Merge branch 'pu/parser_tables_in_c' into wip

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

diff --git a/c_src/abstract_collection._sep.c b/c_src/abstract_collection._sep.c
index 957417a..b3774b9 100644 (file)
--- a/c_src/abstract_collection._sep.c
+++ b/c_src/abstract_collection._sep.c
@@ -1,897 +1,1758 @@
 /* This C file is generated by NIT to compile module abstract_collection. */
 #include "abstract_collection._sep.h"
-val_t abstract_collection___Collection___iterator(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::Collection::iterator (bin/../lib/standard//abstract_collection.nit:42,2--43:26)"};
-  trace.prev = tracehead; tracehead = &trace;
-  fprintf(stderr, "Deferred method iterator called (bin/../lib/standard//abstract_collection.nit:42,2)\n");
+val_t abstract_collection___Collection___iterator(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 42;
+  fra.me.meth = LOCATE_abstract_collection___Collection___iterator;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 0;
+  /* ./../lib/standard//collection//abstract_collection.nit:42 */
+  fprintf(stderr, "Deferred method called");
+  fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 42);
   nit_exit(1);
-  tracehead = trace.prev;
+  stack_frame_head = fra.me.prev;
   return NIT_NULL;
 }
-val_t abstract_collection___Collection___is_empty(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::Collection::is_empty (bin/../lib/standard//abstract_collection.nit:45,2--46:20)"};
-  trace.prev = tracehead; tracehead = &trace;
-  fprintf(stderr, "Deferred method is_empty called (bin/../lib/standard//abstract_collection.nit:45,2)\n");
+val_t abstract_collection___Collection___is_empty(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 45;
+  fra.me.meth = LOCATE_abstract_collection___Collection___is_empty;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 0;
+  /* ./../lib/standard//collection//abstract_collection.nit:45 */
+  fprintf(stderr, "Deferred method called");
+  fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 45);
   nit_exit(1);
-  tracehead = trace.prev;
+  stack_frame_head = fra.me.prev;
   return NIT_NULL;
 }
-val_t abstract_collection___Collection___length(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::Collection::length (bin/../lib/standard//abstract_collection.nit:48,2--49:17)"};
-  trace.prev = tracehead; tracehead = &trace;
-  fprintf(stderr, "Deferred method length called (bin/../lib/standard//abstract_collection.nit:48,2)\n");
+val_t abstract_collection___Collection___length(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 48;
+  fra.me.meth = LOCATE_abstract_collection___Collection___length;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 0;
+  /* ./../lib/standard//collection//abstract_collection.nit:48 */
+  fprintf(stderr, "Deferred method called");
+  fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 48);
   nit_exit(1);
-  tracehead = trace.prev;
+  stack_frame_head = fra.me.prev;
   return NIT_NULL;
 }
-val_t abstract_collection___Collection___has(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::Collection::has (bin/../lib/standard//abstract_collection.nit:51,2--53:24)"};
-  trace.prev = tracehead; tracehead = &trace;
-  fprintf(stderr, "Deferred method has called (bin/../lib/standard//abstract_collection.nit:51,2)\n");
+val_t abstract_collection___Collection___has(val_t p0, val_t p1){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 51;
+  fra.me.meth = LOCATE_abstract_collection___Collection___has;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 0;
+  /* ./../lib/standard//collection//abstract_collection.nit:51 */
+  fprintf(stderr, "Deferred method called");
+  fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 51);
   nit_exit(1);
-  tracehead = trace.prev;
+  stack_frame_head = fra.me.prev;
   return NIT_NULL;
 }
-val_t abstract_collection___Collection___has_only(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::Collection::has_only (bin/../lib/standard//abstract_collection.nit:55,2--58:29)"};
-  trace.prev = tracehead; tracehead = &trace;
-  fprintf(stderr, "Deferred method has_only called (bin/../lib/standard//abstract_collection.nit:55,2)\n");
+val_t abstract_collection___Collection___has_only(val_t p0, val_t p1){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 55;
+  fra.me.meth = LOCATE_abstract_collection___Collection___has_only;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 0;
+  /* ./../lib/standard//collection//abstract_collection.nit:55 */
+  fprintf(stderr, "Deferred method called");
+  fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 55);
   nit_exit(1);
-  tracehead = trace.prev;
+  stack_frame_head = fra.me.prev;
   return NIT_NULL;
 }
-val_t abstract_collection___Collection___count(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::Collection::count (bin/../lib/standard//abstract_collection.nit:60,2--62:25)"};
-  trace.prev = tracehead; tracehead = &trace;
-  fprintf(stderr, "Deferred method count called (bin/../lib/standard//abstract_collection.nit:60,2)\n");
+val_t abstract_collection___Collection___count(val_t p0, val_t p1){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 60;
+  fra.me.meth = LOCATE_abstract_collection___Collection___count;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 0;
+  /* ./../lib/standard//collection//abstract_collection.nit:60 */
+  fprintf(stderr, "Deferred method called");
+  fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 60);
   nit_exit(1);
-  tracehead = trace.prev;
+  stack_frame_head = fra.me.prev;
   return NIT_NULL;
 }
-val_t abstract_collection___Collection___first(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::Collection::first (bin/../lib/standard//abstract_collection.nit:64,2--65:14)"};
-  trace.prev = tracehead; tracehead = &trace;
-  fprintf(stderr, "Deferred method first called (bin/../lib/standard//abstract_collection.nit:64,2)\n");
+val_t abstract_collection___Collection___first(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 64;
+  fra.me.meth = LOCATE_abstract_collection___Collection___first;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 0;
+  /* ./../lib/standard//collection//abstract_collection.nit:64 */
+  fprintf(stderr, "Deferred method called");
+  fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 64);
   nit_exit(1);
-  tracehead = trace.prev;
+  stack_frame_head = fra.me.prev;
   return NIT_NULL;
 }
-val_t abstract_collection___NaiveCollection___is_empty(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::NaiveCollection::is_empty (bin/../lib/standard//abstract_collection.nit:72,2--42)"};
-  val_t variable0;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 = ((abstract_collection___NaiveCollection___length_t)CALL( self,COLOR_abstract_collection___Collection___length))( self) /*NaiveCollection::length*/;
-  variable0 = TAG_Bool((variable0)==( TAG_Int(0)));
-  goto return_label0;
-  return_label0: while(false);
-  tracehead = trace.prev;
-  return variable0;
-}
-val_t abstract_collection___NaiveCollection___length(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::NaiveCollection::length (bin/../lib/standard//abstract_collection.nit:74,2--78:11)"};
-  val_t variable0;
-  val_t variable1;
-    val_t variable2;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 =  TAG_Int(0);
-  variable1 = ((abstract_collection___Collection___iterator_t)CALL( self,COLOR_abstract_collection___Collection___iterator))( self) /*NaiveCollection::iterator*/;
-  while (true) { /*for*/
-    variable2 = ((abstract_collection___Iterator___is_ok_t)CALL(variable1,COLOR_abstract_collection___Iterator___is_ok))(variable1) /*Iterator::is_ok*/;
-    if (!UNTAG_Bool(variable2)) break; /*for*/
-    variable2 = ((abstract_collection___Iterator___item_t)CALL(variable1,COLOR_abstract_collection___Iterator___item))(variable1) /*Iterator::item*/;
-    variable0 = TAG_Int(UNTAG_Int(variable0)+UNTAG_Int( variable0 /*nb*/)) /*nb*/;
-    continue_2: while(0);
-    ((abstract_collection___Iterator___next_t)CALL(variable1,COLOR_abstract_collection___Iterator___next))(variable1) /*Iterator::next*/;
-  }
-  break_2: while(0);
-  variable0 =  variable0 /*nb*/;
-  goto return_label1;
-  return_label1: while(false);
-  tracehead = trace.prev;
-  return variable0;
-}
-val_t abstract_collection___NaiveCollection___has(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::NaiveCollection::has (bin/../lib/standard//abstract_collection.nit:81,2--84:14)"};
-  val_t variable0;
-  val_t variable1;
-    val_t variable2;
-    val_t variable3;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 =  param0;
-  variable1 = ((abstract_collection___Collection___iterator_t)CALL( self,COLOR_abstract_collection___Collection___iterator))( self) /*NaiveCollection::iterator*/;
-  while (true) { /*for*/
-    variable2 = ((abstract_collection___Iterator___is_ok_t)CALL(variable1,COLOR_abstract_collection___Iterator___is_ok))(variable1) /*Iterator::is_ok*/;
-    if (!UNTAG_Bool(variable2)) break; /*for*/
-    variable2 = ((abstract_collection___Iterator___item_t)CALL(variable1,COLOR_abstract_collection___Iterator___item))(variable1) /*Iterator::item*/;
-    variable3 = TAG_Bool(( variable2 /*i*/ ==  variable0 /*item*/) || (( variable2 /*i*/ != NIT_NULL) && ((((kernel___Object_____eqeq_t)CALL( variable2 /*i*/,COLOR_kernel___Object_____eqeq))==kernel___Object_____eqeq)?(IS_EQUAL_NN( variable2 /*i*/, variable0 /*item*/)):(UNTAG_Bool(((kernel___Object_____eqeq_t)CALL( variable2 /*i*/,COLOR_kernel___Object_____eqeq))( variable2 /*i*/,  variable0 /*item*/) /*Object::==*/)))));
-    if (UNTAG_Bool(variable3)) { /*if*/
-      variable1 =  TAG_Bool(true);
-      goto return_label3;
+val_t abstract_collection___NaiveCollection___is_empty(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t REGB2;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 72;
+  fra.me.meth = LOCATE_abstract_collection___NaiveCollection___is_empty;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  REGB0 = CALL_abstract_collection___Collection___length(fra.me.REG[0])(fra.me.REG[0]);
+  REGB1 = TAG_Int(0);
+  REGB2 = TAG_Bool(IS_EQUAL_OO(REGB0,REGB1));
+  /* ./../lib/standard//collection//abstract_collection.nit:72 */
+  if (UNTAG_Bool(REGB2)) {
+  } else {
+    REGB1 = TAG_Bool((REGB0)==(REGB1));
+    REGB2 = REGB1;
+  /* ./../lib/standard//collection//abstract_collection.nit:72 */
+  }
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB2;
+}
+val_t abstract_collection___NaiveCollection___length(val_t p0){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 74;
+  fra.me.meth = LOCATE_abstract_collection___NaiveCollection___length;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  REGB0 = TAG_Int(0);
+  fra.me.REG[0] = CALL_abstract_collection___Collection___iterator(fra.me.REG[0])(fra.me.REG[0]);
+  /* ./../lib/standard//collection//abstract_collection.nit:77 */
+  while(1) {
+    REGB1 = CALL_abstract_collection___Iterator___is_ok(fra.me.REG[0])(fra.me.REG[0]);
+    if (UNTAG_Bool(REGB1)) {
+      fra.me.REG[1] = CALL_abstract_collection___Iterator___item(fra.me.REG[0])(fra.me.REG[0]);
+      REGB1 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB0));
+      REGB0 = REGB1;
+    /* ./../lib/standard//collection//abstract_collection.nit:77 */
+    } else {
+      goto label1;
     }
-    continue_4: while(0);
-    ((abstract_collection___Iterator___next_t)CALL(variable1,COLOR_abstract_collection___Iterator___next))(variable1) /*Iterator::next*/;
-  }
-  break_4: while(0);
-  variable1 =  TAG_Bool(false);
-  goto return_label3;
-  return_label3: while(false);
-  tracehead = trace.prev;
-  return variable1;
-}
-val_t abstract_collection___NaiveCollection___has_only(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::NaiveCollection::has_only (bin/../lib/standard//abstract_collection.nit:87,2--90:13)"};
-  val_t variable0;
-  val_t variable1;
-    val_t variable2;
-    val_t variable3;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 =  param0;
-  variable1 = ((abstract_collection___Collection___iterator_t)CALL( self,COLOR_abstract_collection___Collection___iterator))( self) /*NaiveCollection::iterator*/;
-  while (true) { /*for*/
-    variable2 = ((abstract_collection___Iterator___is_ok_t)CALL(variable1,COLOR_abstract_collection___Iterator___is_ok))(variable1) /*Iterator::is_ok*/;
-    if (!UNTAG_Bool(variable2)) break; /*for*/
-    variable2 = ((abstract_collection___Iterator___item_t)CALL(variable1,COLOR_abstract_collection___Iterator___item))(variable1) /*Iterator::item*/;
-    variable3 = TAG_Bool(!UNTAG_Bool(TAG_Bool(( variable2 /*i*/ ==  variable0 /*item*/) || (( variable2 /*i*/ != NIT_NULL) && ((((kernel___Object_____eqeq_t)CALL( variable2 /*i*/,COLOR_kernel___Object_____eqeq))==kernel___Object_____eqeq)?(IS_EQUAL_NN( variable2 /*i*/, variable0 /*item*/)):(UNTAG_Bool(((kernel___Object_____eqeq_t)CALL( variable2 /*i*/,COLOR_kernel___Object_____eqeq))( variable2 /*i*/,  variable0 /*item*/) /*Object::==*/)))))));
-    if (UNTAG_Bool(variable3)) { /*if*/
-      variable1 =  TAG_Bool(false);
-      goto return_label5;
+    CALL_abstract_collection___Iterator___next(fra.me.REG[0])(fra.me.REG[0]);
+  }
+  label1: while(0);
+  /* ./../lib/standard//collection//abstract_collection.nit:78 */
+  goto label2;
+  label2: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+val_t abstract_collection___NaiveCollection___has(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 81;
+  fra.me.meth = LOCATE_abstract_collection___NaiveCollection___has;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 3;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  fra.me.REG[0] = CALL_abstract_collection___Collection___iterator(fra.me.REG[0])(fra.me.REG[0]);
+  /* ./../lib/standard//collection//abstract_collection.nit:83 */
+  while(1) {
+    REGB0 = CALL_abstract_collection___Iterator___is_ok(fra.me.REG[0])(fra.me.REG[0]);
+    if (UNTAG_Bool(REGB0)) {
+      fra.me.REG[2] = CALL_abstract_collection___Iterator___item(fra.me.REG[0])(fra.me.REG[0]);
+      REGB0 = TAG_Bool(IS_EQUAL_NN(fra.me.REG[2],fra.me.REG[1]));
+      if (UNTAG_Bool(REGB0)) {
+      } else {
+        REGB1 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
+        if (UNTAG_Bool(REGB1)) {
+          REGB1 = TAG_Bool(false);
+          REGB0 = REGB1;
+        } else {
+          REGB1 = CALL_kernel___Object_____eqeq(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[1]);
+          REGB0 = REGB1;
+        }
+      }
+      if (UNTAG_Bool(REGB0)) {
+        REGB0 = TAG_Bool(true);
+        goto label1;
+      }
+    } else {
+      goto label2;
     }
-    continue_6: while(0);
-    ((abstract_collection___Iterator___next_t)CALL(variable1,COLOR_abstract_collection___Iterator___next))(variable1) /*Iterator::next*/;
-  }
-  break_6: while(0);
-  variable1 =  TAG_Bool(true);
-  goto return_label5;
-  return_label5: while(false);
-  tracehead = trace.prev;
-  return variable1;
-}
-val_t abstract_collection___NaiveCollection___count(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::NaiveCollection::count (bin/../lib/standard//abstract_collection.nit:93,2--97:11)"};
-  val_t variable0;
-  val_t variable1;
-  val_t variable2;
-    val_t variable3;
-    val_t variable4;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 =  param0;
-  variable1 =  TAG_Int(0);
-  variable2 = ((abstract_collection___Collection___iterator_t)CALL( self,COLOR_abstract_collection___Collection___iterator))( self) /*NaiveCollection::iterator*/;
-  while (true) { /*for*/
-    variable3 = ((abstract_collection___Iterator___is_ok_t)CALL(variable2,COLOR_abstract_collection___Iterator___is_ok))(variable2) /*Iterator::is_ok*/;
-    if (!UNTAG_Bool(variable3)) break; /*for*/
-    variable3 = ((abstract_collection___Iterator___item_t)CALL(variable2,COLOR_abstract_collection___Iterator___item))(variable2) /*Iterator::item*/;
-    variable4 = TAG_Bool(( variable3 /*i*/ ==  variable0 /*item*/) || (( variable3 /*i*/ != NIT_NULL) && ((((kernel___Object_____eqeq_t)CALL( variable3 /*i*/,COLOR_kernel___Object_____eqeq))==kernel___Object_____eqeq)?(IS_EQUAL_NN( variable3 /*i*/, variable0 /*item*/)):(UNTAG_Bool(((kernel___Object_____eqeq_t)CALL( variable3 /*i*/,COLOR_kernel___Object_____eqeq))( variable3 /*i*/,  variable0 /*item*/) /*Object::==*/)))));
-    if (UNTAG_Bool(variable4)) { /*if*/
-      variable1 = TAG_Int(UNTAG_Int(variable1)+UNTAG_Int( TAG_Int(1))) /*nb*/;
+    CALL_abstract_collection___Iterator___next(fra.me.REG[0])(fra.me.REG[0]);
+  }
+  label2: while(0);
+  REGB1 = TAG_Bool(false);
+  REGB0 = REGB1;
+  /* ./../lib/standard//collection//abstract_collection.nit:84 */
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+val_t abstract_collection___NaiveCollection___has_only(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 87;
+  fra.me.meth = LOCATE_abstract_collection___NaiveCollection___has_only;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 3;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  fra.me.REG[0] = CALL_abstract_collection___Collection___iterator(fra.me.REG[0])(fra.me.REG[0]);
+  /* ./../lib/standard//collection//abstract_collection.nit:89 */
+  while(1) {
+    REGB0 = CALL_abstract_collection___Iterator___is_ok(fra.me.REG[0])(fra.me.REG[0]);
+    if (UNTAG_Bool(REGB0)) {
+      fra.me.REG[2] = CALL_abstract_collection___Iterator___item(fra.me.REG[0])(fra.me.REG[0]);
+      REGB0 = TAG_Bool(IS_EQUAL_NN(fra.me.REG[2],fra.me.REG[1]));
+      if (UNTAG_Bool(REGB0)) {
+      } else {
+        REGB1 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
+        if (UNTAG_Bool(REGB1)) {
+          REGB1 = TAG_Bool(false);
+          REGB0 = REGB1;
+        } else {
+          REGB1 = CALL_kernel___Object_____eqeq(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[1]);
+          REGB0 = REGB1;
+        }
+      }
+      REGB0 = TAG_Bool(!UNTAG_Bool(REGB0));
+      if (UNTAG_Bool(REGB0)) {
+        REGB0 = TAG_Bool(false);
+        goto label1;
+      }
+    } else {
+      goto label2;
     }
-    continue_8: while(0);
-    ((abstract_collection___Iterator___next_t)CALL(variable2,COLOR_abstract_collection___Iterator___next))(variable2) /*Iterator::next*/;
-  }
-  break_8: while(0);
-  variable1 =  variable1 /*nb*/;
-  goto return_label7;
-  return_label7: while(false);
-  tracehead = trace.prev;
-  return variable1;
-}
-val_t abstract_collection___NaiveCollection___first(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::NaiveCollection::first (bin/../lib/standard//abstract_collection.nit:100,2--103:22)"};
-  val_t variable0;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 = ((abstract_collection___NaiveCollection___length_t)CALL( self,COLOR_abstract_collection___Collection___length))( self) /*NaiveCollection::length*/;
-  variable0 = TAG_Bool(UNTAG_Int(variable0)>UNTAG_Int( TAG_Int(0)));
-  if (!UNTAG_Bool(variable0)) { fprintf(stderr, "Assert failed: bin/../lib/standard//abstract_collection.nit:102,3--19\n"); nit_exit(1);}
-  variable0 = ((abstract_collection___Collection___iterator_t)CALL( self,COLOR_abstract_collection___Collection___iterator))( self) /*NaiveCollection::iterator*/;
-  variable0 = ((abstract_collection___Iterator___item_t)CALL(variable0,COLOR_abstract_collection___Iterator___item))(variable0) /*Iterator::item*/;
-  goto return_label9;
-  return_label9: while(false);
-  tracehead = trace.prev;
-  return variable0;
-}
-val_t abstract_collection___Iterator___item(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::Iterator::item (bin/../lib/standard//abstract_collection.nit:110,2--112:13)"};
-  trace.prev = tracehead; tracehead = &trace;
-  fprintf(stderr, "Deferred method item called (bin/../lib/standard//abstract_collection.nit:110,2)\n");
+    CALL_abstract_collection___Iterator___next(fra.me.REG[0])(fra.me.REG[0]);
+  }
+  label2: while(0);
+  REGB1 = TAG_Bool(true);
+  REGB0 = REGB1;
+  /* ./../lib/standard//collection//abstract_collection.nit:90 */
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+val_t abstract_collection___NaiveCollection___count(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t REGB2;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 93;
+  fra.me.meth = LOCATE_abstract_collection___NaiveCollection___count;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 3;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  REGB0 = TAG_Int(0);
+  fra.me.REG[0] = CALL_abstract_collection___Collection___iterator(fra.me.REG[0])(fra.me.REG[0]);
+  /* ./../lib/standard//collection//abstract_collection.nit:96 */
+  while(1) {
+    REGB1 = CALL_abstract_collection___Iterator___is_ok(fra.me.REG[0])(fra.me.REG[0]);
+    if (UNTAG_Bool(REGB1)) {
+      fra.me.REG[2] = CALL_abstract_collection___Iterator___item(fra.me.REG[0])(fra.me.REG[0]);
+      REGB1 = TAG_Bool(IS_EQUAL_NN(fra.me.REG[2],fra.me.REG[1]));
+      if (UNTAG_Bool(REGB1)) {
+      } else {
+        REGB2 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
+        if (UNTAG_Bool(REGB2)) {
+          REGB2 = TAG_Bool(false);
+          REGB1 = REGB2;
+        } else {
+          REGB2 = CALL_kernel___Object_____eqeq(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[1]);
+          REGB1 = REGB2;
+        }
+      }
+      if (UNTAG_Bool(REGB1)) {
+        REGB1 = TAG_Int(1);
+        REGB1 = TAG_Int(UNTAG_Int(REGB0)+UNTAG_Int(REGB1));
+        REGB0 = REGB1;
+      /* ./../lib/standard//collection//abstract_collection.nit:96 */
+      }
+    } else {
+      goto label1;
+    }
+    CALL_abstract_collection___Iterator___next(fra.me.REG[0])(fra.me.REG[0]);
+  }
+  label1: while(0);
+  /* ./../lib/standard//collection//abstract_collection.nit:97 */
+  goto label2;
+  label2: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+val_t abstract_collection___NaiveCollection___first(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 100;
+  fra.me.meth = LOCATE_abstract_collection___NaiveCollection___first;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  REGB0 = CALL_abstract_collection___Collection___length(fra.me.REG[0])(fra.me.REG[0]);
+  REGB1 = TAG_Int(0);
+  REGB1 = TAG_Bool(UNTAG_Int(REGB0)>UNTAG_Int(REGB1));
+  /* ./../lib/standard//collection//abstract_collection.nit:102 */
+  if (UNTAG_Bool(REGB1)) {
+  } else {
+    fprintf(stderr, "Assert failed");
+    fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 102);
+    nit_exit(1);
+  }
+  fra.me.REG[0] = CALL_abstract_collection___Collection___iterator(fra.me.REG[0])(fra.me.REG[0]);
+  fra.me.REG[0] = CALL_abstract_collection___Iterator___item(fra.me.REG[0])(fra.me.REG[0]);
+  /* ./../lib/standard//collection//abstract_collection.nit:103 */
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+val_t abstract_collection___Iterator___item(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 110;
+  fra.me.meth = LOCATE_abstract_collection___Iterator___item;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 0;
+  /* ./../lib/standard//collection//abstract_collection.nit:110 */
+  fprintf(stderr, "Deferred method called");
+  fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 110);
   nit_exit(1);
-  tracehead = trace.prev;
+  stack_frame_head = fra.me.prev;
   return NIT_NULL;
 }
-void abstract_collection___Iterator___next(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::Iterator::next (bin/../lib/standard//abstract_collection.nit:114,2--116:10)"};
-  trace.prev = tracehead; tracehead = &trace;
-  fprintf(stderr, "Deferred method next called (bin/../lib/standard//abstract_collection.nit:114,2)\n");
+void abstract_collection___Iterator___next(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 114;
+  fra.me.meth = LOCATE_abstract_collection___Iterator___next;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 0;
+  /* ./../lib/standard//collection//abstract_collection.nit:114 */
+  fprintf(stderr, "Deferred method called");
+  fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 114);
   nit_exit(1);
-  tracehead = trace.prev;
+  stack_frame_head = fra.me.prev;
   return;
 }
-val_t abstract_collection___Iterator___is_ok(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::Iterator::is_ok (bin/../lib/standard//abstract_collection.nit:118,2--119:17)"};
-  trace.prev = tracehead; tracehead = &trace;
-  fprintf(stderr, "Deferred method is_ok called (bin/../lib/standard//abstract_collection.nit:118,2)\n");
+val_t abstract_collection___Iterator___is_ok(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 118;
+  fra.me.meth = LOCATE_abstract_collection___Iterator___is_ok;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 0;
+  /* ./../lib/standard//collection//abstract_collection.nit:118 */
+  fprintf(stderr, "Deferred method called");
+  fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 118);
   nit_exit(1);
-  tracehead = trace.prev;
+  stack_frame_head = fra.me.prev;
   return NIT_NULL;
 }
-val_t abstract_collection___Container___first(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::Container::first (bin/../lib/standard//abstract_collection.nit:126,2--33)"};
-  val_t variable0;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 = ATTR_abstract_collection___Container____item( self) /*Container::_item*/;
-  goto return_label10;
-  return_label10: while(false);
-  tracehead = trace.prev;
-  return variable0;
-}
-val_t abstract_collection___Container___is_empty(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::Container::is_empty (bin/../lib/standard//abstract_collection.nit:128,2--36)"};
-  val_t variable0;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 =  TAG_Bool(false);
-  goto return_label11;
-  return_label11: while(false);
-  tracehead = trace.prev;
-  return variable0;
-}
-val_t abstract_collection___Container___length(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::Container::length (bin/../lib/standard//abstract_collection.nit:130,2--30)"};
-  val_t variable0;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 =  TAG_Int(1);
-  goto return_label12;
-  return_label12: while(false);
-  tracehead = trace.prev;
-  return variable0;
-}
-val_t abstract_collection___Container___has(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::Container::has (bin/../lib/standard//abstract_collection.nit:132,2--51)"};
-  val_t variable0;
-  val_t variable1;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 =  param0;
-  variable1 = ATTR_abstract_collection___Container____item( self) /*Container::_item*/;
-  variable1 = TAG_Bool((variable1 ==  variable0 /*an_item*/) || ((variable1 != NIT_NULL) && ((((kernel___Object_____eqeq_t)CALL(variable1,COLOR_kernel___Object_____eqeq))==kernel___Object_____eqeq)?(IS_EQUAL_NN(variable1, variable0 /*an_item*/)):(UNTAG_Bool(((kernel___Object_____eqeq_t)CALL(variable1,COLOR_kernel___Object_____eqeq))(variable1,  variable0 /*an_item*/) /*Object::==*/)))));
-  goto return_label13;
-  return_label13: while(false);
-  tracehead = trace.prev;
-  return variable1;
-}
-val_t abstract_collection___Container___has_only(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::Container::has_only (bin/../lib/standard//abstract_collection.nit:134,2--56)"};
-  val_t variable0;
-  val_t variable1;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 =  param0;
-  variable1 = ATTR_abstract_collection___Container____item( self) /*Container::_item*/;
-  variable1 = TAG_Bool((variable1 ==  variable0 /*an_item*/) || ((variable1 != NIT_NULL) && ((((kernel___Object_____eqeq_t)CALL(variable1,COLOR_kernel___Object_____eqeq))==kernel___Object_____eqeq)?(IS_EQUAL_NN(variable1, variable0 /*an_item*/)):(UNTAG_Bool(((kernel___Object_____eqeq_t)CALL(variable1,COLOR_kernel___Object_____eqeq))(variable1,  variable0 /*an_item*/) /*Object::==*/)))));
-  goto return_label14;
-  return_label14: while(false);
-  tracehead = trace.prev;
-  return variable1;
-}
-val_t abstract_collection___Container___count(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::Container::count (bin/../lib/standard//abstract_collection.nit:136,2--141:11)"};
-  val_t variable0;
-  val_t variable1;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 =  param0;
-  variable1 = ATTR_abstract_collection___Container____item( self) /*Container::_item*/;
-  variable1 = TAG_Bool((variable1 ==  variable0 /*an_item*/) || ((variable1 != NIT_NULL) && ((((kernel___Object_____eqeq_t)CALL(variable1,COLOR_kernel___Object_____eqeq))==kernel___Object_____eqeq)?(IS_EQUAL_NN(variable1, variable0 /*an_item*/)):(UNTAG_Bool(((kernel___Object_____eqeq_t)CALL(variable1,COLOR_kernel___Object_____eqeq))(variable1,  variable0 /*an_item*/) /*Object::==*/)))));
-  if (UNTAG_Bool(variable1)) { /*if*/
-    variable1 =  TAG_Int(1);
-    goto return_label15;
-  } else { /*if*/
-    variable1 =  TAG_Int(0);
-    goto return_label15;
-  }
-  return_label15: while(false);
-  tracehead = trace.prev;
-  return variable1;
-}
-val_t abstract_collection___Container___iterator(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::Container::iterator (bin/../lib/standard//abstract_collection.nit:145,2--60)"};
-  val_t variable0;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 = NEW_abstract_collection___ContainerIterator___init( self); /*new ContainerIterator[E]*/
-  goto return_label16;
-  return_label16: while(false);
-  tracehead = trace.prev;
-  return variable0;
-}
-void abstract_collection___Container___init(val_t  self, val_t  param0, int* init_table) {
-  struct trace_t trace = {NULL, "abstract_collection::Container::init (bin/../lib/standard//abstract_collection.nit:147,2--148:24)"};
-  val_t variable0;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 =  param0;
-  if (init_table[VAL2OBJ( self)->vft[INIT_TABLE_POS_Container].i]) return;
-  ATTR_abstract_collection___Container____item( self) /*Container::_item*/ =  variable0 /*e*/;
-  init_table[VAL2OBJ( self)->vft[INIT_TABLE_POS_Container].i] = 1;
-  tracehead = trace.prev;
+val_t abstract_collection___Container___iterator(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 145;
+  fra.me.meth = LOCATE_abstract_collection___Container___iterator;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[0] = NEW_ContainerIterator_abstract_collection___ContainerIterator___init(fra.me.REG[0]);
+  /* ./../lib/standard//collection//abstract_collection.nit:145 */
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+val_t abstract_collection___Container___is_empty(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 128;
+  fra.me.meth = LOCATE_abstract_collection___Container___is_empty;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  REGB0 = TAG_Bool(false);
+  /* ./../lib/standard//collection//abstract_collection.nit:128 */
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+val_t abstract_collection___Container___length(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 130;
+  fra.me.meth = LOCATE_abstract_collection___Container___length;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  REGB0 = TAG_Int(1);
+  /* ./../lib/standard//collection//abstract_collection.nit:130 */
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+val_t abstract_collection___Container___has(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 132;
+  fra.me.meth = LOCATE_abstract_collection___Container___has;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  fra.me.REG[0] = ATTR_abstract_collection___Container____item(fra.me.REG[0]);
+  REGB0 = TAG_Bool(IS_EQUAL_NN(fra.me.REG[0],fra.me.REG[1]));
+  /* ./../lib/standard//collection//abstract_collection.nit:132 */
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    REGB1 = TAG_Bool(fra.me.REG[0]==NIT_NULL);
+    if (UNTAG_Bool(REGB1)) {
+      REGB1 = TAG_Bool(false);
+      REGB0 = REGB1;
+    } else {
+      REGB1 = CALL_kernel___Object_____eqeq(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+      REGB0 = REGB1;
+    }
+  }
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+val_t abstract_collection___Container___has_only(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 134;
+  fra.me.meth = LOCATE_abstract_collection___Container___has_only;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  fra.me.REG[0] = ATTR_abstract_collection___Container____item(fra.me.REG[0]);
+  REGB0 = TAG_Bool(IS_EQUAL_NN(fra.me.REG[0],fra.me.REG[1]));
+  /* ./../lib/standard//collection//abstract_collection.nit:134 */
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    REGB1 = TAG_Bool(fra.me.REG[0]==NIT_NULL);
+    if (UNTAG_Bool(REGB1)) {
+      REGB1 = TAG_Bool(false);
+      REGB0 = REGB1;
+    } else {
+      REGB1 = CALL_kernel___Object_____eqeq(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+      REGB0 = REGB1;
+    }
+  }
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+val_t abstract_collection___Container___count(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 136;
+  fra.me.meth = LOCATE_abstract_collection___Container___count;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  fra.me.REG[0] = ATTR_abstract_collection___Container____item(fra.me.REG[0]);
+  REGB0 = TAG_Bool(IS_EQUAL_NN(fra.me.REG[0],fra.me.REG[1]));
+  /* ./../lib/standard//collection//abstract_collection.nit:138 */
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    REGB1 = TAG_Bool(fra.me.REG[0]==NIT_NULL);
+    if (UNTAG_Bool(REGB1)) {
+      REGB1 = TAG_Bool(false);
+      REGB0 = REGB1;
+    } else {
+      REGB1 = CALL_kernel___Object_____eqeq(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+      REGB0 = REGB1;
+    }
+  }
+  if (UNTAG_Bool(REGB0)) {
+    REGB0 = TAG_Int(1);
+    /* ./../lib/standard//collection//abstract_collection.nit:139 */
+    goto label1;
+  } else {
+    REGB1 = TAG_Int(0);
+    REGB0 = REGB1;
+    /* ./../lib/standard//collection//abstract_collection.nit:141 */
+    goto label1;
+  }
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+val_t abstract_collection___Container___first(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 126;
+  fra.me.meth = LOCATE_abstract_collection___Container___first;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[0] = ATTR_abstract_collection___Container____item(fra.me.REG[0]);
+  /* ./../lib/standard//collection//abstract_collection.nit:126 */
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+void abstract_collection___Container___init(val_t p0, val_t p1, int* init_table){
+  int itpos0 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_Container].i;
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t tmp;
+  if (init_table[itpos0]) return;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 147;
+  fra.me.meth = LOCATE_abstract_collection___Container___init;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ./../lib/standard//collection//abstract_collection.nit:148 */
+  ATTR_abstract_collection___Container____item(fra.me.REG[0]) = fra.me.REG[1];
+  stack_frame_head = fra.me.prev;
+  init_table[itpos0] = 1;
   return;
 }
-val_t abstract_collection___Container___item(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::Container::item (bin/../lib/standard//abstract_collection.nit:150,2--151:32)"};
-  trace.prev = tracehead; tracehead = &trace;
-  tracehead = trace.prev;
-  return ATTR_abstract_collection___Container____item( self) /*Container::_item*/;
-}
-void abstract_collection___Container___item__eq(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::Container::item= (bin/../lib/standard//abstract_collection.nit:150,2--151:32)"};
-  trace.prev = tracehead; tracehead = &trace;
-  ATTR_abstract_collection___Container____item( self) /*Container::_item*/ =  param0;
-  tracehead = trace.prev;
+val_t abstract_collection___Container___item(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 150;
+  fra.me.meth = LOCATE_abstract_collection___Container___item;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[0] = ATTR_abstract_collection___Container____item(fra.me.REG[0]);
+  /* ./../lib/standard//collection//abstract_collection.nit:150 */
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+void abstract_collection___Container___item__eq(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 150;
+  fra.me.meth = LOCATE_abstract_collection___Container___item__eq;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ./../lib/standard//collection//abstract_collection.nit:150 */
+  ATTR_abstract_collection___Container____item(fra.me.REG[0]) = fra.me.REG[1];
+  stack_frame_head = fra.me.prev;
   return;
 }
-val_t abstract_collection___ContainerIterator___item(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::ContainerIterator::item (bin/../lib/standard//abstract_collection.nit:157,2--42)"};
-  val_t variable0;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 = ATTR_abstract_collection___ContainerIterator____container( self) /*ContainerIterator::_container*/;
-  variable0 = ((abstract_collection___Container___item_t)CALL(variable0,COLOR_abstract_collection___Container___item))(variable0) /*Container::item*/;
-  goto return_label18;
-  return_label18: while(false);
-  tracehead = trace.prev;
-  return variable0;
-}
-void abstract_collection___ContainerIterator___next(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::ContainerIterator::next (bin/../lib/standard//abstract_collection.nit:159,2--34)"};
-  trace.prev = tracehead; tracehead = &trace;
-  ATTR_abstract_collection___ContainerIterator____is_ok( self) /*ContainerIterator::_is_ok*/ =  TAG_Bool(false);
-  tracehead = trace.prev;
+val_t abstract_collection___ContainerIterator___item(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 157;
+  fra.me.meth = LOCATE_abstract_collection___ContainerIterator___item;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  REGB0 = TAG_Bool(ATTR_abstract_collection___ContainerIterator____container(fra.me.REG[0])!=NIT_NULL);
+  /* ./../lib/standard//collection//abstract_collection.nit:157 */
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    fprintf(stderr, "Uninitialized attribute %s", "_container");
+    fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 157);
+    nit_exit(1);
+  }
+  fra.me.REG[0] = ATTR_abstract_collection___ContainerIterator____container(fra.me.REG[0]);
+  fra.me.REG[0] = CALL_abstract_collection___Container___item(fra.me.REG[0])(fra.me.REG[0]);
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+void abstract_collection___ContainerIterator___next(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 159;
+  fra.me.meth = LOCATE_abstract_collection___ContainerIterator___next;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  REGB0 = TAG_Bool(false);
+  /* ./../lib/standard//collection//abstract_collection.nit:159 */
+  ATTR_abstract_collection___ContainerIterator____is_ok(fra.me.REG[0]) = REGB0;
+  stack_frame_head = fra.me.prev;
   return;
 }
-void abstract_collection___ContainerIterator___init(val_t  self, val_t  param0, int* init_table) {
-  struct trace_t trace = {NULL, "abstract_collection::ContainerIterator::init (bin/../lib/standard//abstract_collection.nit:161,2--40)"};
-  val_t variable0;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 =  param0;
-  if (init_table[VAL2OBJ( self)->vft[INIT_TABLE_POS_ContainerIterator].i]) return;
-  ATTR_abstract_collection___ContainerIterator____container( self) /*ContainerIterator::_container*/ =  variable0 /*c*/;
-  init_table[VAL2OBJ( self)->vft[INIT_TABLE_POS_ContainerIterator].i] = 1;
-  tracehead = trace.prev;
+val_t abstract_collection___ContainerIterator___is_ok(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 163;
+  fra.me.meth = LOCATE_abstract_collection___ContainerIterator___is_ok;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  REGB0 = TAG_Bool(ATTR_abstract_collection___ContainerIterator____is_ok(fra.me.REG[0])!=NIT_NULL);
+  /* ./../lib/standard//collection//abstract_collection.nit:163 */
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    fprintf(stderr, "Uninitialized attribute %s", "_is_ok");
+    fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 163);
+    nit_exit(1);
+  }
+  REGB0 = ATTR_abstract_collection___ContainerIterator____is_ok(fra.me.REG[0]);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+void abstract_collection___ContainerIterator___init(val_t p0, val_t p1, int* init_table){
+  int itpos1 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_ContainerIterator].i;
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t tmp;
+  if (init_table[itpos1]) return;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 161;
+  fra.me.meth = LOCATE_abstract_collection___ContainerIterator___init;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ./../lib/standard//collection//abstract_collection.nit:161 */
+  ATTR_abstract_collection___ContainerIterator____container(fra.me.REG[0]) = fra.me.REG[1];
+  stack_frame_head = fra.me.prev;
+  init_table[itpos1] = 1;
   return;
 }
-val_t abstract_collection___ContainerIterator___is_ok(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::ContainerIterator::is_ok (bin/../lib/standard//abstract_collection.nit:163,2--40)"};
-  trace.prev = tracehead; tracehead = &trace;
-  tracehead = trace.prev;
-  return ATTR_abstract_collection___ContainerIterator____is_ok( self) /*ContainerIterator::_is_ok*/;
-}
-void abstract_collection___RemovableCollection___clear(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::RemovableCollection::clear (bin/../lib/standard//abstract_collection.nit:171,2--172:11)"};
-  trace.prev = tracehead; tracehead = &trace;
-  fprintf(stderr, "Deferred method clear called (bin/../lib/standard//abstract_collection.nit:171,2)\n");
+void abstract_collection___RemovableCollection___clear(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 171;
+  fra.me.meth = LOCATE_abstract_collection___RemovableCollection___clear;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 0;
+  /* ./../lib/standard//collection//abstract_collection.nit:171 */
+  fprintf(stderr, "Deferred method called");
+  fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 171);
   nit_exit(1);
-  tracehead = trace.prev;
+  stack_frame_head = fra.me.prev;
   return;
 }
-void abstract_collection___RemovableCollection___remove(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::RemovableCollection::remove (bin/../lib/standard//abstract_collection.nit:174,2--175:20)"};
-  trace.prev = tracehead; tracehead = &trace;
-  fprintf(stderr, "Deferred method remove called (bin/../lib/standard//abstract_collection.nit:174,2)\n");
+void abstract_collection___RemovableCollection___remove(val_t p0, val_t p1){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 174;
+  fra.me.meth = LOCATE_abstract_collection___RemovableCollection___remove;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 0;
+  /* ./../lib/standard//collection//abstract_collection.nit:174 */
+  fprintf(stderr, "Deferred method called");
+  fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 174);
   nit_exit(1);
-  tracehead = trace.prev;
+  stack_frame_head = fra.me.prev;
   return;
 }
-void abstract_collection___RemovableCollection___remove_all(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::RemovableCollection::remove_all (bin/../lib/standard//abstract_collection.nit:177,2--178:59)"};
-  val_t variable0;
-    val_t variable1;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 =  param0;
-  while (true) { /*while*/
-    variable1 = ((abstract_collection___Collection___has_t)CALL( self,COLOR_abstract_collection___Collection___has))( self,  variable0 /*item*/) /*RemovableCollection::has*/;
-    if (!UNTAG_Bool(variable1)) break; /* while*/
-    ((abstract_collection___RemovableCollection___remove_t)CALL( self,COLOR_abstract_collection___RemovableCollection___remove))( self,  variable0 /*item*/) /*RemovableCollection::remove*/;
-    continue_22: while(0);
-  }
-  break_22: while(0);
-  tracehead = trace.prev;
+void abstract_collection___RemovableCollection___remove_all(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 177;
+  fra.me.meth = LOCATE_abstract_collection___RemovableCollection___remove_all;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ./../lib/standard//collection//abstract_collection.nit:178 */
+  while(1) {
+    REGB0 = CALL_abstract_collection___Collection___has(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+    if (UNTAG_Bool(REGB0)) {
+      CALL_abstract_collection___RemovableCollection___remove(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+    } else {
+      goto label1;
+    }
+  }
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
   return;
 }
-void abstract_collection___SimpleCollection___add(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::SimpleCollection::add (bin/../lib/standard//abstract_collection.nit:184,2--186:17)"};
-  trace.prev = tracehead; tracehead = &trace;
-  fprintf(stderr, "Deferred method add called (bin/../lib/standard//abstract_collection.nit:184,2)\n");
+void abstract_collection___SimpleCollection___add(val_t p0, val_t p1){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 184;
+  fra.me.meth = LOCATE_abstract_collection___SimpleCollection___add;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 0;
+  /* ./../lib/standard//collection//abstract_collection.nit:184 */
+  fprintf(stderr, "Deferred method called");
+  fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 184);
   nit_exit(1);
-  tracehead = trace.prev;
+  stack_frame_head = fra.me.prev;
   return;
 }
-void abstract_collection___SimpleCollection___add_all(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::SimpleCollection::add_all (bin/../lib/standard//abstract_collection.nit:188,2--189:81)"};
-  val_t variable0;
-  val_t variable1;
-      val_t variable2;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 =  param0;
-  variable1 = TAG_Bool(!UNTAG_Bool(TAG_Bool(( variable0 /*coll*/ ==  NIT_NULL /*null*/) || (( variable0 /*coll*/ != NIT_NULL) && ((((kernel___Object_____eqeq_t)CALL( variable0 /*coll*/,COLOR_kernel___Object_____eqeq))==kernel___Object_____eqeq)?(IS_EQUAL_NN( variable0 /*coll*/, NIT_NULL /*null*/)):(UNTAG_Bool(((kernel___Object_____eqeq_t)CALL( variable0 /*coll*/,COLOR_kernel___Object_____eqeq))( variable0 /*coll*/,  NIT_NULL /*null*/) /*Collection::==*/)))))));
-  if (UNTAG_Bool(variable1)) { /*if*/
-    variable1 = ((abstract_collection___Collection___iterator_t)CALL( variable0 /*coll*/,COLOR_abstract_collection___Collection___iterator))( variable0 /*coll*/) /*Collection::iterator*/;
-    while (true) { /*for*/
-      variable2 = ((abstract_collection___Iterator___is_ok_t)CALL(variable1,COLOR_abstract_collection___Iterator___is_ok))(variable1) /*Iterator::is_ok*/;
-      if (!UNTAG_Bool(variable2)) break; /*for*/
-      variable2 = ((abstract_collection___Iterator___item_t)CALL(variable1,COLOR_abstract_collection___Iterator___item))(variable1) /*Iterator::item*/;
-      ((abstract_collection___SimpleCollection___add_t)CALL( self,COLOR_abstract_collection___SimpleCollection___add))( self,  variable2 /*i*/) /*SimpleCollection::add*/;
-      continue_24: while(0);
-      ((abstract_collection___Iterator___next_t)CALL(variable1,COLOR_abstract_collection___Iterator___next))(variable1) /*Iterator::next*/;
+void abstract_collection___SimpleCollection___add_all(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 188;
+  fra.me.meth = LOCATE_abstract_collection___SimpleCollection___add_all;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 3;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  fra.me.REG[1] = CALL_abstract_collection___Collection___iterator(fra.me.REG[1])(fra.me.REG[1]);
+  /* ./../lib/standard//collection//abstract_collection.nit:189 */
+  while(1) {
+    REGB0 = CALL_abstract_collection___Iterator___is_ok(fra.me.REG[1])(fra.me.REG[1]);
+    if (UNTAG_Bool(REGB0)) {
+      fra.me.REG[2] = CALL_abstract_collection___Iterator___item(fra.me.REG[1])(fra.me.REG[1]);
+      CALL_abstract_collection___SimpleCollection___add(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[2]);
+    } else {
+      goto label1;
     }
-    break_24: while(0);
+    CALL_abstract_collection___Iterator___next(fra.me.REG[1])(fra.me.REG[1]);
   }
-  tracehead = trace.prev;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
   return;
 }
-val_t abstract_collection___Set___has_only(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::Set::has_only (bin/../lib/standard//abstract_collection.nit:204,2--212:15)"};
-  val_t variable0;
-  val_t variable1;
-  val_t variable2;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 =  param0;
-  variable2 = ((abstract_collection___Collection___length_t)CALL( self,COLOR_abstract_collection___Collection___length))( self) /*Set::length*/;
-  variable1 = variable2;
-  variable2 = TAG_Bool(( variable1 /*l*/)==( TAG_Int(1)));
-  if (UNTAG_Bool(variable2)) { /*if*/
-    variable2 = ((abstract_collection___Collection___has_t)CALL( self,COLOR_abstract_collection___Collection___has))( self,  variable0 /*item*/) /*Set::has*/;
-    variable1 = variable2;
-    goto return_label25;
-  } else { /*if*/
-    variable2 = TAG_Bool(( variable1 /*l*/)==( TAG_Int(0)));
-    if (UNTAG_Bool(variable2)) { /*if*/
-      variable1 =  TAG_Bool(true);
-      goto return_label25;
-    } else { /*if*/
-      variable1 =  TAG_Bool(false);
-      goto return_label25;
+val_t abstract_collection___Set___has_only(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t REGB2;
+  val_t REGB3;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 204;
+  fra.me.meth = LOCATE_abstract_collection___Set___has_only;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  REGB0 = CALL_abstract_collection___Collection___length(fra.me.REG[0])(fra.me.REG[0]);
+  REGB1 = TAG_Int(1);
+  REGB2 = TAG_Bool(IS_EQUAL_OO(REGB0,REGB1));
+  /* ./../lib/standard//collection//abstract_collection.nit:207 */
+  if (UNTAG_Bool(REGB2)) {
+  } else {
+    REGB1 = TAG_Bool((REGB0)==(REGB1));
+    REGB2 = REGB1;
+  /* ./../lib/standard//collection//abstract_collection.nit:207 */
+  }
+  if (UNTAG_Bool(REGB2)) {
+    REGB2 = CALL_abstract_collection___Collection___has(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+    /* ./../lib/standard//collection//abstract_collection.nit:208 */
+    goto label1;
+  } else {
+    REGB1 = TAG_Int(0);
+    REGB3 = TAG_Bool(IS_EQUAL_OO(REGB0,REGB1));
+    /* ./../lib/standard//collection//abstract_collection.nit:209 */
+    if (UNTAG_Bool(REGB3)) {
+    } else {
+      REGB1 = TAG_Bool((REGB0)==(REGB1));
+      REGB3 = REGB1;
+    /* ./../lib/standard//collection//abstract_collection.nit:209 */
+    }
+    if (UNTAG_Bool(REGB3)) {
+      REGB3 = TAG_Bool(true);
+      REGB2 = REGB3;
+      /* ./../lib/standard//collection//abstract_collection.nit:210 */
+      goto label1;
+    } else {
+      REGB3 = TAG_Bool(false);
+      REGB2 = REGB3;
+      /* ./../lib/standard//collection//abstract_collection.nit:212 */
+      goto label1;
     }
   }
-  return_label25: while(false);
-  tracehead = trace.prev;
-  return variable1;
-}
-val_t abstract_collection___Set___count(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::Set::count (bin/../lib/standard//abstract_collection.nit:216,2--222:11)"};
-  val_t variable0;
-  val_t variable1;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 =  param0;
-  variable1 = ((abstract_collection___Collection___has_t)CALL( self,COLOR_abstract_collection___Collection___has))( self,  variable0 /*item*/) /*Set::has*/;
-  if (UNTAG_Bool(variable1)) { /*if*/
-    variable1 =  TAG_Int(1);
-    goto return_label26;
-  } else { /*if*/
-    variable1 =  TAG_Int(0);
-    goto return_label26;
-  }
-  return_label26: while(false);
-  tracehead = trace.prev;
-  return variable1;
-}
-void abstract_collection___Set___remove_all(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::Set::remove_all (bin/../lib/standard//abstract_collection.nit:226,2--227:43)"};
-  val_t variable0;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 =  param0;
-  ((abstract_collection___RemovableCollection___remove_t)CALL( self,COLOR_abstract_collection___RemovableCollection___remove))( self,  variable0 /*item*/) /*Set::remove*/;
-  tracehead = trace.prev;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB2;
+}
+val_t abstract_collection___Set___count(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 216;
+  fra.me.meth = LOCATE_abstract_collection___Set___count;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  REGB0 = CALL_abstract_collection___Collection___has(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+  /* ./../lib/standard//collection//abstract_collection.nit:219 */
+  if (UNTAG_Bool(REGB0)) {
+    REGB0 = TAG_Int(1);
+    /* ./../lib/standard//collection//abstract_collection.nit:220 */
+    goto label1;
+  } else {
+    REGB1 = TAG_Int(0);
+    REGB0 = REGB1;
+    /* ./../lib/standard//collection//abstract_collection.nit:222 */
+    goto label1;
+  }
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+void abstract_collection___Set___remove_all(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 226;
+  fra.me.meth = LOCATE_abstract_collection___Set___remove_all;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ./../lib/standard//collection//abstract_collection.nit:227 */
+  CALL_abstract_collection___RemovableCollection___remove(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+  stack_frame_head = fra.me.prev;
   return;
 }
-val_t abstract_collection___Map_____bra(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::Map::[] (bin/../lib/standard//abstract_collection.nit:244,2--245:19)"};
-  trace.prev = tracehead; tracehead = &trace;
-  fprintf(stderr, "Deferred method [] called (bin/../lib/standard//abstract_collection.nit:244,2)\n");
+val_t abstract_collection___MapRead___iterator(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 238;
+  fra.me.meth = LOCATE_abstract_collection___MapRead___iterator;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 0;
+  /* ./../lib/standard//collection//abstract_collection.nit:238 */
+  fprintf(stderr, "Deferred method called");
+  fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 238);
   nit_exit(1);
-  tracehead = trace.prev;
+  stack_frame_head = fra.me.prev;
   return NIT_NULL;
 }
-void abstract_collection___Map_____braeq(val_t  self, val_t  param0, val_t  param1) {
-  struct trace_t trace = {NULL, "abstract_collection::Map::[]= (bin/../lib/standard//abstract_collection.nit:247,2--248:25)"};
-  trace.prev = tracehead; tracehead = &trace;
-  fprintf(stderr, "Deferred method []= called (bin/../lib/standard//abstract_collection.nit:247,2)\n");
+val_t abstract_collection___MapRead_____bra(val_t p0, val_t p1){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 232;
+  fra.me.meth = LOCATE_abstract_collection___MapRead_____bra;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 0;
+  /* ./../lib/standard//collection//abstract_collection.nit:232 */
+  fprintf(stderr, "Deferred method called");
+  fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 232);
   nit_exit(1);
-  tracehead = trace.prev;
-  return;
+  stack_frame_head = fra.me.prev;
+  return NIT_NULL;
 }
-val_t abstract_collection___Map___has_key(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::Map::has_key (bin/../lib/standard//abstract_collection.nit:250,2--251:27)"};
-  trace.prev = tracehead; tracehead = &trace;
-  fprintf(stderr, "Deferred method has_key called (bin/../lib/standard//abstract_collection.nit:250,2)\n");
+val_t abstract_collection___MapRead___has_key(val_t p0, val_t p1){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 235;
+  fra.me.meth = LOCATE_abstract_collection___MapRead___has_key;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 0;
+  /* ./../lib/standard//collection//abstract_collection.nit:235 */
+  fprintf(stderr, "Deferred method called");
+  fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 235);
   nit_exit(1);
-  tracehead = trace.prev;
+  stack_frame_head = fra.me.prev;
   return NIT_NULL;
 }
-void abstract_collection___Map___remove_at(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::Map::remove_at (bin/../lib/standard//abstract_collection.nit:253,2--254:22)"};
-  trace.prev = tracehead; tracehead = &trace;
-  fprintf(stderr, "Deferred method remove_at called (bin/../lib/standard//abstract_collection.nit:253,2)\n");
+void abstract_collection___Map_____braeq(val_t p0, val_t p1, val_t p2){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 256;
+  fra.me.meth = LOCATE_abstract_collection___Map_____braeq;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 0;
+  /* ./../lib/standard//collection//abstract_collection.nit:256 */
+  fprintf(stderr, "Deferred method called");
+  fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 256);
   nit_exit(1);
-  tracehead = trace.prev;
+  stack_frame_head = fra.me.prev;
   return;
 }
-void abstract_collection___Map___recover_with(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::Map::recover_with (bin/../lib/standard//abstract_collection.nit:256,2--263:9)"};
-  val_t variable0;
-  val_t variable1;
-  val_t variable2;
-    val_t variable3;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 =  param0;
-  variable2 = ((abstract_collection___Map___iterator_t)CALL( variable0 /*map*/,COLOR_abstract_collection___Collection___iterator))( variable0 /*map*/) /*Map::iterator*/;
-  variable1 = variable2;
-  while (true) { /*while*/
-    variable2 = ((abstract_collection___Iterator___is_ok_t)CALL( variable1 /*i*/,COLOR_abstract_collection___Iterator___is_ok))( variable1 /*i*/) /*MapIterator::is_ok*/;
-    if (!UNTAG_Bool(variable2)) break; /* while*/
-    variable2 = ((abstract_collection___MapIterator___key_t)CALL( variable1 /*i*/,COLOR_abstract_collection___MapIterator___key))( variable1 /*i*/) /*MapIterator::key*/;
-    variable3 = ((abstract_collection___Iterator___item_t)CALL( variable1 /*i*/,COLOR_abstract_collection___Iterator___item))( variable1 /*i*/) /*MapIterator::item*/;
-    ((abstract_collection___Map_____braeq_t)CALL( self,COLOR_abstract_collection___Map_____braeq))( self, variable2, variable3) /*Map::[]=*/;
-    ((abstract_collection___Iterator___next_t)CALL( variable1 /*i*/,COLOR_abstract_collection___Iterator___next))( variable1 /*i*/) /*MapIterator::next*/;
-    continue_29: while(0);
-  }
-  break_29: while(0);
-  tracehead = trace.prev;
+void abstract_collection___Map___remove_at(val_t p0, val_t p1){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 259;
+  fra.me.meth = LOCATE_abstract_collection___Map___remove_at;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 0;
+  /* ./../lib/standard//collection//abstract_collection.nit:259 */
+  fprintf(stderr, "Deferred method called");
+  fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 259);
+  nit_exit(1);
+  stack_frame_head = fra.me.prev;
   return;
 }
-val_t abstract_collection___Map___iterator(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::Map::iterator (bin/../lib/standard//abstract_collection.nit:267,2--38)"};
-  trace.prev = tracehead; tracehead = &trace;
-  fprintf(stderr, "Deferred method iterator called (bin/../lib/standard//abstract_collection.nit:267,2)\n");
-  nit_exit(1);
-  tracehead = trace.prev;
-  return NIT_NULL;
+void abstract_collection___Map___recover_with(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[3];} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 262;
+  fra.me.meth = LOCATE_abstract_collection___Map___recover_with;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 4;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[3] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  fra.me.REG[1] = CALL_abstract_collection___Collection___iterator(fra.me.REG[1])(fra.me.REG[1]);
+  /* ./../lib/standard//collection//abstract_collection.nit:267 */
+  while(1) {
+    REGB0 = CALL_abstract_collection___Iterator___is_ok(fra.me.REG[1])(fra.me.REG[1]);
+    if (UNTAG_Bool(REGB0)) {
+      fra.me.REG[2] = CALL_abstract_collection___MapIterator___key(fra.me.REG[1])(fra.me.REG[1]);
+      fra.me.REG[3] = CALL_abstract_collection___Iterator___item(fra.me.REG[1])(fra.me.REG[1]);
+      /* ./../lib/standard//collection//abstract_collection.nit:268 */
+      CALL_abstract_collection___Map_____braeq(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[2], fra.me.REG[3]);
+      /* ./../lib/standard//collection//abstract_collection.nit:269 */
+      CALL_abstract_collection___Iterator___next(fra.me.REG[1])(fra.me.REG[1]);
+    } else {
+      /* ./../lib/standard//collection//abstract_collection.nit:267 */
+      goto label1;
+    }
+  }
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return;
 }
-val_t abstract_collection___MapIterator___key(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::MapIterator::key (bin/../lib/standard//abstract_collection.nit:273,2--274:12)"};
-  trace.prev = tracehead; tracehead = &trace;
-  fprintf(stderr, "Deferred method key called (bin/../lib/standard//abstract_collection.nit:273,2)\n");
+val_t abstract_collection___MapIterator___key(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 277;
+  fra.me.meth = LOCATE_abstract_collection___MapIterator___key;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 0;
+  /* ./../lib/standard//collection//abstract_collection.nit:277 */
+  fprintf(stderr, "Deferred method called");
+  fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 277);
   nit_exit(1);
-  tracehead = trace.prev;
+  stack_frame_head = fra.me.prev;
   return NIT_NULL;
 }
-void abstract_collection___MapIterator___item__eq(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::MapIterator::item= (bin/../lib/standard//abstract_collection.nit:276,2--277:19)"};
-  trace.prev = tracehead; tracehead = &trace;
-  fprintf(stderr, "Deferred method item= called (bin/../lib/standard//abstract_collection.nit:276,2)\n");
+val_t abstract_collection___SequenceRead___iterator(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 316;
+  fra.me.meth = LOCATE_abstract_collection___SequenceRead___iterator;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 0;
+  /* ./../lib/standard//collection//abstract_collection.nit:316 */
+  fprintf(stderr, "Deferred method called");
+  fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 316);
   nit_exit(1);
-  tracehead = trace.prev;
-  return;
+  stack_frame_head = fra.me.prev;
+  return NIT_NULL;
 }
-val_t abstract_collection___IndexedCollection___first(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::IndexedCollection::first (bin/../lib/standard//abstract_collection.nit:285,2--290:15)"};
-  val_t variable0;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 = ((abstract_collection___Collection___is_empty_t)CALL( self,COLOR_abstract_collection___Collection___is_empty))( self) /*IndexedCollection::is_empty*/;
-  if (!UNTAG_Bool( TAG_Bool(!UNTAG_Bool(variable0)))) { fprintf(stderr, "Assert 'not_empty'  failed: bin/../lib/standard//abstract_collection.nit:289,3--32\n"); nit_exit(1);}
-  variable0 = ((abstract_collection___Map_____bra_t)CALL( self,COLOR_abstract_collection___Map_____bra))( self,  TAG_Int(0)) /*IndexedCollection::[]*/;
-  goto return_label30;
-  return_label30: while(false);
-  tracehead = trace.prev;
-  return variable0;
-}
-void abstract_collection___IndexedCollection___first__eq(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::IndexedCollection::first= (bin/../lib/standard//abstract_collection.nit:293,2--296:18)"};
-  val_t variable0;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 =  param0;
-  ((abstract_collection___Map_____braeq_t)CALL( self,COLOR_abstract_collection___Map_____braeq))( self,  TAG_Int(0),  variable0 /*item*/) /*IndexedCollection::[]=*/;
-  tracehead = trace.prev;
+val_t abstract_collection___SequenceRead___first(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 288;
+  fra.me.meth = LOCATE_abstract_collection___SequenceRead___first;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  REGB0 = CALL_abstract_collection___Collection___is_empty(fra.me.REG[0])(fra.me.REG[0]);
+  REGB0 = TAG_Bool(!UNTAG_Bool(REGB0));
+  /* ./../lib/standard//collection//abstract_collection.nit:292 */
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    fprintf(stderr, "Assert %s  failed", "'not_empty'");
+    fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 292);
+    nit_exit(1);
+  }
+  REGB0 = TAG_Int(0);
+  fra.me.REG[0] = CALL_abstract_collection___MapRead_____bra(fra.me.REG[0])(fra.me.REG[0], REGB0);
+  /* ./../lib/standard//collection//abstract_collection.nit:293 */
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+val_t abstract_collection___SequenceRead___last(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 296;
+  fra.me.meth = LOCATE_abstract_collection___SequenceRead___last;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  REGB0 = CALL_abstract_collection___Collection___is_empty(fra.me.REG[0])(fra.me.REG[0]);
+  REGB0 = TAG_Bool(!UNTAG_Bool(REGB0));
+  /* ./../lib/standard//collection//abstract_collection.nit:300 */
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    fprintf(stderr, "Assert %s  failed", "'not_empty'");
+    fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 300);
+    nit_exit(1);
+  }
+  REGB0 = CALL_abstract_collection___Collection___length(fra.me.REG[0])(fra.me.REG[0]);
+  REGB1 = TAG_Int(1);
+  REGB1 = TAG_Int(UNTAG_Int(REGB0)-UNTAG_Int(REGB1));
+  fra.me.REG[0] = CALL_abstract_collection___MapRead_____bra(fra.me.REG[0])(fra.me.REG[0], REGB1);
+  /* ./../lib/standard//collection//abstract_collection.nit:301 */
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+val_t abstract_collection___SequenceRead___index_of(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 304;
+  fra.me.meth = LOCATE_abstract_collection___SequenceRead___index_of;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 3;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  fra.me.REG[0] = CALL_abstract_collection___Collection___iterator(fra.me.REG[0])(fra.me.REG[0]);
+  /* ./../lib/standard//collection//abstract_collection.nit:309 */
+  while(1) {
+    REGB0 = CALL_abstract_collection___Iterator___is_ok(fra.me.REG[0])(fra.me.REG[0]);
+    if (UNTAG_Bool(REGB0)) {
+      fra.me.REG[2] = CALL_abstract_collection___Iterator___item(fra.me.REG[0])(fra.me.REG[0]);
+      REGB0 = TAG_Bool(IS_EQUAL_NN(fra.me.REG[2],fra.me.REG[1]));
+      /* ./../lib/standard//collection//abstract_collection.nit:310 */
+      if (UNTAG_Bool(REGB0)) {
+      } else {
+        REGB1 = TAG_Bool(fra.me.REG[2]==NIT_NULL);
+        if (UNTAG_Bool(REGB1)) {
+          REGB1 = TAG_Bool(false);
+          REGB0 = REGB1;
+        } else {
+          REGB1 = CALL_kernel___Object_____eqeq(fra.me.REG[2])(fra.me.REG[2], fra.me.REG[1]);
+          REGB0 = REGB1;
+        }
+      }
+      if (UNTAG_Bool(REGB0)) {
+        REGB0 = CALL_abstract_collection___IndexedIterator___index(fra.me.REG[0])(fra.me.REG[0]);
+        goto label1;
+      }
+      /* ./../lib/standard//collection//abstract_collection.nit:311 */
+      CALL_abstract_collection___Iterator___next(fra.me.REG[0])(fra.me.REG[0]);
+    } else {
+      /* ./../lib/standard//collection//abstract_collection.nit:309 */
+      goto label2;
+    }
+  }
+  label2: while(0);
+  REGB1 = TAG_Int(1);
+  REGB1 = TAG_Int(-UNTAG_Int(REGB1));
+  REGB0 = REGB1;
+  /* ./../lib/standard//collection//abstract_collection.nit:313 */
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+void abstract_collection___Sequence___add(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 342;
+  fra.me.meth = LOCATE_abstract_collection___Sequence___add;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ./../lib/standard//collection//abstract_collection.nit:343 */
+  CALL_abstract_collection___Sequence___push(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+  stack_frame_head = fra.me.prev;
   return;
 }
-val_t abstract_collection___IndexedCollection___last(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::IndexedCollection::last (bin/../lib/standard//abstract_collection.nit:298,2--303:22)"};
-  val_t variable0;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 = ((abstract_collection___Collection___is_empty_t)CALL( self,COLOR_abstract_collection___Collection___is_empty))( self) /*IndexedCollection::is_empty*/;
-  if (!UNTAG_Bool( TAG_Bool(!UNTAG_Bool(variable0)))) { fprintf(stderr, "Assert 'not_empty'  failed: bin/../lib/standard//abstract_collection.nit:302,3--32\n"); nit_exit(1);}
-  variable0 = ((abstract_collection___Collection___length_t)CALL( self,COLOR_abstract_collection___Collection___length))( self) /*IndexedCollection::length*/;
-  variable0 = TAG_Int(UNTAG_Int(variable0)-UNTAG_Int( TAG_Int(1)));
-  variable0 = ((abstract_collection___Map_____bra_t)CALL( self,COLOR_abstract_collection___Map_____bra))( self, variable0) /*IndexedCollection::[]*/;
-  goto return_label32;
-  return_label32: while(false);
-  tracehead = trace.prev;
-  return variable0;
-}
-void abstract_collection___IndexedCollection___last__eq(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::IndexedCollection::last= (bin/../lib/standard//abstract_collection.nit:306,2--314:17)"};
-  val_t variable0;
-  val_t variable1;
-  val_t variable2;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 =  param0;
-  variable2 = ((abstract_collection___Collection___length_t)CALL( self,COLOR_abstract_collection___Collection___length))( self) /*IndexedCollection::length*/;
-  variable1 = variable2;
-  variable2 = TAG_Bool(UNTAG_Int( variable1 /*l*/)>UNTAG_Int( TAG_Int(0)));
-  if (UNTAG_Bool(variable2)) { /*if*/
-    variable2 = TAG_Int(UNTAG_Int( variable1 /*l*/)-UNTAG_Int( TAG_Int(1)));
-    ((abstract_collection___Map_____braeq_t)CALL( self,COLOR_abstract_collection___Map_____braeq))( self, variable2,  variable0 /*item*/) /*IndexedCollection::[]=*/;
-  } else { /*if*/
-    ((abstract_collection___Map_____braeq_t)CALL( self,COLOR_abstract_collection___Map_____braeq))( self,  TAG_Int(0),  variable0 /*item*/) /*IndexedCollection::[]=*/;
-  }
-  tracehead = trace.prev;
+void abstract_collection___Sequence___first__eq(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 325;
+  fra.me.meth = LOCATE_abstract_collection___Sequence___first__eq;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  REGB0 = TAG_Int(0);
+  /* ./../lib/standard//collection//abstract_collection.nit:328 */
+  CALL_abstract_collection___Map_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB0, fra.me.REG[1]);
+  stack_frame_head = fra.me.prev;
   return;
 }
-void abstract_collection___IndexedCollection___add(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::IndexedCollection::add (bin/../lib/standard//abstract_collection.nit:318,2--319:28)"};
-  val_t variable0;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 =  param0;
-  ((abstract_collection___IndexedCollection___push_t)CALL( self,COLOR_abstract_collection___IndexedCollection___push))( self,  variable0 /*e*/) /*IndexedCollection::push*/;
-  tracehead = trace.prev;
+void abstract_collection___Sequence___last__eq(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 330;
+  fra.me.meth = LOCATE_abstract_collection___Sequence___last__eq;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  REGB0 = CALL_abstract_collection___Collection___length(fra.me.REG[0])(fra.me.REG[0]);
+  REGB1 = TAG_Int(0);
+  REGB1 = TAG_Bool(UNTAG_Int(REGB0)>UNTAG_Int(REGB1));
+  /* ./../lib/standard//collection//abstract_collection.nit:335 */
+  if (UNTAG_Bool(REGB1)) {
+    REGB1 = TAG_Int(1);
+    REGB1 = TAG_Int(UNTAG_Int(REGB0)-UNTAG_Int(REGB1));
+    /* ./../lib/standard//collection//abstract_collection.nit:336 */
+    CALL_abstract_collection___Map_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB1, fra.me.REG[1]);
+  } else {
+    REGB1 = TAG_Int(0);
+    /* ./../lib/standard//collection//abstract_collection.nit:338 */
+    CALL_abstract_collection___Map_____braeq(fra.me.REG[0])(fra.me.REG[0], REGB1, fra.me.REG[1]);
+  }
+  stack_frame_head = fra.me.prev;
   return;
 }
-void abstract_collection___IndexedCollection___push(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::IndexedCollection::push (bin/../lib/standard//abstract_collection.nit:321,2--322:15)"};
-  trace.prev = tracehead; tracehead = &trace;
-  fprintf(stderr, "Deferred method push called (bin/../lib/standard//abstract_collection.nit:321,2)\n");
+void abstract_collection___Sequence___push(val_t p0, val_t p1){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 345;
+  fra.me.meth = LOCATE_abstract_collection___Sequence___push;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 0;
+  /* ./../lib/standard//collection//abstract_collection.nit:345 */
+  fprintf(stderr, "Deferred method called");
+  fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 345);
   nit_exit(1);
-  tracehead = trace.prev;
+  stack_frame_head = fra.me.prev;
   return;
 }
-void abstract_collection___IndexedCollection___append(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::IndexedCollection::append (bin/../lib/standard//abstract_collection.nit:324,2--325:81)"};
-  val_t variable0;
-  val_t variable1;
-      val_t variable2;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 =  param0;
-  variable1 = TAG_Bool(!UNTAG_Bool(TAG_Bool(( variable0 /*coll*/ ==  NIT_NULL /*null*/) || (( variable0 /*coll*/ != NIT_NULL) && ((((kernel___Object_____eqeq_t)CALL( variable0 /*coll*/,COLOR_kernel___Object_____eqeq))==kernel___Object_____eqeq)?(IS_EQUAL_NN( variable0 /*coll*/, NIT_NULL /*null*/)):(UNTAG_Bool(((kernel___Object_____eqeq_t)CALL( variable0 /*coll*/,COLOR_kernel___Object_____eqeq))( variable0 /*coll*/,  NIT_NULL /*null*/) /*Collection::==*/)))))));
-  if (UNTAG_Bool(variable1)) { /*if*/
-    variable1 = ((abstract_collection___Collection___iterator_t)CALL( variable0 /*coll*/,COLOR_abstract_collection___Collection___iterator))( variable0 /*coll*/) /*Collection::iterator*/;
-    while (true) { /*for*/
-      variable2 = ((abstract_collection___Iterator___is_ok_t)CALL(variable1,COLOR_abstract_collection___Iterator___is_ok))(variable1) /*Iterator::is_ok*/;
-      if (!UNTAG_Bool(variable2)) break; /*for*/
-      variable2 = ((abstract_collection___Iterator___item_t)CALL(variable1,COLOR_abstract_collection___Iterator___item))(variable1) /*Iterator::item*/;
-      ((abstract_collection___IndexedCollection___push_t)CALL( self,COLOR_abstract_collection___IndexedCollection___push))( self,  variable2 /*i*/) /*IndexedCollection::push*/;
-      continue_36: while(0);
-      ((abstract_collection___Iterator___next_t)CALL(variable1,COLOR_abstract_collection___Iterator___next))(variable1) /*Iterator::next*/;
+void abstract_collection___Sequence___append(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 348;
+  fra.me.meth = LOCATE_abstract_collection___Sequence___append;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 3;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  fra.me.REG[1] = CALL_abstract_collection___Collection___iterator(fra.me.REG[1])(fra.me.REG[1]);
+  /* ./../lib/standard//collection//abstract_collection.nit:349 */
+  while(1) {
+    REGB0 = CALL_abstract_collection___Iterator___is_ok(fra.me.REG[1])(fra.me.REG[1]);
+    if (UNTAG_Bool(REGB0)) {
+      fra.me.REG[2] = CALL_abstract_collection___Iterator___item(fra.me.REG[1])(fra.me.REG[1]);
+      CALL_abstract_collection___Sequence___push(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[2]);
+    } else {
+      goto label1;
     }
-    break_36: while(0);
+    CALL_abstract_collection___Iterator___next(fra.me.REG[1])(fra.me.REG[1]);
   }
-  tracehead = trace.prev;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
   return;
 }
-val_t abstract_collection___IndexedCollection___pop(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::IndexedCollection::pop (bin/../lib/standard//abstract_collection.nit:327,2--328:12)"};
-  trace.prev = tracehead; tracehead = &trace;
-  fprintf(stderr, "Deferred method pop called (bin/../lib/standard//abstract_collection.nit:327,2)\n");
+val_t abstract_collection___Sequence___pop(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 351;
+  fra.me.meth = LOCATE_abstract_collection___Sequence___pop;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 0;
+  /* ./../lib/standard//collection//abstract_collection.nit:351 */
+  fprintf(stderr, "Deferred method called");
+  fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 351);
   nit_exit(1);
-  tracehead = trace.prev;
+  stack_frame_head = fra.me.prev;
   return NIT_NULL;
 }
-void abstract_collection___IndexedCollection___unshift(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::IndexedCollection::unshift (bin/../lib/standard//abstract_collection.nit:330,2--331:18)"};
-  trace.prev = tracehead; tracehead = &trace;
-  fprintf(stderr, "Deferred method unshift called (bin/../lib/standard//abstract_collection.nit:330,2)\n");
+void abstract_collection___Sequence___unshift(val_t p0, val_t p1){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 354;
+  fra.me.meth = LOCATE_abstract_collection___Sequence___unshift;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 0;
+  /* ./../lib/standard//collection//abstract_collection.nit:354 */
+  fprintf(stderr, "Deferred method called");
+  fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 354);
   nit_exit(1);
-  tracehead = trace.prev;
+  stack_frame_head = fra.me.prev;
   return;
 }
-val_t abstract_collection___IndexedCollection___shift(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::IndexedCollection::shift (bin/../lib/standard//abstract_collection.nit:333,2--335:14)"};
-  trace.prev = tracehead; tracehead = &trace;
-  fprintf(stderr, "Deferred method shift called (bin/../lib/standard//abstract_collection.nit:333,2)\n");
+val_t abstract_collection___Sequence___shift(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 357;
+  fra.me.meth = LOCATE_abstract_collection___Sequence___shift;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 0;
+  /* ./../lib/standard//collection//abstract_collection.nit:357 */
+  fprintf(stderr, "Deferred method called");
+  fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 357);
   nit_exit(1);
-  tracehead = trace.prev;
+  stack_frame_head = fra.me.prev;
   return NIT_NULL;
 }
-val_t abstract_collection___IndexedCollection___index_of(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::IndexedCollection::index_of (bin/../lib/standard//abstract_collection.nit:337,2--346:11)"};
-  val_t variable0;
-  val_t variable1;
-  val_t variable2;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 =  param0;
-  variable2 = ((abstract_collection___IndexedCollection___iterator_t)CALL( self,COLOR_abstract_collection___Collection___iterator))( self) /*IndexedCollection::iterator*/;
-  variable1 = variable2;
-  while (true) { /*while*/
-    variable2 = ((abstract_collection___Iterator___is_ok_t)CALL( variable1 /*i*/,COLOR_abstract_collection___Iterator___is_ok))( variable1 /*i*/) /*IndexedIterator::is_ok*/;
-    if (!UNTAG_Bool(variable2)) break; /* while*/
-    variable2 = ((abstract_collection___Iterator___item_t)CALL( variable1 /*i*/,COLOR_abstract_collection___Iterator___item))( variable1 /*i*/) /*IndexedIterator::item*/;
-    variable2 = TAG_Bool((variable2 ==  variable0 /*item*/) || ((variable2 != NIT_NULL) && ((((kernel___Object_____eqeq_t)CALL(variable2,COLOR_kernel___Object_____eqeq))==kernel___Object_____eqeq)?(IS_EQUAL_NN(variable2, variable0 /*item*/)):(UNTAG_Bool(((kernel___Object_____eqeq_t)CALL(variable2,COLOR_kernel___Object_____eqeq))(variable2,  variable0 /*item*/) /*Object::==*/)))));
-    if (UNTAG_Bool(variable2)) { /*if*/
-      variable2 = ((abstract_collection___IndexedIterator___index_t)CALL( variable1 /*i*/,COLOR_abstract_collection___IndexedIterator___index))( variable1 /*i*/) /*IndexedIterator::index*/;
-      variable1 = variable2;
-      goto return_label37;
-    }
-    ((abstract_collection___Iterator___next_t)CALL( variable1 /*i*/,COLOR_abstract_collection___Iterator___next))( variable1 /*i*/) /*IndexedIterator::next*/;
-    continue_38: while(0);
-  }
-  break_38: while(0);
-  variable2 = TAG_Int(-UNTAG_Int( TAG_Int(1)));
-  variable1 = variable2;
-  goto return_label37;
-  return_label37: while(false);
-  tracehead = trace.prev;
-  return variable1;
-}
-val_t abstract_collection___IndexedCollection___iterator(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::IndexedCollection::iterator (bin/../lib/standard//abstract_collection.nit:349,2--39)"};
-  trace.prev = tracehead; tracehead = &trace;
-  fprintf(stderr, "Deferred method iterator called (bin/../lib/standard//abstract_collection.nit:349,2)\n");
+val_t abstract_collection___IndexedIterator___key(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 369;
+  fra.me.meth = LOCATE_abstract_collection___IndexedIterator___key;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  REGB0 = CALL_abstract_collection___IndexedIterator___index(fra.me.REG[0])(fra.me.REG[0]);
+  /* ./../lib/standard//collection//abstract_collection.nit:370 */
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+val_t abstract_collection___IndexedIterator___index(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 366;
+  fra.me.meth = LOCATE_abstract_collection___IndexedIterator___index;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 0;
+  /* ./../lib/standard//collection//abstract_collection.nit:366 */
+  fprintf(stderr, "Deferred method called");
+  fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 366);
   nit_exit(1);
-  tracehead = trace.prev;
+  stack_frame_head = fra.me.prev;
   return NIT_NULL;
 }
-val_t abstract_collection___IndexedIterator___index(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::IndexedIterator::index (bin/../lib/standard//abstract_collection.nit:355,2--356:16)"};
-  trace.prev = tracehead; tracehead = &trace;
-  fprintf(stderr, "Deferred method index called (bin/../lib/standard//abstract_collection.nit:355,2)\n");
-  nit_exit(1);
-  tracehead = trace.prev;
-  return NIT_NULL;
-}
-val_t abstract_collection___IndexedIterator___key(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::IndexedIterator::key (bin/../lib/standard//abstract_collection.nit:358,2--359:31)"};
-  val_t variable0;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 = ((abstract_collection___IndexedIterator___index_t)CALL( self,COLOR_abstract_collection___IndexedIterator___index))( self) /*IndexedIterator::index*/;
-  goto return_label39;
-  return_label39: while(false);
-  tracehead = trace.prev;
-  return variable0;
-}
-val_t abstract_collection___CoupleMap___couple_at(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::CoupleMap::couple_at (bin/../lib/standard//abstract_collection.nit:365,2--367:46)"};
-  trace.prev = tracehead; tracehead = &trace;
-  fprintf(stderr, "Deferred method couple_at called (bin/../lib/standard//abstract_collection.nit:365,2)\n");
+val_t abstract_collection___CoupleMap_____bra(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 380;
+  fra.me.meth = LOCATE_abstract_collection___CoupleMap_____bra;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  fra.me.REG[1] = CALL_abstract_collection___CoupleMap___couple_at(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+  REGB0 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
+  /* ./../lib/standard//collection//abstract_collection.nit:383 */
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    REGB1 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
+    if (UNTAG_Bool(REGB1)) {
+      REGB1 = TAG_Bool(false);
+      REGB0 = REGB1;
+    } else {
+      REGB1 = CALL_kernel___Object_____eqeq(fra.me.REG[1])(fra.me.REG[1], NIT_NULL);
+      REGB0 = REGB1;
+    }
+  }
+  if (UNTAG_Bool(REGB0)) {
+    /* ./../lib/standard//collection//abstract_collection.nit:384 */
+    fprintf(stderr, "Aborted");
+    fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 384);
+    nit_exit(1);
+  } else {
+    REGB0 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
+    /* ./../lib/standard//collection//abstract_collection.nit:386 */
+    if (UNTAG_Bool(REGB0)) {
+      fprintf(stderr, "Reciever is null");
+      fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 386);
+      nit_exit(1);
+    }
+    fra.me.REG[1] = CALL_abstract_collection___Couple___second(fra.me.REG[1])(fra.me.REG[1]);
+    goto label1;
+  }
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[1];
+}
+val_t abstract_collection___CoupleMap___has_key(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t REGB0;
+  val_t REGB1;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 390;
+  fra.me.meth = LOCATE_abstract_collection___CoupleMap___has_key;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  fra.me.REG[1] = CALL_abstract_collection___CoupleMap___couple_at(fra.me.REG[0])(fra.me.REG[0], fra.me.REG[1]);
+  REGB0 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
+  /* ./../lib/standard//collection//abstract_collection.nit:390 */
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    REGB1 = TAG_Bool(fra.me.REG[1]==NIT_NULL);
+    if (UNTAG_Bool(REGB1)) {
+      REGB1 = TAG_Bool(false);
+      REGB0 = REGB1;
+    } else {
+      REGB1 = CALL_kernel___Object_____eqeq(fra.me.REG[1])(fra.me.REG[1], NIT_NULL);
+      REGB0 = REGB1;
+    }
+  }
+  REGB0 = TAG_Bool(!UNTAG_Bool(REGB0));
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+val_t abstract_collection___CoupleMap___couple_at(val_t p0, val_t p1){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 376;
+  fra.me.meth = LOCATE_abstract_collection___CoupleMap___couple_at;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 0;
+  /* ./../lib/standard//collection//abstract_collection.nit:376 */
+  fprintf(stderr, "Deferred method called");
+  fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 376);
   nit_exit(1);
-  tracehead = trace.prev;
+  stack_frame_head = fra.me.prev;
   return NIT_NULL;
 }
-val_t abstract_collection___CoupleMap_____bra(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::CoupleMap::[] (bin/../lib/standard//abstract_collection.nit:369,2--375:18)"};
-  val_t variable0;
-  val_t variable1;
-  val_t variable2;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 =  param0;
-  variable2 = ((abstract_collection___CoupleMap___couple_at_t)CALL( self,COLOR_abstract_collection___CoupleMap___couple_at))( self,  variable0 /*key*/) /*CoupleMap::couple_at*/;
-  variable1 = variable2;
-  variable2 = TAG_Bool(( variable1 /*c*/ ==  NIT_NULL /*null*/) || (( variable1 /*c*/ != NIT_NULL) && ((((kernel___Object_____eqeq_t)CALL( variable1 /*c*/,COLOR_kernel___Object_____eqeq))==kernel___Object_____eqeq)?(IS_EQUAL_NN( variable1 /*c*/, NIT_NULL /*null*/)):(UNTAG_Bool(((kernel___Object_____eqeq_t)CALL( variable1 /*c*/,COLOR_kernel___Object_____eqeq))( variable1 /*c*/,  NIT_NULL /*null*/) /*Couple::==*/)))));
-  if (UNTAG_Bool(variable2)) { /*if*/
-    variable1 =  NIT_NULL /*null*/;
-    goto return_label40;
-  } else { /*if*/
-    variable2 = ((abstract_collection___Couple___second_t)CALL( variable1 /*c*/,COLOR_abstract_collection___Couple___second))( variable1 /*c*/) /*Couple::second*/;
-    variable1 = variable2;
-    goto return_label40;
-  }
-  return_label40: while(false);
-  tracehead = trace.prev;
-  return variable1;
-}
-val_t abstract_collection___CoupleMap___has_key(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::CoupleMap::has_key (bin/../lib/standard//abstract_collection.nit:379,2--57)"};
-  val_t variable0;
-  val_t variable1;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 =  param0;
-  variable1 = ((abstract_collection___CoupleMap___couple_at_t)CALL( self,COLOR_abstract_collection___CoupleMap___couple_at))( self,  variable0 /*key*/) /*CoupleMap::couple_at*/;
-  variable1 = TAG_Bool(!UNTAG_Bool(TAG_Bool((variable1 ==  NIT_NULL /*null*/) || ((variable1 != NIT_NULL) && ((((kernel___Object_____eqeq_t)CALL(variable1,COLOR_kernel___Object_____eqeq))==kernel___Object_____eqeq)?(IS_EQUAL_NN(variable1, NIT_NULL /*null*/)):(UNTAG_Bool(((kernel___Object_____eqeq_t)CALL(variable1,COLOR_kernel___Object_____eqeq))(variable1,  NIT_NULL /*null*/) /*Couple::==*/)))))));
-  goto return_label41;
-  return_label41: while(false);
-  tracehead = trace.prev;
-  return variable1;
-}
-val_t abstract_collection___CoupleMapIterator___item(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::CoupleMapIterator::item (bin/../lib/standard//abstract_collection.nit:387,2--44)"};
-  val_t variable0;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 = ATTR_abstract_collection___CoupleMapIterator____iter( self) /*CoupleMapIterator::_iter*/;
-  variable0 = ((abstract_collection___Iterator___item_t)CALL(variable0,COLOR_abstract_collection___Iterator___item))(variable0) /*Iterator::item*/;
-  variable0 = ((abstract_collection___Couple___second_t)CALL(variable0,COLOR_abstract_collection___Couple___second))(variable0) /*Couple::second*/;
-  goto return_label42;
-  return_label42: while(false);
-  tracehead = trace.prev;
-  return variable0;
-}
-void abstract_collection___CoupleMapIterator___item__eq(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::CoupleMapIterator::item= (bin/../lib/standard//abstract_collection.nit:389,2--45)"};
-  val_t variable0;
-  val_t variable1;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 =  param0;
-  variable1 = ATTR_abstract_collection___CoupleMapIterator____iter( self) /*CoupleMapIterator::_iter*/;
-  variable1 = ((abstract_collection___Iterator___item_t)CALL(variable1,COLOR_abstract_collection___Iterator___item))(variable1) /*Iterator::item*/;
-  ((abstract_collection___Couple___second__eq_t)CALL(variable1,COLOR_abstract_collection___Couple___second__eq))(variable1,  variable0 /*e*/) /*Couple::second=*/;
-  tracehead = trace.prev;
-  return;
-}
-val_t abstract_collection___CoupleMapIterator___key(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::CoupleMapIterator::key (bin/../lib/standard//abstract_collection.nit:391,2--42)"};
-  val_t variable0;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 = ATTR_abstract_collection___CoupleMapIterator____iter( self) /*CoupleMapIterator::_iter*/;
-  variable0 = ((abstract_collection___Iterator___item_t)CALL(variable0,COLOR_abstract_collection___Iterator___item))(variable0) /*Iterator::item*/;
-  variable0 = ((abstract_collection___Couple___first_t)CALL(variable0,COLOR_abstract_collection___Couple___first))(variable0) /*Couple::first*/;
-  goto return_label44;
-  return_label44: while(false);
-  tracehead = trace.prev;
-  return variable0;
-}
-val_t abstract_collection___CoupleMapIterator___is_ok(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::CoupleMapIterator::is_ok (bin/../lib/standard//abstract_collection.nit:393,2--39)"};
-  val_t variable0;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 = ATTR_abstract_collection___CoupleMapIterator____iter( self) /*CoupleMapIterator::_iter*/;
-  variable0 = ((abstract_collection___Iterator___is_ok_t)CALL(variable0,COLOR_abstract_collection___Iterator___is_ok))(variable0) /*Iterator::is_ok*/;
-  goto return_label45;
-  return_label45: while(false);
-  tracehead = trace.prev;
-  return variable0;
-}
-void abstract_collection___CoupleMapIterator___next(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::CoupleMapIterator::next (bin/../lib/standard//abstract_collection.nit:395,2--398:56)"};
-  val_t variable0;
-    val_t variable1;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 = ATTR_abstract_collection___CoupleMapIterator____iter( self) /*CoupleMapIterator::_iter*/;
-  ((abstract_collection___Iterator___next_t)CALL(variable0,COLOR_abstract_collection___Iterator___next))(variable0) /*Iterator::next*/;
-  while (true) { /*while*/
-    variable0 = ATTR_abstract_collection___CoupleMapIterator____iter( self) /*CoupleMapIterator::_iter*/;
-    variable0 = ((abstract_collection___Iterator___is_ok_t)CALL(variable0,COLOR_abstract_collection___Iterator___is_ok))(variable0) /*Iterator::is_ok*/;
-    variable1 = variable0;
-    if (UNTAG_Bool(variable1)) { /* and */
-      variable1 = ATTR_abstract_collection___CoupleMapIterator____iter( self) /*CoupleMapIterator::_iter*/;
-      variable1 = ((abstract_collection___Iterator___item_t)CALL(variable1,COLOR_abstract_collection___Iterator___item))(variable1) /*Iterator::item*/;
-      variable1 = TAG_Bool((variable1 ==  NIT_NULL /*null*/) || ((variable1 != NIT_NULL) && ((((kernel___Object_____eqeq_t)CALL(variable1,COLOR_kernel___Object_____eqeq))==kernel___Object_____eqeq)?(IS_EQUAL_NN(variable1, NIT_NULL /*null*/)):(UNTAG_Bool(((kernel___Object_____eqeq_t)CALL(variable1,COLOR_kernel___Object_____eqeq))(variable1,  NIT_NULL /*null*/) /*Couple::==*/)))));
-    }
-    variable0 = variable1;
-    if (!UNTAG_Bool(variable0)) break; /* while*/
-    variable0 = ATTR_abstract_collection___CoupleMapIterator____iter( self) /*CoupleMapIterator::_iter*/;
-    ((abstract_collection___Iterator___next_t)CALL(variable0,COLOR_abstract_collection___Iterator___next))(variable0) /*Iterator::next*/;
-    continue_47: while(0);
-  }
-  break_47: while(0);
-  tracehead = trace.prev;
+val_t abstract_collection___CoupleMapIterator___item(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 398;
+  fra.me.meth = LOCATE_abstract_collection___CoupleMapIterator___item;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  REGB0 = TAG_Bool(ATTR_abstract_collection___CoupleMapIterator____iter(fra.me.REG[0])!=NIT_NULL);
+  /* ./../lib/standard//collection//abstract_collection.nit:398 */
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    fprintf(stderr, "Uninitialized attribute %s", "_iter");
+    fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 398);
+    nit_exit(1);
+  }
+  fra.me.REG[0] = ATTR_abstract_collection___CoupleMapIterator____iter(fra.me.REG[0]);
+  fra.me.REG[0] = CALL_abstract_collection___Iterator___item(fra.me.REG[0])(fra.me.REG[0]);
+  REGB0 = TAG_Bool(fra.me.REG[0]==NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+    fprintf(stderr, "Reciever is null");
+    fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 398);
+    nit_exit(1);
+  }
+  fra.me.REG[0] = CALL_abstract_collection___Couple___second(fra.me.REG[0])(fra.me.REG[0]);
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+void abstract_collection___CoupleMapIterator___next(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 406;
+  fra.me.meth = LOCATE_abstract_collection___CoupleMapIterator___next;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  REGB0 = TAG_Bool(ATTR_abstract_collection___CoupleMapIterator____iter(fra.me.REG[0])!=NIT_NULL);
+  /* ./../lib/standard//collection//abstract_collection.nit:408 */
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    fprintf(stderr, "Uninitialized attribute %s", "_iter");
+    fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 408);
+    nit_exit(1);
+  }
+  fra.me.REG[0] = ATTR_abstract_collection___CoupleMapIterator____iter(fra.me.REG[0]);
+  CALL_abstract_collection___Iterator___next(fra.me.REG[0])(fra.me.REG[0]);
+  stack_frame_head = fra.me.prev;
   return;
 }
-void abstract_collection___CoupleMapIterator___init(val_t  self, val_t  param0, int* init_table) {
-  struct trace_t trace = {NULL, "abstract_collection::CoupleMapIterator::init (bin/../lib/standard//abstract_collection.nit:403,2--44)"};
-  val_t variable0;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 =  param0;
-  if (init_table[VAL2OBJ( self)->vft[INIT_TABLE_POS_CoupleMapIterator].i]) return;
-  ATTR_abstract_collection___CoupleMapIterator____iter( self) /*CoupleMapIterator::_iter*/ =  variable0 /*i*/;
-  init_table[VAL2OBJ( self)->vft[INIT_TABLE_POS_CoupleMapIterator].i] = 1;
-  tracehead = trace.prev;
+val_t abstract_collection___CoupleMapIterator___is_ok(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 404;
+  fra.me.meth = LOCATE_abstract_collection___CoupleMapIterator___is_ok;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  REGB0 = TAG_Bool(ATTR_abstract_collection___CoupleMapIterator____iter(fra.me.REG[0])!=NIT_NULL);
+  /* ./../lib/standard//collection//abstract_collection.nit:404 */
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    fprintf(stderr, "Uninitialized attribute %s", "_iter");
+    fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 404);
+    nit_exit(1);
+  }
+  fra.me.REG[0] = ATTR_abstract_collection___CoupleMapIterator____iter(fra.me.REG[0]);
+  REGB0 = CALL_abstract_collection___Iterator___is_ok(fra.me.REG[0])(fra.me.REG[0]);
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return REGB0;
+}
+val_t abstract_collection___CoupleMapIterator___key(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t REGB0;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 402;
+  fra.me.meth = LOCATE_abstract_collection___CoupleMapIterator___key;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  REGB0 = TAG_Bool(ATTR_abstract_collection___CoupleMapIterator____iter(fra.me.REG[0])!=NIT_NULL);
+  /* ./../lib/standard//collection//abstract_collection.nit:402 */
+  if (UNTAG_Bool(REGB0)) {
+  } else {
+    fprintf(stderr, "Uninitialized attribute %s", "_iter");
+    fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 402);
+    nit_exit(1);
+  }
+  fra.me.REG[0] = ATTR_abstract_collection___CoupleMapIterator____iter(fra.me.REG[0]);
+  fra.me.REG[0] = CALL_abstract_collection___Iterator___item(fra.me.REG[0])(fra.me.REG[0]);
+  REGB0 = TAG_Bool(fra.me.REG[0]==NIT_NULL);
+  if (UNTAG_Bool(REGB0)) {
+    fprintf(stderr, "Reciever is null");
+    fprintf(stderr, " (%s:%d)\n", LOCATE_abstract_collection, 402);
+    nit_exit(1);
+  }
+  fra.me.REG[0] = CALL_abstract_collection___Couple___first(fra.me.REG[0])(fra.me.REG[0]);
+  goto label1;
+  label1: while(0);
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+void abstract_collection___CoupleMapIterator___init(val_t p0, val_t p1, int* init_table){
+  int itpos2 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_CoupleMapIterator].i;
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t tmp;
+  if (init_table[itpos2]) return;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 413;
+  fra.me.meth = LOCATE_abstract_collection___CoupleMapIterator___init;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ./../lib/standard//collection//abstract_collection.nit:413 */
+  ATTR_abstract_collection___CoupleMapIterator____iter(fra.me.REG[0]) = fra.me.REG[1];
+  stack_frame_head = fra.me.prev;
+  init_table[itpos2] = 1;
   return;
 }
-val_t abstract_collection___Couple___first(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::Couple::first (bin/../lib/standard//abstract_collection.nit:411,2--412:33)"};
-  trace.prev = tracehead; tracehead = &trace;
-  tracehead = trace.prev;
-  return ATTR_abstract_collection___Couple____first( self) /*Couple::_first*/;
-}
-void abstract_collection___Couple___first__eq(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::Couple::first= (bin/../lib/standard//abstract_collection.nit:411,2--412:33)"};
-  trace.prev = tracehead; tracehead = &trace;
-  ATTR_abstract_collection___Couple____first( self) /*Couple::_first*/ =  param0;
-  tracehead = trace.prev;
+val_t abstract_collection___Couple___first(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 421;
+  fra.me.meth = LOCATE_abstract_collection___Couple___first;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[0] = ATTR_abstract_collection___Couple____first(fra.me.REG[0]);
+  /* ./../lib/standard//collection//abstract_collection.nit:421 */
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+void abstract_collection___Couple___first__eq(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 421;
+  fra.me.meth = LOCATE_abstract_collection___Couple___first__eq;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ./../lib/standard//collection//abstract_collection.nit:421 */
+  ATTR_abstract_collection___Couple____first(fra.me.REG[0]) = fra.me.REG[1];
+  stack_frame_head = fra.me.prev;
   return;
 }
-val_t abstract_collection___Couple___second(val_t  self) {
-  struct trace_t trace = {NULL, "abstract_collection::Couple::second (bin/../lib/standard//abstract_collection.nit:414,2--415:34)"};
-  trace.prev = tracehead; tracehead = &trace;
-  tracehead = trace.prev;
-  return ATTR_abstract_collection___Couple____second( self) /*Couple::_second*/;
-}
-void abstract_collection___Couple___second__eq(val_t  self, val_t  param0) {
-  struct trace_t trace = {NULL, "abstract_collection::Couple::second= (bin/../lib/standard//abstract_collection.nit:414,2--415:34)"};
-  trace.prev = tracehead; tracehead = &trace;
-  ATTR_abstract_collection___Couple____second( self) /*Couple::_second*/ =  param0;
-  tracehead = trace.prev;
+val_t abstract_collection___Couple___second(val_t p0){
+  struct {struct stack_frame_t me;} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 424;
+  fra.me.meth = LOCATE_abstract_collection___Couple___second;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 1;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[0] = ATTR_abstract_collection___Couple____second(fra.me.REG[0]);
+  /* ./../lib/standard//collection//abstract_collection.nit:424 */
+  stack_frame_head = fra.me.prev;
+  return fra.me.REG[0];
+}
+void abstract_collection___Couple___second__eq(val_t p0, val_t p1){
+  struct {struct stack_frame_t me; val_t MORE_REG[1];} fra;
+  val_t tmp;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 424;
+  fra.me.meth = LOCATE_abstract_collection___Couple___second__eq;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 2;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  /* ./../lib/standard//collection//abstract_collection.nit:424 */
+  ATTR_abstract_collection___Couple____second(fra.me.REG[0]) = fra.me.REG[1];
+  stack_frame_head = fra.me.prev;
   return;
 }
-void abstract_collection___Couple___init(val_t  self, val_t  param0, val_t  param1, int* init_table) {
-  struct trace_t trace = {NULL, "abstract_collection::Couple::init (bin/../lib/standard//abstract_collection.nit:417,2--421:13)"};
-  val_t variable0;
-  val_t variable1;
-  trace.prev = tracehead; tracehead = &trace;
-  variable0 =  param0;
-  variable1 =  param1;
-  if (init_table[VAL2OBJ( self)->vft[INIT_TABLE_POS_Couple].i]) return;
-  ATTR_abstract_collection___Couple____first( self) /*Couple::_first*/ =  variable0 /*f*/;
-  ATTR_abstract_collection___Couple____second( self) /*Couple::_second*/ =  variable1 /*s*/;
-  init_table[VAL2OBJ( self)->vft[INIT_TABLE_POS_Couple].i] = 1;
-  tracehead = trace.prev;
+void abstract_collection___Couple___init(val_t p0, val_t p1, val_t p2, int* init_table){
+  int itpos3 = VAL2OBJ(p0)->vft[INIT_TABLE_POS_Couple].i;
+  struct {struct stack_frame_t me; val_t MORE_REG[2];} fra;
+  val_t tmp;
+  if (init_table[itpos3]) return;
+  fra.me.prev = stack_frame_head; stack_frame_head = &fra.me;
+  fra.me.file = LOCATE_abstract_collection;
+  fra.me.line = 427;
+  fra.me.meth = LOCATE_abstract_collection___Couple___init;
+  fra.me.has_broke = 0;
+  fra.me.REG_size = 3;
+  fra.me.REG[0] = NIT_NULL;
+  fra.me.REG[1] = NIT_NULL;
+  fra.me.REG[2] = NIT_NULL;
+  fra.me.REG[0] = p0;
+  fra.me.REG[1] = p1;
+  fra.me.REG[2] = p2;
+  /* ./../lib/standard//collection//abstract_collection.nit:430 */
+  ATTR_abstract_collection___Couple____first(fra.me.REG[0]) = fra.me.REG[1];
+  /* ./../lib/standard//collection//abstract_collection.nit:431 */
+  ATTR_abstract_collection___Couple____second(fra.me.REG[0]) = fra.me.REG[2];
+  stack_frame_head = fra.me.prev;
+  init_table[itpos3] = 1;
   return;
 }