/collection/array.nit:419 */
+               /* ../lib/standard/collection/array.nit:420 */
                fra.me.REG[1] = fra.me.REG[2];
               }
-              /* ../lib/standard/collection/array.nit:421 */
+              /* ../lib/standard/collection/array.nit:422 */
               REGB5 = TAG_Int(1);
-              /* ../lib/standard/kernel.nit:238 */
+              /* ../lib/standard/kernel.nit:245 */
               REGB5 = TAG_Int(UNTAG_Int(REGB3)+UNTAG_Int(REGB5));
-              /* ../lib/standard/collection/array.nit:421 */
+              /* ../lib/standard/collection/array.nit:422 */
               REGB3 = REGB5;
             } else {
-              /* ../lib/standard/collection/array.nit:416 */
+              /* ../lib/standard/collection/array.nit:417 */
               goto label18;
             }
           }
           label18: while(0);
-          /* ../lib/standard/collection/array.nit:423 */
+          /* ../lib/standard/collection/array.nit:424 */
           REGB3 = TAG_Bool(IS_EQUAL_OO(REGB2,REGB0));
           if (UNTAG_Bool(REGB3)) {
           } else {
-            /* ../lib/standard/kernel.nit:230 */
+            /* ../lib/standard/kernel.nit:237 */
             REGB5 = TAG_Bool((REGB2)==(REGB0));
-            /* ../lib/standard/collection/array.nit:423 */
+            /* ../lib/standard/collection/array.nit:424 */
             REGB3 = REGB5;
           }
           REGB3 = TAG_Bool(!UNTAG_Bool(REGB3));
           if (UNTAG_Bool(REGB3)) {
-            /* ../lib/standard/collection/array.nit:278 */
+            /* ../lib/standard/collection/array.nit:279 */
             fra.me.REG[2] = fra.me.REG[0];
             REGB3 = REGB0;
-            /* ../lib/standard/collection/array.nit:280 */
+            /* ../lib/standard/collection/array.nit:281 */
             REGB5 = TAG_Int(0);
             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 */
+            /* ../lib/standard/kernel.nit:243 */
             REGB5 = TAG_Bool(UNTAG_Int(REGB3)>=UNTAG_Int(REGB5));
-            /* ../lib/standard/collection/array.nit:280 */
+            /* ../lib/standard/collection/array.nit:281 */
             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, 280);
+               nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 281);
               }
               REGB5 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2]);
               REGB4 = TAG_Bool(VAL_ISA(REGB5, VTCOLOR_standard___kernel___Comparable___OTHER(REGB3), VTID_standard___kernel___Comparable___OTHER(REGB3))) /*cast OTHER*/;
@@ -2883,41 +2885,41 @@ void standard___collection___array___Array___sub_sort(val_t p0, val_t p1, val_t
               } else {
                nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
               }
-              /* ../lib/standard/kernel.nit:235 */
+              /* ../lib/standard/kernel.nit:242 */
               REGB5 = TAG_Bool(UNTAG_Int(REGB3)<UNTAG_Int(REGB5));
             } else {
-              /* ../lib/standard/collection/array.nit:280 */
+              /* ../lib/standard/collection/array.nit:281 */
               REGB4 = TAG_Bool(0);
               REGB5 = REGB4;
             }
             if (UNTAG_Bool(REGB5)) {
             } else {
-              nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
+              nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 281);
             }
-            /* ../lib/standard/collection/array.nit:281 */
+            /* ../lib/standard/collection/array.nit:282 */
             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, 281);
+              nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 282);
             }
-            /* ../lib/standard/collection/array.nit:724 */
+            /* ../lib/standard/collection/array.nit:725 */
             fra.me.REG[2] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB3)];
-            /* ../lib/standard/collection/array.nit:281 */
+            /* ../lib/standard/collection/array.nit:282 */
             goto label19;
             label19: while(0);
-            /* ../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], REGB2, fra.me.REG[2]);
+            /* ../lib/standard/collection/array.nit:426 */
             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:427 */
+          /* ../lib/standard/collection/array.nit:428 */
           REGB2 = TAG_Int(1);
-          /* ../lib/standard/kernel.nit:238 */
+          /* ../lib/standard/kernel.nit:245 */
           REGB2 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB2));
-          /* ../lib/standard/collection/array.nit:427 */
+          /* ../lib/standard/collection/array.nit:428 */
           REGB0 = REGB2;
         } else {
-          /* ../lib/standard/collection/array.nit:412 */
+          /* ../lib/standard/collection/array.nit:413 */
           goto label20;
         }
       }
@@ -2932,10 +2934,10 @@ 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:408 */
+        /* ../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 = 408;
+        fra.me.line = 409;
         fra.me.meth = LOCATE_standard___collection___array___Array___sub_sort;
         fra.me.has_broke = 0;
         fra.me.REG_size = 2;
@@ -2958,10 +2960,10 @@ 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:409 */
+        /* ../lib/standard/collection/array.nit:410 */
         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 = 410;
         fra.me.meth = LOCATE_standard___collection___array___Array___sub_sort;
         fra.me.has_broke = 0;
         fra.me.REG_size = 2;
@@ -2987,7 +2989,7 @@ val_t standard___collection___array___ArrayIterator___item(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 = 437;
+  fra.me.line = 438;
   fra.me.meth = LOCATE_standard___collection___array___ArrayIterator___item;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
@@ -2995,17 +2997,17 @@ val_t standard___collection___array___ArrayIterator___item(val_t p0){
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ../lib/standard/collection/array.nit:437 */
+  /* ../lib/standard/collection/array.nit:438 */
   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, 437);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 438);
   }
   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, 437);
+    nit_abort("Uninitialized attribute %s", "_index", LOCATE_standard___collection___array, 438);
   }
   REGB0 = ATTR_standard___collection___array___ArrayIterator____index(fra.me.REG[0]);
   fra.me.REG[1] = CALL_standard___collection___abstract_collection___SequenceRead_____bra(fra.me.REG[1])(fra.me.REG[1], REGB0);
@@ -3023,24 +3025,24 @@ val_t standard___collection___array___ArrayIterator___is_ok(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 = 441;
+  fra.me.line = 442;
   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:441 */
+  /* ../lib/standard/collection/array.nit:442 */
   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, 441);
+    nit_abort("Uninitialized attribute %s", "_index", LOCATE_standard___collection___array, 442);
   }
   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, 441);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 442);
   }
   fra.me.REG[0] = ATTR_standard___collection___array___ArrayIterator____array(fra.me.REG[0]);
   /* ../lib/standard/collection/array.nit:24 */
@@ -3055,9 +3057,9 @@ val_t standard___collection___array___ArrayIterator___is_ok(val_t p0){
   } else {
     nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
   }
-  /* ../lib/standard/kernel.nit:235 */
+  /* ../lib/standard/kernel.nit:242 */
   REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
-  /* ../lib/standard/collection/array.nit:441 */
+  /* ../lib/standard/collection/array.nit:442 */
   goto label1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
@@ -3071,19 +3073,19 @@ 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 = 443;
+  fra.me.line = 444;
   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:443 */
+  /* ../lib/standard/collection/array.nit:444 */
   REGB0 = ATTR_standard___collection___array___ArrayIterator____index(fra.me.REG[0]);
   REGB1 = TAG_Int(1);
-  /* ../lib/standard/kernel.nit:238 */
+  /* ../lib/standard/kernel.nit:245 */
   REGB1 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB1));
-  /* ../lib/standard/collection/array.nit:443 */
+  /* ../lib/standard/collection/array.nit:444 */
   ATTR_standard___collection___array___ArrayIterator____index(fra.me.REG[0]) = REGB1;
   stack_frame_head = fra.me.prev;
   return;
@@ -3097,7 +3099,7 @@ void standard___collection___array___ArrayIterator___init(val_t p0, val_t p1, in
   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 = 445;
+  fra.me.line = 446;
   fra.me.meth = LOCATE_standard___collection___array___ArrayIterator___init;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
@@ -3106,9 +3108,9 @@ void standard___collection___array___ArrayIterator___init(val_t p0, val_t p1, in
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ../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:448 */
+  ATTR_standard___collection___array___ArrayIterator____array(fra.me.REG[0]) = fra.me.REG[1];
+  /* ../lib/standard/collection/array.nit:449 */
   REGB0 = TAG_Int(0);
   ATTR_standard___collection___array___ArrayIterator____index(fra.me.REG[0]) = REGB0;
   stack_frame_head = fra.me.prev;
@@ -3122,18 +3124,18 @@ val_t standard___collection___array___ArrayIterator___index(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 = 451;
+  fra.me.line = 452;
   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:451 */
+  /* ../lib/standard/collection/array.nit:452 */
   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, 451);
+    nit_abort("Uninitialized attribute %s", "_index", LOCATE_standard___collection___array, 452);
   }
   REGB0 = ATTR_standard___collection___array___ArrayIterator____index(fra.me.REG[0]);
   stack_frame_head = fra.me.prev;
@@ -3146,7 +3148,7 @@ val_t standard___collection___array___ArraySet___has(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 = 464;
+  fra.me.line = 465;
   fra.me.meth = LOCATE_standard___collection___array___ArraySet___has;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
@@ -3155,11 +3157,11 @@ val_t standard___collection___array___ArraySet___has(val_t p0, val_t p1){
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ../lib/standard/collection/array.nit:464 */
+  /* ../lib/standard/collection/array.nit:465 */
   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, 464);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 465);
   }
   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]);
@@ -3175,7 +3177,7 @@ void standard___collection___array___ArraySet___add(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 = 466;
+  fra.me.line = 467;
   fra.me.meth = LOCATE_standard___collection___array___ArraySet___add;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
@@ -3185,11 +3187,11 @@ void standard___collection___array___ArraySet___add(val_t p0, val_t p1){
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ../lib/standard/collection/array.nit:466 */
+  /* ../lib/standard/collection/array.nit:467 */
   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, 466);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 467);
   }
   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]);
@@ -3198,7 +3200,7 @@ 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, 466);
+      nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 467);
     }
     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]);
@@ -3213,18 +3215,18 @@ val_t standard___collection___array___ArraySet___is_empty(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 = 468;
+  fra.me.line = 469;
   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:468 */
+  /* ../lib/standard/collection/array.nit:469 */
   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, 468);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 469);
   }
   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]);
@@ -3240,18 +3242,18 @@ val_t standard___collection___array___ArraySet___length(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 = 470;
+  fra.me.line = 471;
   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:470 */
+  /* ../lib/standard/collection/array.nit:471 */
   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, 470);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 471);
   }
   fra.me.REG[0] = ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0]);
   /* ../lib/standard/collection/array.nit:24 */
@@ -3261,7 +3263,7 @@ val_t standard___collection___array___ArraySet___length(val_t p0){
     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:470 */
+  /* ../lib/standard/collection/array.nit:471 */
   goto label1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
@@ -3276,7 +3278,7 @@ val_t standard___collection___array___ArraySet___first(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 = 472;
+  fra.me.line = 473;
   fra.me.meth = LOCATE_standard___collection___array___ArraySet___first;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
@@ -3284,11 +3286,11 @@ val_t standard___collection___array___ArraySet___first(val_t p0){
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ../lib/standard/collection/array.nit:474 */
+  /* ../lib/standard/collection/array.nit:475 */
   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, 474);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 475);
   }
   fra.me.REG[1] = ATTR_standard___collection___array___ArraySet____array(fra.me.REG[0]);
   /* ../lib/standard/collection/array.nit:24 */
@@ -3298,25 +3300,25 @@ val_t standard___collection___array___ArraySet___first(val_t p0){
     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:474 */
+  /* ../lib/standard/collection/array.nit:475 */
   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:237 */
+  /* ../lib/standard/kernel.nit:244 */
   REGB1 = TAG_Bool(UNTAG_Int(REGB0)>UNTAG_Int(REGB1));
-  /* ../lib/standard/collection/array.nit:474 */
+  /* ../lib/standard/collection/array.nit:475 */
   if (UNTAG_Bool(REGB1)) {
   } else {
-    nit_abort("Assert failed", NULL, LOCATE_standard___collection___array, 474);
+    nit_abort("Assert failed", NULL, LOCATE_standard___collection___array, 475);
   }
-  /* ../lib/standard/collection/array.nit:475 */
+  /* ../lib/standard/collection/array.nit:476 */
   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, 475);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 476);
   }
   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]);
@@ -3334,7 +3336,7 @@ void standard___collection___array___ArraySet___remove(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 = 478;
+  fra.me.line = 479;
   fra.me.meth = LOCATE_standard___collection___array___ArraySet___remove;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
@@ -3344,24 +3346,24 @@ void standard___collection___array___ArraySet___remove(val_t p0, val_t p1){
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ../lib/standard/collection/array.nit:480 */
+  /* ../lib/standard/collection/array.nit:481 */
   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, 480);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 481);
   }
   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:481 */
+  /* ../lib/standard/collection/array.nit:482 */
   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 */
+  /* ../lib/standard/kernel.nit:243 */
   REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-  /* ../lib/standard/collection/array.nit:481 */
+  /* ../lib/standard/collection/array.nit:482 */
   if (UNTAG_Bool(REGB1)) {
     CALL_standard___collection___array___ArraySet___remove_at(fra.me.REG[0])(fra.me.REG[0], REGB0);
   }
@@ -3374,7 +3376,7 @@ void standard___collection___array___ArraySet___remove_all(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 = 484;
+  fra.me.line = 485;
   fra.me.meth = LOCATE_standard___collection___array___ArraySet___remove_all;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
@@ -3383,7 +3385,7 @@ void standard___collection___array___ArraySet___remove_all(val_t p0, val_t p1){
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ../lib/standard/collection/array.nit:484 */
+  /* ../lib/standard/collection/array.nit:485 */
   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;
@@ -3395,18 +3397,18 @@ void standard___collection___array___ArraySet___clear(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 = 486;
+  fra.me.line = 487;
   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:486 */
+  /* ../lib/standard/collection/array.nit:487 */
   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, 486);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 487);
   }
   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]);
@@ -3420,18 +3422,18 @@ val_t standard___collection___array___ArraySet___iterator(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 = 488;
+  fra.me.line = 489;
   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:488 */
+  /* ../lib/standard/collection/array.nit:489 */
   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, 488);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 489);
   }
   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]);
@@ -3449,7 +3451,7 @@ 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 = 490;
+  fra.me.line = 491;
   fra.me.meth = LOCATE_standard___collection___array___ArraySet___enlarge;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
@@ -3457,11 +3459,11 @@ void standard___collection___array___ArraySet___enlarge(val_t p0, val_t p1){
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
   REGB0 = p1;
-  /* ../lib/standard/collection/array.nit:491 */
+  /* ../lib/standard/collection/array.nit:492 */
   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, 491);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 492);
   }
   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);
@@ -3476,7 +3478,7 @@ 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 = 493;
+  fra.me.line = 494;
   fra.me.meth = LOCATE_standard___collection___array___ArraySet___remove_at;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
@@ -3486,26 +3488,26 @@ void standard___collection___array___ArraySet___remove_at(val_t p0, val_t p1){
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   REGB0 = p1;
-  /* ../lib/standard/collection/array.nit:495 */
+  /* ../lib/standard/collection/array.nit:496 */
   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, 495);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 496);
   }
   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, 495);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 496);
   }
   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___Sequence_____braeq(fra.me.REG[1])(fra.me.REG[1], REGB0, fra.me.REG[2]);
-  /* ../lib/standard/collection/array.nit:496 */
+  /* ../lib/standard/collection/array.nit:497 */
   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, 496);
+    nit_abort("Uninitialized attribute %s", "_array", LOCATE_standard___collection___array, 497);
   }
   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]);
@@ -3520,7 +3522,7 @@ void standard___collection___array___ArraySet___init(val_t p0, int* init_table){
   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 = 499;
+  fra.me.line = 500;
   fra.me.meth = LOCATE_standard___collection___array___ArraySet___init;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
@@ -3528,7 +3530,7 @@ void standard___collection___array___ArraySet___init(val_t p0, int* init_table){
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ../lib/standard/collection/array.nit:500 */
+  /* ../lib/standard/collection/array.nit:501 */
   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;
@@ -3544,7 +3546,7 @@ void standard___collection___array___ArraySet___with_capacity(val_t p0, val_t p1
   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 = 502;
+  fra.me.line = 503;
   fra.me.meth = LOCATE_standard___collection___array___ArraySet___with_capacity;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
@@ -3553,7 +3555,7 @@ void standard___collection___array___ArraySet___with_capacity(val_t p0, val_t p1
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   REGB0 = p1;
-  /* ../lib/standard/collection/array.nit:503 */
+  /* ../lib/standard/collection/array.nit:504 */
   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;
@@ -3567,18 +3569,18 @@ val_t standard___collection___array___ArraySetIterator___is_ok(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 = 510;
+  fra.me.line = 511;
   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:510 */
+  /* ../lib/standard/collection/array.nit:511 */
   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, 510);
+    nit_abort("Uninitialized attribute %s", "_iter", LOCATE_standard___collection___array, 511);
   }
   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]);
@@ -3594,18 +3596,18 @@ void standard___collection___array___ArraySetIterator___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 = 512;
+  fra.me.line = 513;
   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:512 */
+  /* ../lib/standard/collection/array.nit:513 */
   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, 512);
+    nit_abort("Uninitialized attribute %s", "_iter", LOCATE_standard___collection___array, 513);
   }
   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]);
@@ -3619,18 +3621,18 @@ val_t standard___collection___array___ArraySetIterator___item(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 = 514;
+  fra.me.line = 515;
   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:514 */
+  /* ../lib/standard/collection/array.nit:515 */
   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, 514);
+    nit_abort("Uninitialized attribute %s", "_iter", LOCATE_standard___collection___array, 515);
   }
   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]);
@@ -3647,7 +3649,7 @@ void standard___collection___array___ArraySetIterator___init(val_t p0, val_t p1,
   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 = 516;
+  fra.me.line = 517;
   fra.me.meth = LOCATE_standard___collection___array___ArraySetIterator___init;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
@@ -3656,7 +3658,7 @@ void standard___collection___array___ArraySetIterator___init(val_t p0, val_t p1,
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ../lib/standard/collection/array.nit:516 */
+  /* ../lib/standard/collection/array.nit:517 */
   ATTR_standard___collection___array___ArraySetIterator____iter(fra.me.REG[0]) = fra.me.REG[1];
   stack_frame_head = fra.me.prev;
   init_table[itpos10] = 1;
@@ -3671,7 +3673,7 @@ 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 = 526;
+  fra.me.line = 527;
   fra.me.meth = LOCATE_standard___collection___array___ArrayMap_____bra;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
@@ -3680,41 +3682,41 @@ val_t standard___collection___array___ArrayMap_____bra(val_t p0, val_t p1){
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ../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:530 */
+  REGB0 = CALL_standard___collection___array___ArrayMap___index(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+  /* ../lib/standard/collection/array.nit:531 */
   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 */
+  /* ../lib/standard/kernel.nit:243 */
   REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-  /* ../lib/standard/collection/array.nit:530 */
+  /* ../lib/standard/collection/array.nit:531 */
   if (UNTAG_Bool(REGB1)) {
-    /* ../lib/standard/collection/array.nit:531 */
+    /* ../lib/standard/collection/array.nit:532 */
     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, 531);
+      nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 532);
     }
     fra.me.REG[0] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
-    /* ../lib/standard/collection/array.nit:280 */
+    /* ../lib/standard/collection/array.nit:281 */
     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 */
+    /* ../lib/standard/kernel.nit:243 */
     REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-    /* ../lib/standard/collection/array.nit:280 */
+    /* ../lib/standard/collection/array.nit:281 */
     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, 280);
+        nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 281);
       }
       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*/;
@@ -3722,38 +3724,38 @@ val_t standard___collection___array___ArrayMap_____bra(val_t p0, val_t p1){
       } else {
         nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
       }
-      /* ../lib/standard/kernel.nit:235 */
+      /* ../lib/standard/kernel.nit:242 */
       REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
     } else {
-      /* ../lib/standard/collection/array.nit:280 */
+      /* ../lib/standard/collection/array.nit:281 */
       REGB2 = TAG_Bool(0);
       REGB1 = REGB2;
     }
     if (UNTAG_Bool(REGB1)) {
     } else {
-      nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
+      nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 281);
     }
-    /* ../lib/standard/collection/array.nit:281 */
+    /* ../lib/standard/collection/array.nit:282 */
     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);
+      nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 282);
     }
-    /* ../lib/standard/collection/array.nit:724 */
+    /* ../lib/standard/collection/array.nit:725 */
     fra.me.REG[0] = ((Nit_NativeArray)fra.me.REG[0])->val[UNTAG_Int(REGB0)];
-    /* ../lib/standard/collection/array.nit:281 */
+    /* ../lib/standard/collection/array.nit:282 */
     goto label1;
     label1: while(0);
-    /* ../lib/standard/collection/array.nit:531 */
+    /* ../lib/standard/collection/array.nit:532 */
     REGB0 = TAG_Bool(fra.me.REG[0]==NIT_NULL);
     if (UNTAG_Bool(REGB0)) {
-      nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 531);
+      nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 532);
     }
     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:533 */
-    nit_abort("Aborted", NULL, LOCATE_standard___collection___array, 533);
+    /* ../lib/standard/collection/array.nit:534 */
+    nit_abort("Aborted", NULL, LOCATE_standard___collection___array, 534);
   }
   label2: while(0);
   stack_frame_head = fra.me.prev;
@@ -3768,7 +3770,7 @@ 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 = 537;
+  fra.me.line = 538;
   fra.me.meth = LOCATE_standard___collection___array___ArrayMap_____braeq;
   fra.me.has_broke = 0;
   fra.me.REG_size = 4;
@@ -3780,41 +3782,41 @@ 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: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:541 */
+  REGB0 = CALL_standard___collection___array___ArrayMap___index(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+  /* ../lib/standard/collection/array.nit:542 */
   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 */
+  /* ../lib/standard/kernel.nit:243 */
   REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-  /* ../lib/standard/collection/array.nit:541 */
+  /* ../lib/standard/collection/array.nit:542 */
   if (UNTAG_Bool(REGB1)) {
-    /* ../lib/standard/collection/array.nit:542 */
+    /* ../lib/standard/collection/array.nit:543 */
     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, 542);
+      nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 543);
     }
     fra.me.REG[3] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
-    /* ../lib/standard/collection/array.nit:280 */
+    /* ../lib/standard/collection/array.nit:281 */
     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 */
+    /* ../lib/standard/kernel.nit:243 */
     REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-    /* ../lib/standard/collection/array.nit:280 */
+    /* ../lib/standard/collection/array.nit:281 */
     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, 280);
+        nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 281);
       }
       REGB1 = ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[3]);
       REGB2 = TAG_Bool(VAL_ISA(REGB1, VTCOLOR_standard___kernel___Comparable___OTHER(REGB0), VTID_standard___kernel___Comparable___OTHER(REGB0))) /*cast OTHER*/;
@@ -3822,40 +3824,40 @@ void standard___collection___array___ArrayMap_____braeq(val_t p0, val_t p1, val_
       } else {
         nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
       }
-      /* ../lib/standard/kernel.nit:235 */
+      /* ../lib/standard/kernel.nit:242 */
       REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
     } else {
-      /* ../lib/standard/collection/array.nit:280 */
+      /* ../lib/standard/collection/array.nit:281 */
       REGB2 = TAG_Bool(0);
       REGB1 = REGB2;
     }
     if (UNTAG_Bool(REGB1)) {
     } else {
-      nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
+      nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 281);
     }
-    /* ../lib/standard/collection/array.nit:281 */
+    /* ../lib/standard/collection/array.nit:282 */
     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, 281);
+      nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 282);
     }
-    /* ../lib/standard/collection/array.nit:724 */
+    /* ../lib/standard/collection/array.nit:725 */
     fra.me.REG[3] = ((Nit_NativeArray)fra.me.REG[3])->val[UNTAG_Int(REGB0)];
-    /* ../lib/standard/collection/array.nit:281 */
+    /* ../lib/standard/collection/array.nit:282 */
     goto label1;
     label1: while(0);
-    /* ../lib/standard/collection/array.nit:542 */
+    /* ../lib/standard/collection/array.nit:543 */
     REGB0 = TAG_Bool(fra.me.REG[3]==NIT_NULL);
     if (UNTAG_Bool(REGB0)) {
-      nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 542);
+      nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 543);
     }
     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:544 */
+    /* ../lib/standard/collection/array.nit:545 */
     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, 544);
+      nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 545);
     }
     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]);
@@ -3871,18 +3873,18 @@ val_t standard___collection___array___ArrayMap___keys(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 = 548;
+  fra.me.line = 549;
   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 */
+  /* ../lib/standard/collection/array.nit:549 */
   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);
+    nit_abort("Uninitialized attribute %s", "@keys", LOCATE_standard___collection___array, 549);
   }
   fra.me.REG[0] = ATTR_standard___collection___array___ArrayMap_____atkeys(fra.me.REG[0]);
   stack_frame_head = fra.me.prev;
@@ -3894,7 +3896,7 @@ void standard___collection___array___ArrayMap___keys__eq(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 = 548;
+  fra.me.line = 549;
   fra.me.meth = LOCATE_standard___collection___array___ArrayMap___keys__eq;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
@@ -3903,7 +3905,7 @@ void standard___collection___array___ArrayMap___keys__eq(val_t p0, val_t p1){
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ../lib/standard/collection/array.nit:548 */
+  /* ../lib/standard/collection/array.nit:549 */
   ATTR_standard___collection___array___ArrayMap_____atkeys(fra.me.REG[0]) = fra.me.REG[1];
   stack_frame_head = fra.me.prev;
   return;
@@ -3915,18 +3917,18 @@ val_t standard___collection___array___ArrayMap___values(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 = 549;
+  fra.me.line = 550;
   fra.me.meth = LOCATE_standard___collection___array___ArrayMap___values;
   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:549 */
+  /* ../lib/standard/collection/array.nit:550 */
   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", "@values", LOCATE_standard___collection___array, 549);
+    nit_abort("Uninitialized attribute %s", "@values", LOCATE_standard___collection___array, 550);
   }
   fra.me.REG[0] = ATTR_standard___collection___array___ArrayMap_____atvalues(fra.me.REG[0]);
   stack_frame_head = fra.me.prev;
@@ -3938,7 +3940,7 @@ void standard___collection___array___ArrayMap___values__eq(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 = 549;
+  fra.me.line = 550;
   fra.me.meth = LOCATE_standard___collection___array___ArrayMap___values__eq;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
@@ -3947,7 +3949,7 @@ void standard___collection___array___ArrayMap___values__eq(val_t p0, val_t p1){
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ../lib/standard/collection/array.nit:549 */
+  /* ../lib/standard/collection/array.nit:550 */
   ATTR_standard___collection___array___ArrayMap_____atvalues(fra.me.REG[0]) = fra.me.REG[1];
   stack_frame_head = fra.me.prev;
   return;
@@ -3959,18 +3961,18 @@ val_t standard___collection___array___ArrayMap___length(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 = 551;
+  fra.me.line = 552;
   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:552 */
+  /* ../lib/standard/collection/array.nit:553 */
   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, 552);
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 553);
   }
   fra.me.REG[0] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
   /* ../lib/standard/collection/array.nit:24 */
@@ -3980,7 +3982,7 @@ val_t standard___collection___array___ArrayMap___length(val_t p0){
     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:552 */
+  /* ../lib/standard/collection/array.nit:553 */
   goto label1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
@@ -3993,18 +3995,18 @@ val_t standard___collection___array___ArrayMap___iterator(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 = 554;
+  fra.me.line = 555;
   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:554 */
+  /* ../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, 554);
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 555);
   }
   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]);
@@ -4021,18 +4023,18 @@ val_t standard___collection___array___ArrayMap___is_empty(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 = 556;
+  fra.me.line = 557;
   fra.me.meth = LOCATE_standard___collection___array___ArrayMap___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:556 */
+  /* ../lib/standard/collection/array.nit:557 */
   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, 556);
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 557);
   }
   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]);
@@ -4048,18 +4050,18 @@ void standard___collection___array___ArrayMap___clear(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 = 558;
+  fra.me.line = 559;
   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:558 */
+  /* ../lib/standard/collection/array.nit:559 */
   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, 558);
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 559);
   }
   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]);
@@ -4074,7 +4076,7 @@ void standard___collection___array___ArrayMap___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 = 560;
+  fra.me.line = 561;
   fra.me.meth = LOCATE_standard___collection___array___ArrayMap___enlarge;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
@@ -4082,11 +4084,11 @@ void standard___collection___array___ArrayMap___enlarge(val_t p0, val_t p1){
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
   REGB0 = p1;
-  /* ../lib/standard/collection/array.nit:561 */
+  /* ../lib/standard/collection/array.nit:562 */
   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, 561);
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 562);
   }
   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);
@@ -4102,7 +4104,7 @@ val_t standard___collection___array___ArrayMap___couple_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 = 563;
+  fra.me.line = 564;
   fra.me.meth = LOCATE_standard___collection___array___ArrayMap___couple_at;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
@@ -4111,41 +4113,41 @@ val_t standard___collection___array___ArrayMap___couple_at(val_t p0, val_t p1){
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ../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 */
+  REGB0 = CALL_standard___collection___array___ArrayMap___index(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+  /* ../lib/standard/collection/array.nit:567 */
   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 */
+  /* ../lib/standard/kernel.nit:243 */
   REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-  /* ../lib/standard/collection/array.nit:566 */
+  /* ../lib/standard/collection/array.nit:567 */
   if (UNTAG_Bool(REGB1)) {
-    /* ../lib/standard/collection/array.nit:567 */
+    /* ../lib/standard/collection/array.nit:568 */
     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);
+      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]);
-    /* ../lib/standard/collection/array.nit:280 */
+    /* ../lib/standard/collection/array.nit:281 */
     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 */
+    /* ../lib/standard/kernel.nit:243 */
     REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-    /* ../lib/standard/collection/array.nit:280 */
+    /* ../lib/standard/collection/array.nit:281 */
     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, 280);
+        nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 281);
       }
       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*/;
@@ -4153,32 +4155,32 @@ val_t standard___collection___array___ArrayMap___couple_at(val_t p0, val_t p1){
       } else {
         nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
       }
-      /* ../lib/standard/kernel.nit:235 */
+      /* ../lib/standard/kernel.nit:242 */
       REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
     } else {
-      /* ../lib/standard/collection/array.nit:280 */
+      /* ../lib/standard/collection/array.nit:281 */
       REGB2 = TAG_Bool(0);
       REGB1 = REGB2;
     }
     if (UNTAG_Bool(REGB1)) {
     } else {
-      nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
+      nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 281);
     }
-    /* ../lib/standard/collection/array.nit:281 */
+    /* ../lib/standard/collection/array.nit:282 */
     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);
+      nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 282);
     }
-    /* ../lib/standard/collection/array.nit:724 */
+    /* ../lib/standard/collection/array.nit:725 */
     fra.me.REG[0] = ((Nit_NativeArray)fra.me.REG[0])->val[UNTAG_Int(REGB0)];
-    /* ../lib/standard/collection/array.nit:281 */
+    /* ../lib/standard/collection/array.nit:282 */
     goto label1;
     label1: while(0);
-    /* ../lib/standard/collection/array.nit:567 */
+    /* ../lib/standard/collection/array.nit:568 */
     goto label2;
   } else {
-    /* ../lib/standard/collection/array.nit:569 */
+    /* ../lib/standard/collection/array.nit:570 */
     fra.me.REG[0] = NIT_NULL;
     goto label2;
   }
@@ -4194,7 +4196,7 @@ void standard___collection___array___ArrayMap___remove_at_index(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 = 576;
+  fra.me.line = 577;
   fra.me.meth = LOCATE_standard___collection___array___ArrayMap___remove_at_index;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
@@ -4204,26 +4206,26 @@ void standard___collection___array___ArrayMap___remove_at_index(val_t p0, val_t
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   REGB0 = p1;
-  /* ../lib/standard/collection/array.nit:579 */
+  /* ../lib/standard/collection/array.nit:580 */
   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);
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 580);
   }
   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);
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 580);
   }
   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 */
+  /* ../lib/standard/collection/array.nit:581 */
   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);
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 581);
   }
   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]);
@@ -4241,7 +4243,7 @@ val_t standard___collection___array___ArrayMap___index(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 = 586;
+  fra.me.line = 587;
   fra.me.meth = LOCATE_standard___collection___array___ArrayMap___index;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
@@ -4251,18 +4253,18 @@ val_t standard___collection___array___ArrayMap___index(val_t p0, val_t p1){
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ../lib/standard/collection/array.nit:590 */
+  /* ../lib/standard/collection/array.nit:591 */
   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", "_last_index", LOCATE_standard___collection___array, 590);
+    nit_abort("Uninitialized attribute %s", "_last_index", LOCATE_standard___collection___array, 591);
   }
   REGB0 = ATTR_standard___collection___array___ArrayMap____last_index(fra.me.REG[0]);
-  /* ../lib/standard/collection/array.nit:591 */
+  /* ../lib/standard/collection/array.nit:592 */
   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);
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 592);
   }
   fra.me.REG[2] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
   /* ../lib/standard/collection/array.nit:24 */
@@ -4277,33 +4279,33 @@ val_t standard___collection___array___ArrayMap___index(val_t p0, val_t p1){
   } else {
     nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
   }
-  /* ../lib/standard/kernel.nit:235 */
+  /* ../lib/standard/kernel.nit:242 */
   REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
-  /* ../lib/standard/collection/array.nit:591 */
+  /* ../lib/standard/collection/array.nit:592 */
   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);
+      nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 592);
     }
     fra.me.REG[2] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
-    /* ../lib/standard/collection/array.nit:278 */
+    /* ../lib/standard/collection/array.nit:279 */
     REGB1 = REGB0;
-    /* ../lib/standard/collection/array.nit:280 */
+    /* ../lib/standard/collection/array.nit:281 */
     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 */
+    /* ../lib/standard/kernel.nit:243 */
     REGB2 = TAG_Bool(UNTAG_Int(REGB1)>=UNTAG_Int(REGB2));
-    /* ../lib/standard/collection/array.nit:280 */
+    /* ../lib/standard/collection/array.nit:281 */
     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);
+        nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 281);
       }
       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*/;
@@ -4311,32 +4313,32 @@ val_t standard___collection___array___ArrayMap___index(val_t p0, val_t p1){
       } else {
         nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
       }
-      /* ../lib/standard/kernel.nit:235 */
+      /* ../lib/standard/kernel.nit:242 */
       REGB2 = TAG_Bool(UNTAG_Int(REGB1)<UNTAG_Int(REGB2));
     } else {
-      /* ../lib/standard/collection/array.nit:280 */
+      /* ../lib/standard/collection/array.nit:281 */
       REGB3 = TAG_Bool(0);
       REGB2 = REGB3;
     }
     if (UNTAG_Bool(REGB2)) {
     } else {
-      nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
+      nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 281);
     }
-    /* ../lib/standard/collection/array.nit:281 */
+    /* ../lib/standard/collection/array.nit:282 */
     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);
+      nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 282);
     }
-    /* ../lib/standard/collection/array.nit:724 */
+    /* ../lib/standard/collection/array.nit:725 */
     fra.me.REG[2] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB1)];
-    /* ../lib/standard/collection/array.nit:281 */
+    /* ../lib/standard/collection/array.nit:282 */
     goto label1;
     label1: while(0);
-    /* ../lib/standard/collection/array.nit:591 */
+    /* ../lib/standard/collection/array.nit:592 */
     REGB1 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
     if (UNTAG_Bool(REGB1)) {
-      nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 591);
+      nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 592);
     }
     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]));
@@ -4358,14 +4360,14 @@ val_t standard___collection___array___ArrayMap___index(val_t p0, val_t p1){
   if (UNTAG_Bool(REGB1)) {
     goto label2;
   }
-  /* ../lib/standard/collection/array.nit:593 */
-  REGB1 = TAG_Int(0);
   /* ../lib/standard/collection/array.nit:594 */
+  REGB1 = TAG_Int(0);
+  /* ../lib/standard/collection/array.nit:595 */
   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);
+      nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 595);
     }
     fra.me.REG[2] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
     /* ../lib/standard/collection/array.nit:24 */
@@ -4380,34 +4382,34 @@ val_t standard___collection___array___ArrayMap___index(val_t p0, val_t p1){
     } else {
       nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
     }
-    /* ../lib/standard/kernel.nit:235 */
+    /* ../lib/standard/kernel.nit:242 */
     REGB2 = TAG_Bool(UNTAG_Int(REGB1)<UNTAG_Int(REGB2));
-    /* ../lib/standard/collection/array.nit:594 */
+    /* ../lib/standard/collection/array.nit:595 */
     if (UNTAG_Bool(REGB2)) {
-      /* ../lib/standard/collection/array.nit:595 */
+      /* ../lib/standard/collection/array.nit:596 */
       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);
+        nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 596);
       }
       fra.me.REG[2] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
-      /* ../lib/standard/collection/array.nit:278 */
+      /* ../lib/standard/collection/array.nit:279 */
       REGB2 = REGB1;
-      /* ../lib/standard/collection/array.nit:280 */
+      /* ../lib/standard/collection/array.nit:281 */
       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 {
         nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
       }
-      /* ../lib/standard/kernel.nit:236 */
+      /* ../lib/standard/kernel.nit:243 */
       REGB3 = TAG_Bool(UNTAG_Int(REGB2)>=UNTAG_Int(REGB3));
-      /* ../lib/standard/collection/array.nit:280 */
+      /* ../lib/standard/collection/array.nit:281 */
       if (UNTAG_Bool(REGB3)) {
         REGB3 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[2])!=NIT_NULL);
         if (UNTAG_Bool(REGB3)) {
         } else {
-          nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 280);
+          nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 281);
         }
         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*/;
@@ -4415,32 +4417,32 @@ val_t standard___collection___array___ArrayMap___index(val_t p0, val_t p1){
         } else {
           nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
         }
-        /* ../lib/standard/kernel.nit:235 */
+        /* ../lib/standard/kernel.nit:242 */
         REGB3 = TAG_Bool(UNTAG_Int(REGB2)<UNTAG_Int(REGB3));
       } else {
-        /* ../lib/standard/collection/array.nit:280 */
+        /* ../lib/standard/collection/array.nit:281 */
         REGB4 = TAG_Bool(0);
         REGB3 = REGB4;
       }
       if (UNTAG_Bool(REGB3)) {
       } else {
-        nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
+        nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 281);
       }
-      /* ../lib/standard/collection/array.nit:281 */
+      /* ../lib/standard/collection/array.nit:282 */
       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);
+        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 282);
       }
-      /* ../lib/standard/collection/array.nit:724 */
+      /* ../lib/standard/collection/array.nit:725 */
       fra.me.REG[2] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB2)];
-      /* ../lib/standard/collection/array.nit:281 */
+      /* ../lib/standard/collection/array.nit:282 */
       goto label3;
       label3: while(0);
-      /* ../lib/standard/collection/array.nit:595 */
+      /* ../lib/standard/collection/array.nit:596 */
       REGB2 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
       if (UNTAG_Bool(REGB2)) {
-        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 595);
+        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 596);
       }
       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]));
@@ -4456,29 +4458,29 @@ val_t standard___collection___array___ArrayMap___index(val_t p0, val_t p1){
         }
       }
       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 */
+        ATTR_standard___collection___array___ArrayMap____last_index(fra.me.REG[0]) = REGB1;
+        /* ../lib/standard/collection/array.nit:598 */
         REGB0 = REGB1;
         goto label2;
       }
-      /* ../lib/standard/collection/array.nit:599 */
+      /* ../lib/standard/collection/array.nit:600 */
       REGB2 = TAG_Int(1);
-      /* ../lib/standard/kernel.nit:238 */
+      /* ../lib/standard/kernel.nit:245 */
       REGB2 = TAG_Int(UNTAG_Int(REGB1)+UNTAG_Int(REGB2));
-      /* ../lib/standard/collection/array.nit:599 */
+      /* ../lib/standard/collection/array.nit:600 */
       REGB1 = REGB2;
     } else {
-      /* ../lib/standard/collection/array.nit:594 */
+      /* ../lib/standard/collection/array.nit:595 */
       goto label4;
     }
   }
   label4: while(0);
-  /* ../lib/standard/collection/array.nit:601 */
+  /* ../lib/standard/collection/array.nit:602 */
   REGB1 = TAG_Int(1);
-  /* ../lib/standard/kernel.nit:239 */
+  /* ../lib/standard/kernel.nit:246 */
   REGB1 = TAG_Int(-UNTAG_Int(REGB1));
-  /* ../lib/standard/collection/array.nit:601 */
+  /* ../lib/standard/collection/array.nit:602 */
   REGB0 = REGB1;
   goto label2;
   label2: while(0);
@@ -4493,7 +4495,7 @@ void standard___collection___array___ArrayMap___init(val_t p0, int* init_table){
   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.line = 605;
   fra.me.meth = LOCATE_standard___collection___array___ArrayMap___init;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
@@ -4501,7 +4503,7 @@ void standard___collection___array___ArrayMap___init(val_t p0, int* init_table){
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ../lib/standard/collection/array.nit:607 */
+  /* ../lib/standard/collection/array.nit:608 */
   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;
@@ -4515,18 +4517,18 @@ val_t standard___collection___array___ArrayMapKeys___map(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 = 613;
+  fra.me.line = 614;
   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 */
+  /* ../lib/standard/collection/array.nit:614 */
   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);
+    nit_abort("Uninitialized attribute %s", "@map", LOCATE_standard___collection___array, 614);
   }
   fra.me.REG[0] = ATTR_standard___collection___array___ArrayMapKeys_____atmap(fra.me.REG[0]);
   stack_frame_head = fra.me.prev;
@@ -4538,7 +4540,7 @@ void standard___collection___array___ArrayMapKeys___map__eq(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 = 613;
+  fra.me.line = 614;
   fra.me.meth = LOCATE_standard___collection___array___ArrayMapKeys___map__eq;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
@@ -4547,7 +4549,7 @@ void standard___collection___array___ArrayMapKeys___map__eq(val_t p0, val_t p1){
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ../lib/standard/collection/array.nit:613 */
+  /* ../lib/standard/collection/array.nit:614 */
   ATTR_standard___collection___array___ArrayMapKeys_____atmap(fra.me.REG[0]) = fra.me.REG[1];
   stack_frame_head = fra.me.prev;
   return;
@@ -4560,7 +4562,7 @@ val_t standard___collection___array___ArrayMapKeys___count(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 = 615;
+  fra.me.line = 616;
   fra.me.meth = LOCATE_standard___collection___array___ArrayMapKeys___count;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
@@ -4569,7 +4571,7 @@ val_t standard___collection___array___ArrayMapKeys___count(val_t p0, val_t p1){
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ../lib/standard/collection/array.nit:615 */
+  /* ../lib/standard/collection/array.nit:616 */
   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);
@@ -4590,25 +4592,25 @@ val_t standard___collection___array___ArrayMapKeys___first(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 = 616;
+  fra.me.line = 617;
   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 */
+  /* ../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 = 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);
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 617);
   }
   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);
+    nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 617);
   }
   fra.me.REG[0] = CALL_standard___collection___abstract_collection___Couple___first(fra.me.REG[0])(fra.me.REG[0]);
   goto label1;
@@ -4625,7 +4627,7 @@ val_t standard___collection___array___ArrayMapKeys___has(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 = 617;
+  fra.me.line = 618;
   fra.me.meth = LOCATE_standard___collection___array___ArrayMapKeys___has;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
@@ -4634,7 +4636,7 @@ val_t standard___collection___array___ArrayMapKeys___has(val_t p0, val_t p1){
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ../lib/standard/collection/array.nit:617 */
+  /* ../lib/standard/collection/array.nit:618 */
   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);
@@ -4643,9 +4645,9 @@ val_t standard___collection___array___ArrayMapKeys___has(val_t p0, val_t p1){
   } else {
     nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
   }
-  /* ../lib/standard/kernel.nit:236 */
+  /* ../lib/standard/kernel.nit:243 */
   REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-  /* ../lib/standard/collection/array.nit:617 */
+  /* ../lib/standard/collection/array.nit:618 */
   goto label1;
   label1: while(0);
   stack_frame_head = fra.me.prev;
@@ -4660,7 +4662,7 @@ val_t standard___collection___array___ArrayMapKeys___has_only(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 = 618;
+  fra.me.line = 619;
   fra.me.meth = LOCATE_standard___collection___array___ArrayMapKeys___has_only;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
@@ -4669,7 +4671,7 @@ val_t standard___collection___array___ArrayMapKeys___has_only(val_t p0, val_t p1
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ../lib/standard/collection/array.nit:618 */
+  /* ../lib/standard/collection/array.nit:619 */
   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]);
@@ -4677,9 +4679,9 @@ val_t standard___collection___array___ArrayMapKeys___has_only(val_t p0, val_t p1
     REGB2 = TAG_Bool(IS_EQUAL_OO(REGB0,REGB1));
     if (UNTAG_Bool(REGB2)) {
     } else {
-      /* ../lib/standard/kernel.nit:230 */
+      /* ../lib/standard/kernel.nit:237 */
       REGB1 = TAG_Bool((REGB0)==(REGB1));
-      /* ../lib/standard/collection/array.nit:618 */
+      /* ../lib/standard/collection/array.nit:619 */
       REGB2 = REGB1;
     }
   } else {
@@ -4704,14 +4706,14 @@ val_t standard___collection___array___ArrayMapKeys___is_empty(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 = 619;
+  fra.me.line = 620;
   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 */
+  /* ../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___is_empty(fra.me.REG[0])(fra.me.REG[0]);
   goto label1;
@@ -4726,14 +4728,14 @@ val_t standard___collection___array___ArrayMapKeys___length(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 = 620;
+  fra.me.line = 621;
   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 */
+  /* ../lib/standard/collection/array.nit:621 */
   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;
@@ -4747,14 +4749,14 @@ val_t standard___collection___array___ArrayMapKeys___iterator(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 = 621;
+  fra.me.line = 622;
   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 */
+  /* ../lib/standard/collection/array.nit:622 */
   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]);
@@ -4769,14 +4771,14 @@ void standard___collection___array___ArrayMapKeys___clear(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 = 622;
+  fra.me.line = 623;
   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 */
+  /* ../lib/standard/collection/array.nit:623 */
   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;
@@ -4791,7 +4793,7 @@ void standard___collection___array___ArrayMapKeys___remove(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 = 623;
+  fra.me.line = 624;
   fra.me.meth = LOCATE_standard___collection___array___ArrayMapKeys___remove;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
@@ -4801,19 +4803,19 @@ void standard___collection___array___ArrayMapKeys___remove(val_t p0, val_t p1){
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ../lib/standard/collection/array.nit:625 */
+  /* ../lib/standard/collection/array.nit:626 */
   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 */
+  /* ../lib/standard/collection/array.nit:627 */
   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 */
+  /* ../lib/standard/kernel.nit:243 */
   REGB1 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB1));
-  /* ../lib/standard/collection/array.nit:626 */
+  /* ../lib/standard/collection/array.nit:627 */
   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);
@@ -4827,7 +4829,7 @@ void standard___collection___array___ArrayMapKeys___remove_all(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 = 628;
+  fra.me.line = 629;
   fra.me.meth = LOCATE_standard___collection___array___ArrayMapKeys___remove_all;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
@@ -4836,7 +4838,7 @@ void standard___collection___array___ArrayMapKeys___remove_all(val_t p0, val_t p
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ../lib/standard/collection/array.nit:628 */
+  /* ../lib/standard/collection/array.nit:629 */
   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;
@@ -4870,18 +4872,18 @@ val_t standard___collection___array___ArrayMapValues___map(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 = 633;
+  fra.me.line = 634;
   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 */
+  /* ../lib/standard/collection/array.nit:634 */
   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);
+    nit_abort("Uninitialized attribute %s", "@map", LOCATE_standard___collection___array, 634);
   }
   fra.me.REG[0] = ATTR_standard___collection___array___ArrayMapValues_____atmap(fra.me.REG[0]);
   stack_frame_head = fra.me.prev;
@@ -4893,7 +4895,7 @@ void standard___collection___array___ArrayMapValues___map__eq(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 = 633;
+  fra.me.line = 634;
   fra.me.meth = LOCATE_standard___collection___array___ArrayMapValues___map__eq;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
@@ -4902,7 +4904,7 @@ void standard___collection___array___ArrayMapValues___map__eq(val_t p0, val_t p1
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ../lib/standard/collection/array.nit:633 */
+  /* ../lib/standard/collection/array.nit:634 */
   ATTR_standard___collection___array___ArrayMapValues_____atmap(fra.me.REG[0]) = fra.me.REG[1];
   stack_frame_head = fra.me.prev;
   return;
@@ -4914,25 +4916,25 @@ val_t standard___collection___array___ArrayMapValues___first(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 = 635;
+  fra.me.line = 636;
   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 */
+  /* ../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 = 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);
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 636);
   }
   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);
+    nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 636);
   }
   fra.me.REG[0] = CALL_standard___collection___abstract_collection___Couple___second(fra.me.REG[0])(fra.me.REG[0]);
   goto label1;
@@ -4947,14 +4949,14 @@ val_t standard___collection___array___ArrayMapValues___is_empty(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 = 636;
+  fra.me.line = 637;
   fra.me.meth = LOCATE_standard___collection___array___ArrayMapValues___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:636 */
+  /* ../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___is_empty(fra.me.REG[0])(fra.me.REG[0]);
   goto label1;
@@ -4969,14 +4971,14 @@ val_t standard___collection___array___ArrayMapValues___length(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 = 637;
+  fra.me.line = 638;
   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:637 */
+  /* ../lib/standard/collection/array.nit:638 */
   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;
@@ -4990,14 +4992,14 @@ val_t standard___collection___array___ArrayMapValues___iterator(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 = 638;
+  fra.me.line = 639;
   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;
-  /* ../lib/standard/collection/array.nit:638 */
+  /* ../lib/standard/collection/array.nit:639 */
   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]);
@@ -5015,7 +5017,7 @@ val_t standard___collection___array___ArrayMapValues___has(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 = 640;
+  fra.me.line = 641;
   fra.me.meth = LOCATE_standard___collection___array___ArrayMapValues___has;
   fra.me.has_broke = 0;
   fra.me.REG_size = 4;
@@ -5026,26 +5028,26 @@ val_t standard___collection___array___ArrayMapValues___has(val_t p0, val_t p1){
   fra.me.REG[3] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ../lib/standard/collection/array.nit:643 */
+  /* ../lib/standard/collection/array.nit:644 */
   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);
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 644);
   }
   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 */
+  REGB0 = TAG_Int(0);
+  /* ../lib/standard/collection/array.nit:271 */
   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);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 271);
   }
   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 */
+  fra.me.REG[2] = ATTR_standard___collection___array___Array____items(fra.me.REG[0]);
+  /* ../lib/standard/collection/array.nit:273 */
   while(1) {
     /* ../lib/standard/collection/array.nit:24 */
     REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
@@ -5059,18 +5061,18 @@ val_t standard___collection___array___ArrayMapValues___has(val_t p0, val_t p1){
     } else {
       nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
     }
-    /* ../lib/standard/kernel.nit:235 */
+    /* ../lib/standard/kernel.nit:242 */
     REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
-    /* ../lib/standard/collection/array.nit:272 */
+    /* ../lib/standard/collection/array.nit:273 */
     if (UNTAG_Bool(REGB1)) {
-      /* ../lib/standard/collection/array.nit:273 */
+      /* ../lib/standard/collection/array.nit:274 */
       REGB1 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
       if (UNTAG_Bool(REGB1)) {
-        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 273);
+        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 274);
       }
-      /* ../lib/standard/collection/array.nit:724 */
+      /* ../lib/standard/collection/array.nit:725 */
       fra.me.REG[3] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB0)];
-      /* ../lib/standard/collection/array.nit:643 */
+      /* ../lib/standard/collection/array.nit:644 */
       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)) {
@@ -5088,19 +5090,19 @@ val_t standard___collection___array___ArrayMapValues___has(val_t p0, val_t p1){
         REGB1 = TAG_Bool(1);
         goto label1;
       }
-      /* ../lib/standard/collection/array.nit:274 */
+      /* ../lib/standard/collection/array.nit:275 */
       REGB2 = TAG_Int(1);
-      /* ../lib/standard/kernel.nit:238 */
+      /* ../lib/standard/kernel.nit:245 */
       REGB2 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB2));
-      /* ../lib/standard/collection/array.nit:274 */
+      /* ../lib/standard/collection/array.nit:275 */
       REGB0 = REGB2;
     } else {
-      /* ../lib/standard/collection/array.nit:272 */
+      /* ../lib/standard/collection/array.nit:273 */
       goto label2;
     }
   }
   label2: while(0);
-  /* ../lib/standard/collection/array.nit:644 */
+  /* ../lib/standard/collection/array.nit:645 */
   REGB0 = TAG_Bool(0);
   REGB1 = REGB0;
   goto label1;
@@ -5117,7 +5119,7 @@ val_t standard___collection___array___ArrayMapValues___has_only(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 = 647;
+  fra.me.line = 648;
   fra.me.meth = LOCATE_standard___collection___array___ArrayMapValues___has_only;
   fra.me.has_broke = 0;
   fra.me.REG_size = 4;
@@ -5128,26 +5130,26 @@ val_t standard___collection___array___ArrayMapValues___has_only(val_t p0, val_t
   fra.me.REG[3] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ../lib/standard/collection/array.nit:650 */
+  /* ../lib/standard/collection/array.nit:651 */
   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);
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 651);
   }
   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 */
+  REGB0 = TAG_Int(0);
+  /* ../lib/standard/collection/array.nit:271 */
   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);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 271);
   }
   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 */
+  fra.me.REG[2] = ATTR_standard___collection___array___Array____items(fra.me.REG[0]);
+  /* ../lib/standard/collection/array.nit:273 */
   while(1) {
     /* ../lib/standard/collection/array.nit:24 */
     REGB1 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
@@ -5161,18 +5163,18 @@ val_t standard___collection___array___ArrayMapValues___has_only(val_t p0, val_t
     } else {
       nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
     }
-    /* ../lib/standard/kernel.nit:235 */
+    /* ../lib/standard/kernel.nit:242 */
     REGB1 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB1));
-    /* ../lib/standard/collection/array.nit:272 */
+    /* ../lib/standard/collection/array.nit:273 */
     if (UNTAG_Bool(REGB1)) {
-      /* ../lib/standard/collection/array.nit:273 */
+      /* ../lib/standard/collection/array.nit:274 */
       REGB1 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
       if (UNTAG_Bool(REGB1)) {
-        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 273);
+        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 274);
       }
-      /* ../lib/standard/collection/array.nit:724 */
+      /* ../lib/standard/collection/array.nit:725 */
       fra.me.REG[3] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB0)];
-      /* ../lib/standard/collection/array.nit:650 */
+      /* ../lib/standard/collection/array.nit:651 */
       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)) {
@@ -5191,19 +5193,19 @@ val_t standard___collection___array___ArrayMapValues___has_only(val_t p0, val_t
         REGB1 = TAG_Bool(0);
         goto label1;
       }
-      /* ../lib/standard/collection/array.nit:274 */
+      /* ../lib/standard/collection/array.nit:275 */
       REGB2 = TAG_Int(1);
-      /* ../lib/standard/kernel.nit:238 */
+      /* ../lib/standard/kernel.nit:245 */
       REGB2 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB2));
-      /* ../lib/standard/collection/array.nit:274 */
+      /* ../lib/standard/collection/array.nit:275 */
       REGB0 = REGB2;
     } else {
-      /* ../lib/standard/collection/array.nit:272 */
+      /* ../lib/standard/collection/array.nit:273 */
       goto label2;
     }
   }
   label2: while(0);
-  /* ../lib/standard/collection/array.nit:651 */
+  /* ../lib/standard/collection/array.nit:652 */
   REGB0 = TAG_Bool(1);
   REGB1 = REGB0;
   goto label1;
@@ -5221,7 +5223,7 @@ val_t standard___collection___array___ArrayMapValues___count(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 = 654;
+  fra.me.line = 655;
   fra.me.meth = LOCATE_standard___collection___array___ArrayMapValues___count;
   fra.me.has_broke = 0;
   fra.me.REG_size = 4;
@@ -5232,28 +5234,28 @@ val_t standard___collection___array___ArrayMapValues___count(val_t p0, val_t p1)
   fra.me.REG[3] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ../lib/standard/collection/array.nit:657 */
-  REGB0 = TAG_Int(0);
   /* ../lib/standard/collection/array.nit:658 */
+  REGB0 = TAG_Int(0);
+  /* ../lib/standard/collection/array.nit:659 */
   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, 658);
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 659);
   }
   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 */
+  REGB1 = TAG_Int(0);
+  /* ../lib/standard/collection/array.nit:271 */
   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, 270);
+    nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 271);
   }
   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 */
+  fra.me.REG[2] = ATTR_standard___collection___array___Array____items(fra.me.REG[0]);
+  /* ../lib/standard/collection/array.nit:273 */
   while(1) {
     /* ../lib/standard/collection/array.nit:24 */
     REGB2 = TAG_Bool(ATTR_standard___collection___array___AbstractArrayRead____length(fra.me.REG[0])!=NIT_NULL);
@@ -5267,18 +5269,18 @@ val_t standard___collection___array___ArrayMapValues___count(val_t p0, val_t p1)
     } else {
       nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
     }
-    /* ../lib/standard/kernel.nit:235 */
+    /* ../lib/standard/kernel.nit:242 */
     REGB2 = TAG_Bool(UNTAG_Int(REGB1)<UNTAG_Int(REGB2));
-    /* ../lib/standard/collection/array.nit:272 */
+    /* ../lib/standard/collection/array.nit:273 */
     if (UNTAG_Bool(REGB2)) {
-      /* ../lib/standard/collection/array.nit:273 */
+      /* ../lib/standard/collection/array.nit:274 */
       REGB2 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
       if (UNTAG_Bool(REGB2)) {
-        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 273);
+        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 274);
       }
-      /* ../lib/standard/collection/array.nit:724 */
+      /* ../lib/standard/collection/array.nit:725 */
       fra.me.REG[3] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB1)];
-      /* ../lib/standard/collection/array.nit:658 */
+      /* ../lib/standard/collection/array.nit:659 */
       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)) {
@@ -5294,24 +5296,24 @@ val_t standard___collection___array___ArrayMapValues___count(val_t p0, val_t p1)
       }
       if (UNTAG_Bool(REGB2)) {
         REGB2 = TAG_Int(1);
-        /* ../lib/standard/kernel.nit:238 */
+        /* ../lib/standard/kernel.nit:245 */
         REGB2 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB2));
-        /* ../lib/standard/collection/array.nit:658 */
+        /* ../lib/standard/collection/array.nit:659 */
         REGB0 = REGB2;
       }
-      /* ../lib/standard/collection/array.nit:274 */
+      /* ../lib/standard/collection/array.nit:275 */
       REGB2 = TAG_Int(1);
-      /* ../lib/standard/kernel.nit:238 */
+      /* ../lib/standard/kernel.nit:245 */
       REGB2 = TAG_Int(UNTAG_Int(REGB1)+UNTAG_Int(REGB2));
-      /* ../lib/standard/collection/array.nit:274 */
+      /* ../lib/standard/collection/array.nit:275 */
       REGB1 = REGB2;
     } else {
-      /* ../lib/standard/collection/array.nit:272 */
+      /* ../lib/standard/collection/array.nit:273 */
       goto label1;
     }
   }
   label1: while(0);
-  /* ../lib/standard/collection/array.nit:659 */
+  /* ../lib/standard/collection/array.nit:660 */
   goto label2;
   label2: while(0);
   stack_frame_head = fra.me.prev;
@@ -5323,14 +5325,14 @@ void standard___collection___array___ArrayMapValues___clear(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 = 662;
+  fra.me.line = 663;
   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 */
+  /* ../lib/standard/collection/array.nit:663 */
   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;
@@ -5346,7 +5348,7 @@ void standard___collection___array___ArrayMapValues___remove(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 = 664;
+  fra.me.line = 665;
   fra.me.meth = LOCATE_standard___collection___array___ArrayMapValues___remove;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
@@ -5356,13 +5358,13 @@ void standard___collection___array___ArrayMapValues___remove(val_t p0, val_t p1)
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
-  /* ../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 */
+  fra.me.REG[0] = CALL_standard___collection___array___ArrayMapValues___map(fra.me.REG[0])(fra.me.REG[0]);
+  /* ../lib/standard/collection/array.nit:668 */
   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, 667);
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 668);
   }
   fra.me.REG[2] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
   /* ../lib/standard/collection/array.nit:24 */
@@ -5372,11 +5374,11 @@ void standard___collection___array___ArrayMapValues___remove(val_t p0, val_t p1)
     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:667 */
+  /* ../lib/standard/collection/array.nit:668 */
   REGB1 = TAG_Int(1);
-  /* ../lib/standard/kernel.nit:240 */
+  /* ../lib/standard/kernel.nit:247 */
   REGB1 = TAG_Int(UNTAG_Int(REGB0)-UNTAG_Int(REGB1));
-  /* ../lib/standard/collection/array.nit:668 */
+  /* ../lib/standard/collection/array.nit:669 */
   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*/;
@@ -5384,34 +5386,34 @@ void standard___collection___array___ArrayMapValues___remove(val_t p0, val_t p1)
     } else {
       nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
     }
-    /* ../lib/standard/kernel.nit:236 */
+    /* ../lib/standard/kernel.nit:243 */
     REGB0 = TAG_Bool(UNTAG_Int(REGB1)>=UNTAG_Int(REGB0));
-    /* ../lib/standard/collection/array.nit:668 */
+    /* ../lib/standard/collection/array.nit:669 */
     if (UNTAG_Bool(REGB0)) {
-      /* ../lib/standard/collection/array.nit:669 */
+      /* ../lib/standard/collection/array.nit:670 */
       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);
+        nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 670);
       }
       fra.me.REG[2] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
-      /* ../lib/standard/collection/array.nit:278 */
+      /* ../lib/standard/collection/array.nit:279 */
       REGB0 = REGB1;
-      /* ../lib/standard/collection/array.nit:280 */
+      /* ../lib/standard/collection/array.nit:281 */
       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 */
+      /* ../lib/standard/kernel.nit:243 */
       REGB2 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB2));
-      /* ../lib/standard/collection/array.nit:280 */
+      /* ../lib/standard/collection/array.nit:281 */
       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);
+          nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 281);
         }
         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*/;
@@ -5419,32 +5421,32 @@ void standard___collection___array___ArrayMapValues___remove(val_t p0, val_t p1)
         } else {
           nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
         }
-        /* ../lib/standard/kernel.nit:235 */
+        /* ../lib/standard/kernel.nit:242 */
         REGB2 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB2));
       } else {
-        /* ../lib/standard/collection/array.nit:280 */
+        /* ../lib/standard/collection/array.nit:281 */
         REGB3 = TAG_Bool(0);
         REGB2 = REGB3;
       }
       if (UNTAG_Bool(REGB2)) {
       } else {
-        nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
+        nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 281);
       }
-      /* ../lib/standard/collection/array.nit:281 */
+      /* ../lib/standard/collection/array.nit:282 */
       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);
+        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 282);
       }
-      /* ../lib/standard/collection/array.nit:724 */
+      /* ../lib/standard/collection/array.nit:725 */
       fra.me.REG[2] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB0)];
-      /* ../lib/standard/collection/array.nit:281 */
+      /* ../lib/standard/collection/array.nit:282 */
       goto label1;
       label1: while(0);
-      /* ../lib/standard/collection/array.nit:669 */
+      /* ../lib/standard/collection/array.nit:670 */
       REGB0 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
       if (UNTAG_Bool(REGB0)) {
-        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 669);
+        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 670);
       }
       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]));
@@ -5460,19 +5462,19 @@ void standard___collection___array___ArrayMapValues___remove(val_t p0, val_t p1)
         }
       }
       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 */
+        CALL_standard___collection___array___ArrayMap___remove_at_index(fra.me.REG[0])(fra.me.REG[0], REGB1);
+        /* ../lib/standard/collection/array.nit:672 */
         goto label2;
       }
-      /* ../lib/standard/collection/array.nit:673 */
+      /* ../lib/standard/collection/array.nit:674 */
       REGB0 = TAG_Int(1);
-      /* ../lib/standard/kernel.nit:240 */
+      /* ../lib/standard/kernel.nit:247 */
       REGB0 = TAG_Int(UNTAG_Int(REGB1)-UNTAG_Int(REGB0));
-      /* ../lib/standard/collection/array.nit:673 */
+      /* ../lib/standard/collection/array.nit:674 */
       REGB1 = REGB0;
     } else {
-      /* ../lib/standard/collection/array.nit:668 */
+      /* ../lib/standard/collection/array.nit:669 */
       goto label3;
     }
   }
@@ -5491,7 +5493,7 @@ void standard___collection___array___ArrayMapValues___remove_all(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 = 677;
+  fra.me.line = 678;
   fra.me.meth = LOCATE_standard___collection___array___ArrayMapValues___remove_all;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
@@ -5501,13 +5503,13 @@ void standard___collection___array___ArrayMapValues___remove_all(val_t p0, val_t
   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 */
+  fra.me.REG[0] = CALL_standard___collection___array___ArrayMapValues___map(fra.me.REG[0])(fra.me.REG[0]);
+  /* ../lib/standard/collection/array.nit:681 */
   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, 680);
+    nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 681);
   }
   fra.me.REG[2] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
   /* ../lib/standard/collection/array.nit:24 */
@@ -5517,11 +5519,11 @@ void standard___collection___array___ArrayMapValues___remove_all(val_t p0, val_t
     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:680 */
+  /* ../lib/standard/collection/array.nit:681 */
   REGB1 = TAG_Int(1);
-  /* ../lib/standard/kernel.nit:240 */
+  /* ../lib/standard/kernel.nit:247 */
   REGB1 = TAG_Int(UNTAG_Int(REGB0)-UNTAG_Int(REGB1));
-  /* ../lib/standard/collection/array.nit:681 */
+  /* ../lib/standard/collection/array.nit:682 */
   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*/;
@@ -5529,34 +5531,34 @@ void standard___collection___array___ArrayMapValues___remove_all(val_t p0, val_t
     } else {
       nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
     }
-    /* ../lib/standard/kernel.nit:236 */
+    /* ../lib/standard/kernel.nit:243 */
     REGB0 = TAG_Bool(UNTAG_Int(REGB1)>=UNTAG_Int(REGB0));
-    /* ../lib/standard/collection/array.nit:681 */
+    /* ../lib/standard/collection/array.nit:682 */
     if (UNTAG_Bool(REGB0)) {
-      /* ../lib/standard/collection/array.nit:682 */
+      /* ../lib/standard/collection/array.nit:683 */
       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, 682);
+        nit_abort("Uninitialized attribute %s", "_items", LOCATE_standard___collection___array, 683);
       }
       fra.me.REG[2] = ATTR_standard___collection___array___ArrayMap____items(fra.me.REG[0]);
-      /* ../lib/standard/collection/array.nit:278 */
+      /* ../lib/standard/collection/array.nit:279 */
       REGB0 = REGB1;
-      /* ../lib/standard/collection/array.nit:280 */
+      /* ../lib/standard/collection/array.nit:281 */
       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 */
+      /* ../lib/standard/kernel.nit:243 */
       REGB2 = TAG_Bool(UNTAG_Int(REGB0)>=UNTAG_Int(REGB2));
-      /* ../lib/standard/collection/array.nit:280 */
+      /* ../lib/standard/collection/array.nit:281 */
       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);
+          nit_abort("Uninitialized attribute %s", "_length", LOCATE_standard___collection___array, 281);
         }
         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*/;
@@ -5564,32 +5566,32 @@ void standard___collection___array___ArrayMapValues___remove_all(val_t p0, val_t
         } else {
           nit_abort("Cast failed", NULL, LOCATE_standard___kernel, 0);
         }
-        /* ../lib/standard/kernel.nit:235 */
+        /* ../lib/standard/kernel.nit:242 */
         REGB2 = TAG_Bool(UNTAG_Int(REGB0)<UNTAG_Int(REGB2));
       } else {
-        /* ../lib/standard/collection/array.nit:280 */
+        /* ../lib/standard/collection/array.nit:281 */
         REGB3 = TAG_Bool(0);
         REGB2 = REGB3;
       }
       if (UNTAG_Bool(REGB2)) {
       } else {
-        nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 280);
+        nit_abort("Assert '%s' failed", "index", LOCATE_standard___collection___array, 281);
       }
-      /* ../lib/standard/collection/array.nit:281 */
+      /* ../lib/standard/collection/array.nit:282 */
       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);
+        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 282);
       }
-      /* ../lib/standard/collection/array.nit:724 */
+      /* ../lib/standard/collection/array.nit:725 */
       fra.me.REG[2] = ((Nit_NativeArray)fra.me.REG[2])->val[UNTAG_Int(REGB0)];
-      /* ../lib/standard/collection/array.nit:281 */
+      /* ../lib/standard/collection/array.nit:282 */
       goto label1;
       label1: while(0);
-      /* ../lib/standard/collection/array.nit:682 */
+      /* ../lib/standard/collection/array.nit:683 */
       REGB0 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
       if (UNTAG_Bool(REGB0)) {
-        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 682);
+        nit_abort("Reciever is null", NULL, LOCATE_standard___collection___array, 683);
       }
       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]));
@@ -5605,17 +5607,17 @@ void standard___collection___array___ArrayMapValues___remove_all(val_t p0, val_t
         }
       }
       if (UNTAG_Bool(REGB0)) {
-        /* ../lib/standard/collection/array.nit:683 */
+        /* ../lib/standard/collection/array.nit:684 */
         CALL_standard___collection___array___ArrayMap___remove_at_index(fra.me.REG[0])(fra.me.REG[0], REGB1);
       }
-      /* ../lib/standard/collection/array.nit:685 */
+      /* ../lib/standard/collection/array.nit:686 */
       REGB0 = TAG_Int(1);
-      /* ../lib/standard/kernel.nit:240 */
+      /* ../lib/standard/kernel.nit:247 */
       REGB0 = TAG_Int(UNTAG_Int(REGB1)-UNTAG_Int(REGB0));
-      /* ../lib/standard/collection/array.nit:685 */
+      /* ../lib/standard/collection/array.nit:686 */
       REGB1 = REGB0;
     } else {
-      /* ../lib/standard/collection/array.nit:681 */
+      /* ../lib/standard/collection/array.nit:682 */
       goto label2;
     }
   }
@@ -5652,7 +5654,7 @@ val_t standard___collection___array___Iterator___to_a(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 = 694;
+  fra.me.line = 695;
   fra.me.meth = LOCATE_standard___collection___array___Iterator___to_a;
   fra.me.has_broke = 0;
   fra.me.REG_size = 3;
@@ -5661,24 +5663,24 @@ val_t standard___collection___array___Iterator___to_a(val_t p0){
   fra.me.REG[1] = NIT_NULL;
   fra.me.REG[2] = NIT_NULL;
   fra.me.REG[0] = p0;
-  /* ../lib/standard/collection/array.nit:697 */
-  fra.me.REG[1] = NEW_Array_standard___collection___array___Array___init();
   /* ../lib/standard/collection/array.nit:698 */
+  fra.me.REG[1] = NEW_Array_standard___collection___array___Array___init();
+  /* ../lib/standard/collection/array.nit:699 */
   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:699 */
+      /* ../lib/standard/collection/array.nit:700 */
       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:700 */
+      /* ../lib/standard/collection/array.nit:701 */
       CALL_standard___collection___abstract_collection___Iterator___next(fra.me.REG[0])(fra.me.REG[0]);
     } else {
-      /* ../lib/standard/collection/array.nit:698 */
+      /* ../lib/standard/collection/array.nit:699 */
       goto label1;
     }
   }
   label1: while(0);
-  /* ../lib/standard/collection/array.nit:702 */
+  /* ../lib/standard/collection/array.nit:703 */
   goto label2;
   label2: while(0);
   stack_frame_head = fra.me.prev;
@@ -5690,14 +5692,14 @@ val_t standard___collection___array___Collection___to_a(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 = 707;
+  fra.me.line = 708;
   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:710 */
+  /* ../lib/standard/collection/array.nit:711 */
   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;
@@ -5712,7 +5714,7 @@ val_t standard___collection___array___ArrayCapable___calloc_array(val_t p0, 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 = 718;
+  fra.me.line = 719;
   fra.me.meth = LOCATE_standard___collection___array___ArrayCapable___calloc_array;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
@@ -5720,7 +5722,7 @@ val_t standard___collection___array___ArrayCapable___calloc_array(val_t p0, val_
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
   REGB0 = p1;
-  /* ../lib/standard/collection/array.nit:718 */
+  /* ../lib/standard/collection/array.nit:719 */
   fra.me.REG[0] = NEW_NativeArray(UNTAG_Int(REGB0), sizeof(val_t));
   stack_frame_head = fra.me.prev;
   return fra.me.REG[0];
@@ -5732,7 +5734,7 @@ val_t standard___collection___array___NativeArray_____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 = 724;
+  fra.me.line = 725;
   fra.me.meth = LOCATE_standard___collection___array___NativeArray_____bra;
   fra.me.has_broke = 0;
   fra.me.REG_size = 1;
@@ -5740,7 +5742,7 @@ val_t standard___collection___array___NativeArray_____bra(val_t p0, val_t p1){
   fra.me.REG[0] = NIT_NULL;
   fra.me.REG[0] = p0;
   REGB0 = p1;
-  /* ../lib/standard/collection/array.nit:724 */
+  /* ../lib/standard/collection/array.nit:725 */
   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];
@@ -5752,7 +5754,7 @@ void standard___collection___array___NativeArray_____braeq(val_t p0, val_t p1, v
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 725;
+  fra.me.line = 726;
   fra.me.meth = LOCATE_standard___collection___array___NativeArray_____braeq;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
@@ -5762,7 +5764,7 @@ void standard___collection___array___NativeArray_____braeq(val_t p0, val_t p1, v
   fra.me.REG[0] = p0;
   REGB0 = p1;
   fra.me.REG[1] = p2;
-  /* ../lib/standard/collection/array.nit:725 */
+  /* ../lib/standard/collection/array.nit:726 */
   ((Nit_NativeArray)fra.me.REG[0])->val[UNTAG_Int(REGB0)]=fra.me.REG[1];
   stack_frame_head = fra.me.prev;
   return;
@@ -5774,7 +5776,7 @@ void standard___collection___array___NativeArray___copy_to(val_t p0, val_t p1, v
   val_t tmp;
   fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
   fra.me.file = LOCATE_standard___collection___array;
-  fra.me.line = 726;
+  fra.me.line = 727;
   fra.me.meth = LOCATE_standard___collection___array___NativeArray___copy_to;
   fra.me.has_broke = 0;
   fra.me.REG_size = 2;
@@ -5784,7 +5786,7 @@ void standard___collection___array___NativeArray___copy_to(val_t p0, val_t p1, v
   fra.me.REG[0] = p0;
   fra.me.REG[1] = p1;
   REGB0 = p2;
-  /* ../lib/standard/collection/array.nit:726 */
+  /* ../lib/standard/collection/array.nit:727 */
   (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;