X-Git-Url: http://nitlanguage.org

diff --git a/c_src/kernel.sep.1.c b/c_src/kernel.sep.1.c
index 78bc01c..088d523 100644
--- a/c_src/kernel.sep.1.c
+++ b/c_src/kernel.sep.1.c
@@ -14,7 +14,7 @@ long VIRTUAL_kernel__Object__object_id(val* self) {
 long var /* : Int */;
 long var1 /* : Int */;
 long var3 /* : Int */;
-{ /* Inline kernel#Object#object_id (self) */
+{ /* Inline kernel#Object#object_id (self) on <self:Object> */
 var3 = (long)self;
 var1 = var3;
 goto RET_LABEL2;
@@ -24,23 +24,23 @@ var = var1;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Object#is_same_type for (self: Object, Object): Bool */
-short int kernel__Object__is_same_type(val* self, val* p0) {
+/* method kernel#Object#is_same_instance for (self: Object, nullable Object): Bool */
+short int kernel__Object__is_same_instance(val* self, val* p0) {
 short int var /* : Bool */;
 short int var1 /* : Bool */;
-var1 = (self == p0) || (self != NULL && p0 != NULL && self->class == p0->class); /* is_same_type_test */
+var1 = self == p0 || (p0 != NULL && self->class == p0->class && ((self->class->box_kind == 1 && ((struct instance_kernel__Int*)self)->value == ((struct instance_kernel__Int*)p0)->value) || (self->class->box_kind == 2 && ((struct instance_kernel__Bool*)self)->value == ((struct instance_kernel__Bool*)p0)->value) || (self->class->box_kind == 3 && ((struct instance_kernel__Char*)self)->value == ((struct instance_kernel__Char*)p0)->value) || (self->class->box_kind == 4 && ((struct instance_kernel__Float*)self)->value == ((struct instance_kernel__Float*)p0)->value) || (self->class->box_kind == 5 && ((struct instance_string__NativeString*)self)->value == ((struct instance_string__NativeString*)p0)->value) || (self->class->box_kind == 6 && ((struct instance_kernel__Pointer*)self)->value == ((struct instance_kernel__Pointer*)p0)->value)));
 var = var1;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Object#is_same_type for (self: Object, Object): Bool */
-short int VIRTUAL_kernel__Object__is_same_type(val* self, val* p0) {
+/* method kernel#Object#is_same_instance for (self: Object, nullable Object): Bool */
+short int VIRTUAL_kernel__Object__is_same_instance(val* self, val* p0) {
 short int var /* : Bool */;
 short int var1 /* : Bool */;
 short int var3 /* : Bool */;
-{ /* Inline kernel#Object#is_same_type (self,p0) */
-var3 = (self == p0) || (self != NULL && p0 != NULL && self->class == p0->class); /* is_same_type_test */
+{ /* Inline kernel#Object#is_same_instance (self,p0) on <self:Object> */
+var3 = self == p0 || (p0 != NULL && self->class == p0->class && ((self->class->box_kind == 1 && ((struct instance_kernel__Int*)self)->value == ((struct instance_kernel__Int*)p0)->value) || (self->class->box_kind == 2 && ((struct instance_kernel__Bool*)self)->value == ((struct instance_kernel__Bool*)p0)->value) || (self->class->box_kind == 3 && ((struct instance_kernel__Char*)self)->value == ((struct instance_kernel__Char*)p0)->value) || (self->class->box_kind == 4 && ((struct instance_kernel__Float*)self)->value == ((struct instance_kernel__Float*)p0)->value) || (self->class->box_kind == 5 && ((struct instance_string__NativeString*)self)->value == ((struct instance_string__NativeString*)p0)->value) || (self->class->box_kind == 6 && ((struct instance_kernel__Pointer*)self)->value == ((struct instance_kernel__Pointer*)p0)->value)));
 var1 = var3;
 goto RET_LABEL2;
 RET_LABEL2:(void)0;
@@ -54,8 +54,16 @@ short int kernel__Object___61d_61d(val* self, val* p0) {
 short int var /* : Bool */;
 val* var_other /* var other: nullable Object */;
 short int var1 /* : Bool */;
+short int var3 /* : Bool */;
 var_other = p0;
-var1 = self == var_other || (var_other != NULL && self->class == var_other->class && ((self->class->box_kind == 1 && ((struct instance_kernel__Int*)self)->value == ((struct instance_kernel__Int*)var_other)->value) || (self->class->box_kind == 2 && ((struct instance_kernel__Bool*)self)->value == ((struct instance_kernel__Bool*)var_other)->value) || (self->class->box_kind == 3 && ((struct instance_kernel__Char*)self)->value == ((struct instance_kernel__Char*)var_other)->value) || (self->class->box_kind == 4 && ((struct instance_kernel__Float*)self)->value == ((struct instance_kernel__Float*)var_other)->value) || (self->class->box_kind == 5 && ((struct instance_string__NativeString*)self)->value == ((struct instance_string__NativeString*)var_other)->value) || (self->class->box_kind == 6 && ((struct instance_kernel__Pointer*)self)->value == ((struct instance_kernel__Pointer*)var_other)->value)));
+{
+{ /* Inline kernel#Object#is_same_instance (self,var_other) on <self:Object> */
+var3 = self == var_other || (var_other != NULL && self->class == var_other->class && ((self->class->box_kind == 1 && ((struct instance_kernel__Int*)self)->value == ((struct instance_kernel__Int*)var_other)->value) || (self->class->box_kind == 2 && ((struct instance_kernel__Bool*)self)->value == ((struct instance_kernel__Bool*)var_other)->value) || (self->class->box_kind == 3 && ((struct instance_kernel__Char*)self)->value == ((struct instance_kernel__Char*)var_other)->value) || (self->class->box_kind == 4 && ((struct instance_kernel__Float*)self)->value == ((struct instance_kernel__Float*)var_other)->value) || (self->class->box_kind == 5 && ((struct instance_string__NativeString*)self)->value == ((struct instance_string__NativeString*)var_other)->value) || (self->class->box_kind == 6 && ((struct instance_kernel__Pointer*)self)->value == ((struct instance_kernel__Pointer*)var_other)->value)));
+var1 = var3;
+goto RET_LABEL2;
+RET_LABEL2:(void)0;
+}
+}
 var = var1;
 goto RET_LABEL;
 RET_LABEL:;
@@ -65,7 +73,23 @@ return var;
 short int VIRTUAL_kernel__Object___61d_61d(val* self, val* p0) {
 short int var /* : Bool */;
 short int var1 /* : Bool */;
-var1 = kernel__Object___61d_61d(self, p0);
+val* var_other /* var other: nullable Object */;
+short int var3 /* : Bool */;
+short int var5 /* : Bool */;
+{ /* Inline kernel#Object#== (self,p0) on <self:Object> */
+var_other = p0;
+{
+{ /* Inline kernel#Object#is_same_instance (self,var_other) on <self:Object> */
+var5 = self == var_other || (var_other != NULL && self->class == var_other->class && ((self->class->box_kind == 1 && ((struct instance_kernel__Int*)self)->value == ((struct instance_kernel__Int*)var_other)->value) || (self->class->box_kind == 2 && ((struct instance_kernel__Bool*)self)->value == ((struct instance_kernel__Bool*)var_other)->value) || (self->class->box_kind == 3 && ((struct instance_kernel__Char*)self)->value == ((struct instance_kernel__Char*)var_other)->value) || (self->class->box_kind == 4 && ((struct instance_kernel__Float*)self)->value == ((struct instance_kernel__Float*)var_other)->value) || (self->class->box_kind == 5 && ((struct instance_string__NativeString*)self)->value == ((struct instance_string__NativeString*)var_other)->value) || (self->class->box_kind == 6 && ((struct instance_kernel__Pointer*)self)->value == ((struct instance_kernel__Pointer*)var_other)->value)));
+var3 = var5;
+goto RET_LABEL4;
+RET_LABEL4:(void)0;
+}
+}
+var1 = var3;
+goto RET_LABEL2;
+RET_LABEL2:(void)0;
+}
 var = var1;
 RET_LABEL:;
 return var;
@@ -76,10 +100,14 @@ short int var /* : Bool */;
 val* var_other /* var other: nullable Object */;
 short int var1 /* : Bool */;
 short int var2 /* : Bool */;
+short int var3 /* : Bool */;
 var_other = p0;
-var1 = ((short int (*)(val*, val*))(self->class->vft[COLOR_kernel__Object___61d_61d]))(self, var_other) /* == on <self:Object>*/;
-var2 = !var1;
-var = var2;
+{
+var2 = ((short int (*)(val*, val*))(self->class->vft[COLOR_kernel__Object___61d_61d]))(self, var_other) /* == on <self:Object>*/;
+var1 = var2;
+}
+var3 = !var1;
+var = var3;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
@@ -88,54 +116,70 @@ return var;
 short int VIRTUAL_kernel__Object___33d_61d(val* self, val* p0) {
 short int var /* : Bool */;
 short int var1 /* : Bool */;
-var1 = kernel__Object___33d_61d(self, p0);
+val* var_other /* var other: nullable Object */;
+short int var3 /* : Bool */;
+short int var4 /* : Bool */;
+short int var5 /* : Bool */;
+{ /* Inline kernel#Object#!= (self,p0) on <self:Object> */
+var_other = p0;
+{
+var4 = ((short int (*)(val*, val*))(self->class->vft[COLOR_kernel__Object___61d_61d]))(self, var_other) /* == on <self:Object>*/;
+var3 = var4;
+}
+var5 = !var3;
+var1 = var5;
+goto RET_LABEL2;
+RET_LABEL2:(void)0;
+}
 var = var1;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Object#output for (self: Object) */
-void kernel__Object__output(val* self) {
-char var /* : Char */;
+/* method kernel#Object#hash for (self: Object): Int */
+long kernel__Object__hash(val* self) {
+long var /* : Int */;
+long var1 /* : Int */;
 long var2 /* : Int */;
-char var4 /* : Char */;
-var = '<';
-{ /* Inline kernel#Char#output (var) */
-printf("%c", var);
-RET_LABEL1:(void)0;
-}
-var2 = ((long (*)(val*))(self->class->vft[COLOR_kernel__Object__object_id]))(self) /* object_id on <self:Object>*/;
-{ /* Inline kernel#Int#output (var2) */
-printf("%ld\n", var2);
-RET_LABEL3:(void)0;
+long var3 /* : Int */;
+short int var5 /* : Bool */;
+int cltype;
+int idtype;
+const char* var_class_name;
+long var6 /* : Int */;
+{
+var1 = ((long (*)(val*))(self->class->vft[COLOR_kernel__Object__object_id]))(self) /* object_id on <self:Object>*/;
 }
-var4 = '>';
-{ /* Inline kernel#Char#output (var4) */
-printf("%c", var4);
-RET_LABEL5:(void)0;
+var2 = 8;
+{
+{ /* Inline kernel#Int#/ (var1,var2) on <var1:Int> */
+/* Covariant cast for argument 0 (i) <var2:Int> isa OTHER */
+/* <var2:Int> isa OTHER */
+var5 = 1; /* easy <var2:Int> isa OTHER*/
+if (unlikely(!var5)) {
+var_class_name = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 379);
+show_backtrace(1);
 }
-RET_LABEL:;
+var6 = var1 / var2;
+var3 = var6;
+goto RET_LABEL4;
+RET_LABEL4:(void)0;
 }
-/* method kernel#Object#output for (self: Object) */
-void VIRTUAL_kernel__Object__output(val* self) {
-kernel__Object__output(self);
-RET_LABEL:;
 }
-/* method kernel#Object#output_class_name for (self: Object) */
-void kernel__Object__output_class_name(val* self) {
-const char* var_class_name;
-var_class_name = self == NULL ? "null" : self->type->name;
-printf("%s\n", var_class_name);
+var = var3;
+goto RET_LABEL;
 RET_LABEL:;
+return var;
 }
-/* method kernel#Object#output_class_name for (self: Object) */
-void VIRTUAL_kernel__Object__output_class_name(val* self) {
-const char* var_class_name;
-{ /* Inline kernel#Object#output_class_name (self) */
-var_class_name = self == NULL ? "null" : self->type->name;
-printf("%s\n", var_class_name);
-RET_LABEL1:(void)0;
-}
+/* method kernel#Object#hash for (self: Object): Int */
+long VIRTUAL_kernel__Object__hash(val* self) {
+long var /* : Int */;
+long var1 /* : Int */;
+var1 = kernel__Object__hash(self);
+var = var1;
 RET_LABEL:;
+return var;
 }
 /* method kernel#Object#exit for (self: Object, Int) */
 void kernel__Object__exit(val* self, long p0) {
@@ -144,7 +188,7 @@ RET_LABEL:;
 }
 /* method kernel#Object#exit for (self: Object, Int) */
 void VIRTUAL_kernel__Object__exit(val* self, long p0) {
-{ /* Inline kernel#Object#exit (self,p0) */
+{ /* Inline kernel#Object#exit (self,p0) on <self:Object> */
 exit(p0);
 RET_LABEL1:(void)0;
 }
@@ -165,7 +209,7 @@ val* VIRTUAL_kernel__Object__sys(val* self) {
 val* var /* : Sys */;
 val* var1 /* : Sys */;
 val* var3 /* : Sys */;
-{ /* Inline kernel#Object#sys (self) */
+{ /* Inline kernel#Object#sys (self) on <self:Object> */
 var3 = glob_sys;
 var1 = var3;
 goto RET_LABEL2;
@@ -175,84 +219,56 @@ var = var1;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Object#hash for (self: Object): Int */
-long kernel__Object__hash(val* self) {
-long var /* : Int */;
-long var1 /* : Int */;
-long var2 /* : Int */;
-long var3 /* : Int */;
-long var5 /* : Int */;
-var1 = ((long (*)(val*))(self->class->vft[COLOR_kernel__Object__object_id]))(self) /* object_id on <self:Object>*/;
-var2 = 8;
-{ /* Inline kernel#Int#/ (var1,var2) */
-var5 = var1 / var2;
-var3 = var5;
-goto RET_LABEL4;
-RET_LABEL4:(void)0;
-}
-var = var3;
-goto RET_LABEL;
+/* method kernel#Object#init for (self: Object) */
+void kernel__Object__init(val* self) {
 RET_LABEL:;
-return var;
 }
-/* method kernel#Object#hash for (self: Object): Int */
-long VIRTUAL_kernel__Object__hash(val* self) {
-long var /* : Int */;
-long var1 /* : Int */;
-var1 = kernel__Object__hash(self);
-var = var1;
-RET_LABEL:;
-return var;
+/* method kernel#Object#init for (self: Object) */
+void VIRTUAL_kernel__Object__init(val* self) {
+{ /* Inline kernel#Object#init (self) on <self:Object> */
+RET_LABEL1:(void)0;
 }
-/* method kernel#Sys#main for (self: Sys) */
-void kernel__Sys__main(val* self) {
 RET_LABEL:;
 }
-/* method kernel#Sys#main for (self: Object) */
-void VIRTUAL_kernel__Sys__main(val* self) {
-kernel__Sys__main(self);
-RET_LABEL:;
+/* method kernel#Sys#run for (self: Sys) */
+void kernel__Sys__run(val* self) {
+{
+abstract_compiler__Sys__main(self); /* Direct call abstract_compiler#Sys#main on <self:Sys>*/
 }
-/* method kernel#Sys#init for (self: Sys) */
-void kernel__Sys__init(val* self) {
 RET_LABEL:;
 }
-/* method kernel#Sys#init for (self: Object) */
-void VIRTUAL_kernel__Sys__init(val* self) {
-kernel__Sys__init(self);
+/* method kernel#Sys#run for (self: Object) */
+void VIRTUAL_kernel__Sys__run(val* self) {
+kernel__Sys__run(self); /* Direct call kernel#Sys#run on <self:Object(Sys)>*/
 RET_LABEL:;
 }
-/* method kernel#Comparable#< for (self: Comparable, Comparable): Bool */
-short int kernel__Comparable___60d(val* self, val* p0) {
-short int var /* : Bool */;
-short int var1 /* : Bool */;
-int cltype;
-int idtype;
-const struct type* type_struct;
-/* Covariant cast for argument 0 (other) <p0:Comparable> isa OTHER */
-/* <p0:Comparable> isa OTHER */
-type_struct = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
-cltype = type_struct->color;
-idtype = type_struct->id;
-if(cltype >= p0->type->table_size) {
-var1 = 0;
-} else {
-var1 = p0->type->type_table[cltype] == idtype;
-}
-if (!var1) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 95);
-exit(1);
-}
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Deferred method called", "lib/standard/kernel.nit", 95);
-exit(1);
+/* method kernel#Sys#errno for (self: Sys): Int */
+long kernel__Sys__errno(val* self) {
+long var /* : Int */;
+long var1 /* : Int */;
+struct nitni_instance* var_for_c_0;
+var_for_c_0 = nit_alloc(sizeof(struct nitni_instance));
+var_for_c_0->value = self;
+var1 = kernel___Sys_errno___impl(var_for_c_0);
+var = var1;
+goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Comparable#< for (self: Object, Comparable): Bool */
-short int VIRTUAL_kernel__Comparable___60d(val* self, val* p0) {
-short int var /* : Bool */;
-short int var1 /* : Bool */;
-var1 = kernel__Comparable___60d(self, p0);
+/* method kernel#Sys#errno for (self: Object): Int */
+long VIRTUAL_kernel__Sys__errno(val* self) {
+long var /* : Int */;
+long var1 /* : Int */;
+long var3 /* : Int */;
+{ /* Inline kernel#Sys#errno (self) on <self:Object(Sys)> */
+struct nitni_instance* var_for_c_0;
+var_for_c_0 = nit_alloc(sizeof(struct nitni_instance));
+var_for_c_0->value = self;
+var3 = kernel___Sys_errno___impl(var_for_c_0);
+var1 = var3;
+goto RET_LABEL2;
+RET_LABEL2:(void)0;
+}
 var = var1;
 RET_LABEL:;
 return var;
@@ -264,6 +280,7 @@ short int var1 /* : Bool */;
 int cltype;
 int idtype;
 const struct type* type_struct;
+const char* var_class_name;
 val* var_other /* var other: Comparable */;
 short int var2 /* : Bool */;
 short int var3 /* : Bool */;
@@ -277,12 +294,16 @@ var1 = 0;
 } else {
 var1 = p0->type->type_table[cltype] == idtype;
 }
-if (!var1) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 98);
-exit(1);
+if (unlikely(!var1)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 117);
+show_backtrace(1);
 }
 var_other = p0;
+{
 var2 = ((short int (*)(val*, val*))(var_other->class->vft[COLOR_kernel__Comparable___60d]))(var_other, self) /* < on <var_other:Comparable>*/;
+}
 var3 = !var2;
 var = var3;
 goto RET_LABEL;
@@ -305,6 +326,7 @@ short int var1 /* : Bool */;
 int cltype;
 int idtype;
 const struct type* type_struct;
+const char* var_class_name;
 val* var_other /* var other: Comparable */;
 short int var2 /* : Bool */;
 short int var3 /* : Bool */;
@@ -318,12 +340,16 @@ var1 = 0;
 } else {
 var1 = p0->type->type_table[cltype] == idtype;
 }
-if (!var1) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 102);
-exit(1);
+if (unlikely(!var1)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 121);
+show_backtrace(1);
 }
 var_other = p0;
+{
 var2 = ((short int (*)(val*, val*))(self->class->vft[COLOR_kernel__Comparable___60d]))(self, var_other) /* < on <self:Comparable>*/;
+}
 var3 = !var2;
 var = var3;
 goto RET_LABEL;
@@ -346,6 +372,7 @@ short int var1 /* : Bool */;
 int cltype;
 int idtype;
 const struct type* type_struct;
+const char* var_class_name;
 val* var_other /* var other: Comparable */;
 short int var2 /* : Bool */;
 /* Covariant cast for argument 0 (other) <p0:Comparable> isa OTHER */
@@ -358,12 +385,16 @@ var1 = 0;
 } else {
 var1 = p0->type->type_table[cltype] == idtype;
 }
-if (!var1) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 106);
-exit(1);
+if (unlikely(!var1)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 125);
+show_backtrace(1);
 }
 var_other = p0;
+{
 var2 = ((short int (*)(val*, val*))(var_other->class->vft[COLOR_kernel__Comparable___60d]))(var_other, self) /* < on <var_other:Comparable>*/;
+}
 var = var2;
 goto RET_LABEL;
 RET_LABEL:;
@@ -385,6 +416,7 @@ short int var1 /* : Bool */;
 int cltype;
 int idtype;
 const struct type* type_struct;
+const char* var_class_name;
 val* var_other /* var other: Comparable */;
 short int var2 /* : Bool */;
 long var3 /* : Int */;
@@ -403,24 +435,32 @@ var1 = 0;
 } else {
 var1 = p0->type->type_table[cltype] == idtype;
 }
-if (!var1) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 109);
-exit(1);
+if (unlikely(!var1)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 128);
+show_backtrace(1);
 }
 var_other = p0;
+{
 var2 = ((short int (*)(val*, val*))(self->class->vft[COLOR_kernel__Comparable___60d]))(self, var_other) /* < on <self:Comparable>*/;
+}
 if (var2){
 var3 = 1;
-{ /* Inline kernel#Int#unary - (var3) */
+{
+{ /* Inline kernel#Int#unary - (var3) on <var3:Int> */
 var6 = -var3;
 var4 = var6;
 goto RET_LABEL5;
 RET_LABEL5:(void)0;
 }
+}
 var = var4;
 goto RET_LABEL;
 } else {
+{
 var7 = ((short int (*)(val*, val*))(var_other->class->vft[COLOR_kernel__Comparable___60d]))(var_other, self) /* < on <var_other:Comparable>*/;
+}
 if (var7){
 var8 = 1;
 var = var8;
@@ -443,425 +483,167 @@ var = var1;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Comparable#is_between for (self: Comparable, Comparable, Comparable): Bool */
-short int kernel__Comparable__is_between(val* self, val* p0, val* p1) {
-short int var /* : Bool */;
-short int var1 /* : Bool */;
-int cltype;
-int idtype;
-const struct type* type_struct;
-short int var2 /* : Bool */;
-int cltype3;
-int idtype4;
-const struct type* type_struct5;
-val* var_c /* var c: Comparable */;
-val* var_d /* var d: Comparable */;
-short int var6 /* : Bool */;
-short int var7 /* : Bool */;
-short int var_ /* var : Bool */;
-short int var8 /* : Bool */;
-/* Covariant cast for argument 0 (c) <p0:Comparable> isa OTHER */
-/* <p0:Comparable> isa OTHER */
-type_struct = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
-cltype = type_struct->color;
-idtype = type_struct->id;
-if(cltype >= p0->type->table_size) {
-var1 = 0;
-} else {
-var1 = p0->type->type_table[cltype] == idtype;
-}
-if (!var1) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 122);
-exit(1);
+/* method kernel#Bool#object_id for (self: Bool): Int */
+long kernel__Bool__object_id(short int self) {
+long var /* : Int */;
+long var1 /* : Int */;
+var1 = (long)self;
+var = var1;
+goto RET_LABEL;
+RET_LABEL:;
+return var;
 }
-/* Covariant cast for argument 1 (d) <p1:Comparable> isa OTHER */
-/* <p1:Comparable> isa OTHER */
-type_struct5 = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
-cltype3 = type_struct5->color;
-idtype4 = type_struct5->id;
-if(cltype3 >= p1->type->table_size) {
-var2 = 0;
-} else {
-var2 = p1->type->type_table[cltype3] == idtype4;
+/* method kernel#Bool#object_id for (self: Object): Int */
+long VIRTUAL_kernel__Bool__object_id(val* self) {
+long var /* : Int */;
+long var1 /* : Int */;
+short int var3 /* : Bool */;
+long var4 /* : Int */;
+{ /* Inline kernel#Bool#object_id (self) on <self:Object(Bool)> */
+var3 = ((struct instance_kernel__Bool*)self)->value; /* autounbox from Object to Bool */;
+var4 = (long)var3;
+var1 = var4;
+goto RET_LABEL2;
+RET_LABEL2:(void)0;
 }
-if (!var2) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 122);
-exit(1);
+var = var1;
+RET_LABEL:;
+return var;
 }
-var_c = p0;
-var_d = p1;
-var7 = ((short int (*)(val*, val*))(var_c->class->vft[COLOR_kernel__Comparable___60d_61d]))(var_c, self) /* <= on <var_c:Comparable>*/;
-var_ = var7;
-if (var7){
-var8 = ((short int (*)(val*, val*))(self->class->vft[COLOR_kernel__Comparable___60d_61d]))(self, var_d) /* <= on <self:Comparable>*/;
-var6 = var8;
-} else {
-var6 = var_;
+/* method kernel#Bool#== for (self: Bool, nullable Object): Bool */
+short int kernel__Bool___61d_61d(short int self, val* p0) {
+short int var /* : Bool */;
+short int var1 /* : Bool */;
+short int var2 /* : Bool */;
+var1 = (p0 != NULL) && (p0->class == &class_kernel__Bool);
+if (var1) {
+var2 = ((struct instance_kernel__Bool*)p0)->value; /* autounbox from nullable Object to Bool */;
+var1 = (var2 == self);
 }
-var = var6;
+var = var1;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Comparable#is_between for (self: Object, Comparable, Comparable): Bool */
-short int VIRTUAL_kernel__Comparable__is_between(val* self, val* p0, val* p1) {
+/* method kernel#Bool#== for (self: Object, nullable Object): Bool */
+short int VIRTUAL_kernel__Bool___61d_61d(val* self, val* p0) {
 short int var /* : Bool */;
 short int var1 /* : Bool */;
-var1 = kernel__Comparable__is_between(self, p0, p1);
+short int var3 /* : Bool */;
+{ /* Inline kernel#Bool#== (self,p0) on <self:Object(Bool)> */
+var3 = self == p0 || (p0 != NULL && self->class == p0->class && ((struct instance_kernel__Bool*)self)->value == ((struct instance_kernel__Bool*)p0)->value);
+var1 = var3;
+goto RET_LABEL2;
+RET_LABEL2:(void)0;
+}
 var = var1;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Comparable#max for (self: Comparable, Comparable): Comparable */
-val* kernel__Comparable__max(val* self, val* p0) {
-val* var /* : Comparable */;
+/* method kernel#Bool#!= for (self: Bool, nullable Object): Bool */
+short int kernel__Bool___33d_61d(short int self, val* p0) {
+short int var /* : Bool */;
 short int var1 /* : Bool */;
-int cltype;
-int idtype;
-const struct type* type_struct;
-val* var_other /* var other: Comparable */;
 short int var2 /* : Bool */;
 short int var3 /* : Bool */;
-int cltype4;
-int idtype5;
-const struct type* type_struct6;
-/* Covariant cast for argument 0 (other) <p0:Comparable> isa OTHER */
-/* <p0:Comparable> isa OTHER */
-type_struct = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
-cltype = type_struct->color;
-idtype = type_struct->id;
-if(cltype >= p0->type->table_size) {
-var1 = 0;
-} else {
-var1 = p0->type->type_table[cltype] == idtype;
-}
-if (!var1) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 128);
-exit(1);
+var1 = (p0 != NULL) && (p0->class == &class_kernel__Bool);
+if (var1) {
+var2 = ((struct instance_kernel__Bool*)p0)->value; /* autounbox from nullable Object to Bool */;
+var1 = (var2 == self);
 }
-var_other = p0;
-var2 = ((short int (*)(val*, val*))(self->class->vft[COLOR_kernel__Comparable___60d]))(self, var_other) /* < on <self:Comparable>*/;
-if (var2){
-var = var_other;
+var3 = !var1;
+var = var3;
 goto RET_LABEL;
-} else {
-/* <self:Comparable> isa OTHER */
-type_struct6 = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
-cltype4 = type_struct6->color;
-idtype5 = type_struct6->id;
-if(cltype4 >= self->type->table_size) {
-var3 = 0;
-} else {
-var3 = self->type->type_table[cltype4] == idtype5;
-}
-if (!var3) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 134);
-exit(1);
+RET_LABEL:;
+return var;
 }
-var = self;
-goto RET_LABEL;
+/* method kernel#Bool#!= for (self: Object, nullable Object): Bool */
+short int VIRTUAL_kernel__Bool___33d_61d(val* self, val* p0) {
+short int var /* : Bool */;
+short int var1 /* : Bool */;
+short int var3 /* : Bool */;
+short int var4 /* : Bool */;
+{ /* Inline kernel#Bool#!= (self,p0) on <self:Object(Bool)> */
+var3 = self == p0 || (p0 != NULL && self->class == p0->class && ((struct instance_kernel__Bool*)self)->value == ((struct instance_kernel__Bool*)p0)->value);
+var4 = !var3;
+var1 = var4;
+goto RET_LABEL2;
+RET_LABEL2:(void)0;
 }
+var = var1;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Comparable#max for (self: Object, Comparable): Comparable */
-val* VIRTUAL_kernel__Comparable__max(val* self, val* p0) {
-val* var /* : Comparable */;
-val* var1 /* : Comparable */;
-var1 = kernel__Comparable__max(self, p0);
+/* method kernel#Bool#hash for (self: Bool): Int */
+long kernel__Bool__hash(short int self) {
+long var /* : Int */;
+long var1 /* : Int */;
+{
+var1 = kernel__Bool__to_i(self);
+}
 var = var1;
+goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Comparable#min for (self: Comparable, Comparable): Comparable */
-val* kernel__Comparable__min(val* self, val* p0) {
-val* var /* : Comparable */;
-short int var1 /* : Bool */;
-int cltype;
-int idtype;
-const struct type* type_struct;
-val* var_c /* var c: Comparable */;
+/* method kernel#Bool#hash for (self: Object): Int */
+long VIRTUAL_kernel__Bool__hash(val* self) {
+long var /* : Int */;
+long var1 /* : Int */;
 short int var2 /* : Bool */;
-short int var3 /* : Bool */;
-int cltype4;
-int idtype5;
-const struct type* type_struct6;
-/* Covariant cast for argument 0 (c) <p0:Comparable> isa OTHER */
-/* <p0:Comparable> isa OTHER */
-type_struct = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
-cltype = type_struct->color;
-idtype = type_struct->id;
-if(cltype >= p0->type->table_size) {
-var1 = 0;
-} else {
-var1 = p0->type->type_table[cltype] == idtype;
-}
-if (!var1) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 138);
-exit(1);
-}
-var_c = p0;
-var2 = ((short int (*)(val*, val*))(var_c->class->vft[COLOR_kernel__Comparable___60d]))(var_c, self) /* < on <var_c:Comparable>*/;
-if (var2){
-var = var_c;
-goto RET_LABEL;
-} else {
-/* <self:Comparable> isa OTHER */
-type_struct6 = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
-cltype4 = type_struct6->color;
-idtype5 = type_struct6->id;
-if(cltype4 >= self->type->table_size) {
-var3 = 0;
-} else {
-var3 = self->type->type_table[cltype4] == idtype5;
-}
-if (!var3) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 144);
-exit(1);
-}
-var = self;
-goto RET_LABEL;
-}
-RET_LABEL:;
-return var;
-}
-/* method kernel#Comparable#min for (self: Object, Comparable): Comparable */
-val* VIRTUAL_kernel__Comparable__min(val* self, val* p0) {
-val* var /* : Comparable */;
-val* var1 /* : Comparable */;
-var1 = kernel__Comparable__min(self, p0);
+var2 = ((struct instance_kernel__Bool*)self)->value; /* autounbox from Object to Bool */;
+var1 = kernel__Bool__hash(var2);
 var = var1;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Discrete#succ for (self: Discrete): Discrete */
-val* kernel__Discrete__succ(val* self) {
-val* var /* : Discrete */;
+/* method kernel#Bool#to_i for (self: Bool): Int */
+long kernel__Bool__to_i(short int self) {
+long var /* : Int */;
 long var1 /* : Int */;
-val* var2 /* : Discrete */;
+long var2 /* : Int */;
+if (self){
 var1 = 1;
-var2 = ((val* (*)(val*, long))(self->class->vft[COLOR_kernel__Discrete___43d]))(self, var1) /* + on <self:Discrete>*/;
-var = var2;
-goto RET_LABEL;
-RET_LABEL:;
-return var;
-}
-/* method kernel#Discrete#succ for (self: Object): Discrete */
-val* VIRTUAL_kernel__Discrete__succ(val* self) {
-val* var /* : Discrete */;
-val* var1 /* : Discrete */;
-var1 = kernel__Discrete__succ(self);
 var = var1;
-RET_LABEL:;
-return var;
-}
-/* method kernel#Discrete#prec for (self: Discrete): Discrete */
-val* kernel__Discrete__prec(val* self) {
-val* var /* : Discrete */;
-long var1 /* : Int */;
-val* var2 /* : Discrete */;
-var1 = 1;
-var2 = ((val* (*)(val*, long))(self->class->vft[COLOR_kernel__Discrete___45d]))(self, var1) /* - on <self:Discrete>*/;
-var = var2;
 goto RET_LABEL;
-RET_LABEL:;
-return var;
-}
-/* method kernel#Discrete#prec for (self: Object): Discrete */
-val* VIRTUAL_kernel__Discrete__prec(val* self) {
-val* var /* : Discrete */;
-val* var1 /* : Discrete */;
-var1 = kernel__Discrete__prec(self);
-var = var1;
-RET_LABEL:;
-return var;
-}
-/* method kernel#Discrete#+ for (self: Discrete, Int): Discrete */
-val* kernel__Discrete___43d(val* self, long p0) {
-val* var /* : Discrete */;
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Deferred method called", "lib/standard/kernel.nit", 161);
-exit(1);
-RET_LABEL:;
-return var;
-}
-/* method kernel#Discrete#+ for (self: Object, Int): Discrete */
-val* VIRTUAL_kernel__Discrete___43d(val* self, long p0) {
-val* var /* : Discrete */;
-val* var1 /* : Discrete */;
-var1 = kernel__Discrete___43d(self, p0);
-var = var1;
-RET_LABEL:;
-return var;
-}
-/* method kernel#Discrete#- for (self: Discrete, Int): Discrete */
-val* kernel__Discrete___45d(val* self, long p0) {
-val* var /* : Discrete */;
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Deferred method called", "lib/standard/kernel.nit", 164);
-exit(1);
-RET_LABEL:;
-return var;
-}
-/* method kernel#Discrete#- for (self: Object, Int): Discrete */
-val* VIRTUAL_kernel__Discrete___45d(val* self, long p0) {
-val* var /* : Discrete */;
-val* var1 /* : Discrete */;
-var1 = kernel__Discrete___45d(self, p0);
-var = var1;
-RET_LABEL:;
-return var;
-}
-/* method kernel#Discrete#distance for (self: Discrete, Discrete): Int */
-long kernel__Discrete__distance(val* self, val* p0) {
-long var /* : Int */;
-short int var1 /* : Bool */;
-int cltype;
-int idtype;
-const struct type* type_struct;
-val* var_d /* var d: Discrete */;
-short int var2 /* : Bool */;
-short int var3 /* : Bool */;
-int cltype4;
-int idtype5;
-const struct type* type_struct6;
-val* var_cursor /* var cursor: Discrete */;
-val* var_stop /* var stop: Discrete */;
-short int var7 /* : Bool */;
-short int var8 /* : Bool */;
-int cltype9;
-int idtype10;
-const struct type* type_struct11;
-long var12 /* : Int */;
-long var13 /* : Int */;
-long var_nb /* var nb: Int */;
-short int var14 /* : Bool */;
-val* var15 /* : Discrete */;
-short int var16 /* : Bool */;
-int cltype17;
-int idtype18;
-const struct type* type_struct19;
-long var20 /* : Int */;
-long var21 /* : Int */;
-long var23 /* : Int */;
-/* Covariant cast for argument 0 (d) <p0:Discrete> isa OTHER */
-/* <p0:Discrete> isa OTHER */
-type_struct = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
-cltype = type_struct->color;
-idtype = type_struct->id;
-if(cltype >= p0->type->table_size) {
-var1 = 0;
-} else {
-var1 = p0->type->type_table[cltype] == idtype;
-}
-if (!var1) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 167);
-exit(1);
-}
-var_d = p0;
-var2 = ((short int (*)(val*, val*))(self->class->vft[COLOR_kernel__Comparable___60d]))(self, var_d) /* < on <self:Discrete>*/;
-if (var2){
-/* <self:Discrete> isa OTHER */
-type_struct6 = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
-cltype4 = type_struct6->color;
-idtype5 = type_struct6->id;
-if(cltype4 >= self->type->table_size) {
-var3 = 0;
-} else {
-var3 = self->type->type_table[cltype4] == idtype5;
-}
-if (!var3) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 176);
-exit(1);
-}
-var_cursor = self;
-var_stop = var_d;
 } else {
-var7 = ((short int (*)(val*, val*))(self->class->vft[COLOR_kernel__Comparable___62d]))(self, var_d) /* > on <self:Discrete>*/;
-if (var7){
-var_cursor = var_d;
-/* <self:Discrete> isa OTHER */
-type_struct11 = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
-cltype9 = type_struct11->color;
-idtype10 = type_struct11->id;
-if(cltype9 >= self->type->table_size) {
-var8 = 0;
-} else {
-var8 = self->type->type_table[cltype9] == idtype10;
-}
-if (!var8) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 180);
-exit(1);
-}
-var_stop = self;
-} else {
-var12 = 0;
-var = var12;
+var2 = 0;
+var = var2;
 goto RET_LABEL;
 }
-}
-var13 = 0;
-var_nb = var13;
-for(;;) {
-var14 = ((short int (*)(val*, val*))(var_cursor->class->vft[COLOR_kernel__Comparable___60d]))(var_cursor, var_stop) /* < on <var_cursor:Discrete>*/;
-if (!var14) break;
-var15 = ((val* (*)(val*))(var_cursor->class->vft[COLOR_kernel__Discrete__succ]))(var_cursor) /* succ on <var_cursor:Discrete>*/;
-/* <var15:Discrete> isa OTHER */
-type_struct19 = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
-cltype17 = type_struct19->color;
-idtype18 = type_struct19->id;
-if(cltype17 >= var15->type->table_size) {
-var16 = 0;
-} else {
-var16 = var15->type->type_table[cltype17] == idtype18;
-}
-if (!var16) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 187);
-exit(1);
-}
-var_cursor = var15;
-var20 = 1;
-{ /* Inline kernel#Int#+ (var_nb,var20) */
-var23 = var_nb + var20;
-var21 = var23;
-goto RET_LABEL22;
-RET_LABEL22:(void)0;
-}
-var_nb = var21;
-CONTINUE_label: (void)0;
-}
-BREAK_label: (void)0;
-var = var_nb;
-goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Discrete#distance for (self: Object, Discrete): Int */
-long VIRTUAL_kernel__Discrete__distance(val* self, val* p0) {
+/* method kernel#Bool#to_i for (self: Object): Int */
+long VIRTUAL_kernel__Bool__to_i(val* self) {
 long var /* : Int */;
 long var1 /* : Int */;
-var1 = kernel__Discrete__distance(self, p0);
+short int var2 /* : Bool */;
+var2 = ((struct instance_kernel__Bool*)self)->value; /* autounbox from Object to Bool */;
+var1 = kernel__Bool__to_i(var2);
 var = var1;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Bool#object_id for (self: Bool): Int */
-long kernel__Bool__object_id(short int self) {
+/* method kernel#Float#object_id for (self: Float): Int */
+long kernel__Float__object_id(double self) {
 long var /* : Int */;
 long var1 /* : Int */;
-var1 = (long)self;
+var1 = (double)self;
 var = var1;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Bool#object_id for (self: Object): Int */
-long VIRTUAL_kernel__Bool__object_id(val* self) {
+/* method kernel#Float#object_id for (self: Object): Int */
+long VIRTUAL_kernel__Float__object_id(val* self) {
 long var /* : Int */;
 long var1 /* : Int */;
-short int var3 /* : Bool */;
+double var3 /* : Float */;
 long var4 /* : Int */;
-{ /* Inline kernel#Bool#object_id (self) */
-var3 = ((struct instance_kernel__Bool*)self)->value; /* autounbox from Object to Bool */;
-var4 = (long)var3;
+{ /* Inline kernel#Float#object_id (self) on <self:Object(Float)> */
+var3 = ((struct instance_kernel__Float*)self)->value; /* autounbox from Object to Float */;
+var4 = (double)var3;
 var1 = var4;
 goto RET_LABEL2;
 RET_LABEL2:(void)0;
@@ -870,14 +652,14 @@ var = var1;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Bool#== for (self: Bool, nullable Object): Bool */
-short int kernel__Bool___61d_61d(short int self, val* p0) {
+/* method kernel#Float#== for (self: Float, nullable Object): Bool */
+short int kernel__Float___61d_61d(double self, val* p0) {
 short int var /* : Bool */;
 short int var1 /* : Bool */;
-short int var2 /* : Bool */;
-var1 = (p0 != NULL) && (p0->class == &class_kernel__Bool);
+double var2 /* : Float */;
+var1 = (p0 != NULL) && (p0->class == &class_kernel__Float);
 if (var1) {
-var2 = ((struct instance_kernel__Bool*)p0)->value; /* autounbox from nullable Object to Bool */;
+var2 = ((struct instance_kernel__Float*)p0)->value; /* autounbox from nullable Object to Float */;
 var1 = (var2 == self);
 }
 var = var1;
@@ -885,13 +667,13 @@ goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Bool#== for (self: Object, nullable Object): Bool */
-short int VIRTUAL_kernel__Bool___61d_61d(val* self, val* p0) {
+/* method kernel#Float#== for (self: Object, nullable Object): Bool */
+short int VIRTUAL_kernel__Float___61d_61d(val* self, val* p0) {
 short int var /* : Bool */;
 short int var1 /* : Bool */;
 short int var3 /* : Bool */;
-{ /* Inline kernel#Bool#== (self,p0) */
-var3 = self == p0 || (p0 != NULL && self->class == p0->class && ((struct instance_kernel__Bool*)self)->value == ((struct instance_kernel__Bool*)p0)->value);
+{ /* Inline kernel#Float#== (self,p0) on <self:Object(Float)> */
+var3 = self == p0 || (p0 != NULL && self->class == p0->class && ((struct instance_kernel__Float*)self)->value == ((struct instance_kernel__Float*)p0)->value);
 var1 = var3;
 goto RET_LABEL2;
 RET_LABEL2:(void)0;
@@ -900,15 +682,15 @@ var = var1;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Bool#!= for (self: Bool, nullable Object): Bool */
-short int kernel__Bool___33d_61d(short int self, val* p0) {
+/* method kernel#Float#!= for (self: Float, nullable Object): Bool */
+short int kernel__Float___33d_61d(double self, val* p0) {
 short int var /* : Bool */;
 short int var1 /* : Bool */;
-short int var2 /* : Bool */;
+double var2 /* : Float */;
 short int var3 /* : Bool */;
-var1 = (p0 != NULL) && (p0->class == &class_kernel__Bool);
+var1 = (p0 != NULL) && (p0->class == &class_kernel__Float);
 if (var1) {
-var2 = ((struct instance_kernel__Bool*)p0)->value; /* autounbox from nullable Object to Bool */;
+var2 = ((struct instance_kernel__Float*)p0)->value; /* autounbox from nullable Object to Float */;
 var1 = (var2 == self);
 }
 var3 = !var1;
@@ -917,14 +699,14 @@ goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Bool#!= for (self: Object, nullable Object): Bool */
-short int VIRTUAL_kernel__Bool___33d_61d(val* self, val* p0) {
+/* method kernel#Float#!= for (self: Object, nullable Object): Bool */
+short int VIRTUAL_kernel__Float___33d_61d(val* self, val* p0) {
 short int var /* : Bool */;
 short int var1 /* : Bool */;
 short int var3 /* : Bool */;
 short int var4 /* : Bool */;
-{ /* Inline kernel#Bool#!= (self,p0) */
-var3 = self == p0 || (p0 != NULL && self->class == p0->class && ((struct instance_kernel__Bool*)self)->value == ((struct instance_kernel__Bool*)p0)->value);
+{ /* Inline kernel#Float#!= (self,p0) on <self:Object(Float)> */
+var3 = self == p0 || (p0 != NULL && self->class == p0->class && ((struct instance_kernel__Float*)self)->value == ((struct instance_kernel__Float*)p0)->value);
 var4 = !var3;
 var1 = var4;
 goto RET_LABEL2;
@@ -934,111 +716,62 @@ var = var1;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Bool#output for (self: Bool) */
-void kernel__Bool__output(short int self) {
-printf(self?"true\n":"false\n");
-RET_LABEL:;
-}
-/* method kernel#Bool#output for (self: Object) */
-void VIRTUAL_kernel__Bool__output(val* self) {
-short int var /* : Bool */;
-{ /* Inline kernel#Bool#output (self) */
-var = ((struct instance_kernel__Bool*)self)->value; /* autounbox from Object to Bool */;
-printf(var?"true\n":"false\n");
-RET_LABEL1:(void)0;
-}
-RET_LABEL:;
-}
-/* method kernel#Bool#hash for (self: Bool): Int */
-long kernel__Bool__hash(short int self) {
-long var /* : Int */;
-long var1 /* : Int */;
-long var2 /* : Int */;
-if (self){
-var1 = 1;
-var = var1;
-goto RET_LABEL;
-} else {
-var2 = 0;
-var = var2;
-goto RET_LABEL;
-}
-RET_LABEL:;
-return var;
-}
-/* method kernel#Bool#hash for (self: Object): Int */
-long VIRTUAL_kernel__Bool__hash(val* self) {
-long var /* : Int */;
-long var1 /* : Int */;
-short int var2 /* : Bool */;
-var2 = ((struct instance_kernel__Bool*)self)->value; /* autounbox from Object to Bool */;
-var1 = kernel__Bool__hash(var2);
-var = var1;
-RET_LABEL:;
-return var;
-}
-/* method kernel#Float#object_id for (self: Float): Int */
-long kernel__Float__object_id(double self) {
-long var /* : Int */;
-long var1 /* : Int */;
-var1 = (double)self;
-var = var1;
-goto RET_LABEL;
-RET_LABEL:;
-return var;
-}
-/* method kernel#Float#object_id for (self: Object): Int */
-long VIRTUAL_kernel__Float__object_id(val* self) {
-long var /* : Int */;
-long var1 /* : Int */;
-double var3 /* : Float */;
-long var4 /* : Int */;
-{ /* Inline kernel#Float#object_id (self) */
-var3 = ((struct instance_kernel__Float*)self)->value; /* autounbox from Object to Float */;
-var4 = (double)var3;
-var1 = var4;
-goto RET_LABEL2;
-RET_LABEL2:(void)0;
-}
-var = var1;
-RET_LABEL:;
-return var;
-}
-/* method kernel#Float#output for (self: Float) */
-void kernel__Float__output(double self) {
-printf("%f\n", self);
-RET_LABEL:;
-}
-/* method kernel#Float#output for (self: Object) */
-void VIRTUAL_kernel__Float__output(val* self) {
-double var /* : Float */;
-{ /* Inline kernel#Float#output (self) */
-var = ((struct instance_kernel__Float*)self)->value; /* autounbox from Object to Float */;
-printf("%f\n", var);
-RET_LABEL1:(void)0;
-}
-RET_LABEL:;
-}
 /* method kernel#Float#<= for (self: Float, Float): Bool */
 short int kernel__Float___60d_61d(double self, double p0) {
 short int var /* : Bool */;
 short int var1 /* : Bool */;
-var1 = self <= p0;
-var = var1;
+int cltype;
+int idtype;
+const char* var_class_name;
+short int var2 /* : Bool */;
+/* Covariant cast for argument 0 (i) <p0:Float> isa OTHER */
+/* <p0:Float> isa OTHER */
+var1 = 1; /* easy <p0:Float> isa OTHER*/
+if (unlikely(!var1)) {
+var_class_name = type_kernel__Float.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 297);
+show_backtrace(1);
+}
+var2 = self <= p0;
+var = var2;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Float#<= for (self: Object, Float): Bool */
-short int VIRTUAL_kernel__Float___60d_61d(val* self, double p0) {
+/* method kernel#Float#<= for (self: Object, Comparable): Bool */
+short int VIRTUAL_kernel__Float___60d_61d(val* self, val* p0) {
 short int var /* : Bool */;
 short int var1 /* : Bool */;
-double var3 /* : Float */;
-short int var4 /* : Bool */;
-{ /* Inline kernel#Float#<= (self,p0) */
-var3 = ((struct instance_kernel__Float*)self)->value; /* autounbox from Object to Float */;
-var4 = var3 <= p0;
-var1 = var4;
+short int var3 /* : Bool */;
+int cltype;
+int idtype;
+const struct type* type_struct;
+const char* var_class_name;
+double var4 /* : Float */;
+double var5 /* : Float */;
+short int var6 /* : Bool */;
+{ /* Inline kernel#Float#<= (self,p0) on <self:Object(Float)> */
+/* Covariant cast for argument 0 (i) <p0:Comparable> isa OTHER */
+/* <p0:Comparable> isa OTHER */
+type_struct = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
+cltype = type_struct->color;
+idtype = type_struct->id;
+if(cltype >= p0->type->table_size) {
+var3 = 0;
+} else {
+var3 = p0->type->type_table[cltype] == idtype;
+}
+if (unlikely(!var3)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 297);
+show_backtrace(1);
+}
+var4 = ((struct instance_kernel__Float*)self)->value; /* autounbox from Object to Float */;
+var5 = ((struct instance_kernel__Float*)p0)->value; /* autounbox from Comparable to Float */;
+var6 = var4 <= var5;
+var1 = var6;
 goto RET_LABEL2;
 RET_LABEL2:(void)0;
 }
@@ -1050,22 +783,58 @@ return var;
 short int kernel__Float___60d(double self, double p0) {
 short int var /* : Bool */;
 short int var1 /* : Bool */;
-var1 = self < p0;
-var = var1;
+int cltype;
+int idtype;
+const char* var_class_name;
+short int var2 /* : Bool */;
+/* Covariant cast for argument 0 (i) <p0:Float> isa OTHER */
+/* <p0:Float> isa OTHER */
+var1 = 1; /* easy <p0:Float> isa OTHER*/
+if (unlikely(!var1)) {
+var_class_name = type_kernel__Float.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 298);
+show_backtrace(1);
+}
+var2 = self < p0;
+var = var2;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Float#< for (self: Object, Float): Bool */
-short int VIRTUAL_kernel__Float___60d(val* self, double p0) {
+/* method kernel#Float#< for (self: Object, Comparable): Bool */
+short int VIRTUAL_kernel__Float___60d(val* self, val* p0) {
 short int var /* : Bool */;
 short int var1 /* : Bool */;
-double var3 /* : Float */;
-short int var4 /* : Bool */;
-{ /* Inline kernel#Float#< (self,p0) */
-var3 = ((struct instance_kernel__Float*)self)->value; /* autounbox from Object to Float */;
-var4 = var3 < p0;
-var1 = var4;
+short int var3 /* : Bool */;
+int cltype;
+int idtype;
+const struct type* type_struct;
+const char* var_class_name;
+double var4 /* : Float */;
+double var5 /* : Float */;
+short int var6 /* : Bool */;
+{ /* Inline kernel#Float#< (self,p0) on <self:Object(Float)> */
+/* Covariant cast for argument 0 (i) <p0:Comparable> isa OTHER */
+/* <p0:Comparable> isa OTHER */
+type_struct = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
+cltype = type_struct->color;
+idtype = type_struct->id;
+if(cltype >= p0->type->table_size) {
+var3 = 0;
+} else {
+var3 = p0->type->type_table[cltype] == idtype;
+}
+if (unlikely(!var3)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 298);
+show_backtrace(1);
+}
+var4 = ((struct instance_kernel__Float*)self)->value; /* autounbox from Object to Float */;
+var5 = ((struct instance_kernel__Float*)p0)->value; /* autounbox from Comparable to Float */;
+var6 = var4 < var5;
+var1 = var6;
 goto RET_LABEL2;
 RET_LABEL2:(void)0;
 }
@@ -1077,22 +846,58 @@ return var;
 short int kernel__Float___62d_61d(double self, double p0) {
 short int var /* : Bool */;
 short int var1 /* : Bool */;
-var1 = self >= p0;
-var = var1;
+int cltype;
+int idtype;
+const char* var_class_name;
+short int var2 /* : Bool */;
+/* Covariant cast for argument 0 (i) <p0:Float> isa OTHER */
+/* <p0:Float> isa OTHER */
+var1 = 1; /* easy <p0:Float> isa OTHER*/
+if (unlikely(!var1)) {
+var_class_name = type_kernel__Float.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 299);
+show_backtrace(1);
+}
+var2 = self >= p0;
+var = var2;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Float#>= for (self: Object, Float): Bool */
-short int VIRTUAL_kernel__Float___62d_61d(val* self, double p0) {
+/* method kernel#Float#>= for (self: Object, Comparable): Bool */
+short int VIRTUAL_kernel__Float___62d_61d(val* self, val* p0) {
 short int var /* : Bool */;
 short int var1 /* : Bool */;
-double var3 /* : Float */;
-short int var4 /* : Bool */;
-{ /* Inline kernel#Float#>= (self,p0) */
-var3 = ((struct instance_kernel__Float*)self)->value; /* autounbox from Object to Float */;
-var4 = var3 >= p0;
-var1 = var4;
+short int var3 /* : Bool */;
+int cltype;
+int idtype;
+const struct type* type_struct;
+const char* var_class_name;
+double var4 /* : Float */;
+double var5 /* : Float */;
+short int var6 /* : Bool */;
+{ /* Inline kernel#Float#>= (self,p0) on <self:Object(Float)> */
+/* Covariant cast for argument 0 (i) <p0:Comparable> isa OTHER */
+/* <p0:Comparable> isa OTHER */
+type_struct = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
+cltype = type_struct->color;
+idtype = type_struct->id;
+if(cltype >= p0->type->table_size) {
+var3 = 0;
+} else {
+var3 = p0->type->type_table[cltype] == idtype;
+}
+if (unlikely(!var3)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 299);
+show_backtrace(1);
+}
+var4 = ((struct instance_kernel__Float*)self)->value; /* autounbox from Object to Float */;
+var5 = ((struct instance_kernel__Float*)p0)->value; /* autounbox from Comparable to Float */;
+var6 = var4 >= var5;
+var1 = var6;
 goto RET_LABEL2;
 RET_LABEL2:(void)0;
 }
@@ -1104,22 +909,58 @@ return var;
 short int kernel__Float___62d(double self, double p0) {
 short int var /* : Bool */;
 short int var1 /* : Bool */;
-var1 = self > p0;
-var = var1;
+int cltype;
+int idtype;
+const char* var_class_name;
+short int var2 /* : Bool */;
+/* Covariant cast for argument 0 (i) <p0:Float> isa OTHER */
+/* <p0:Float> isa OTHER */
+var1 = 1; /* easy <p0:Float> isa OTHER*/
+if (unlikely(!var1)) {
+var_class_name = type_kernel__Float.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 300);
+show_backtrace(1);
+}
+var2 = self > p0;
+var = var2;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Float#> for (self: Object, Float): Bool */
-short int VIRTUAL_kernel__Float___62d(val* self, double p0) {
+/* method kernel#Float#> for (self: Object, Comparable): Bool */
+short int VIRTUAL_kernel__Float___62d(val* self, val* p0) {
 short int var /* : Bool */;
 short int var1 /* : Bool */;
-double var3 /* : Float */;
-short int var4 /* : Bool */;
-{ /* Inline kernel#Float#> (self,p0) */
-var3 = ((struct instance_kernel__Float*)self)->value; /* autounbox from Object to Float */;
-var4 = var3 > p0;
-var1 = var4;
+short int var3 /* : Bool */;
+int cltype;
+int idtype;
+const struct type* type_struct;
+const char* var_class_name;
+double var4 /* : Float */;
+double var5 /* : Float */;
+short int var6 /* : Bool */;
+{ /* Inline kernel#Float#> (self,p0) on <self:Object(Float)> */
+/* Covariant cast for argument 0 (i) <p0:Comparable> isa OTHER */
+/* <p0:Comparable> isa OTHER */
+type_struct = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
+cltype = type_struct->color;
+idtype = type_struct->id;
+if(cltype >= p0->type->table_size) {
+var3 = 0;
+} else {
+var3 = p0->type->type_table[cltype] == idtype;
+}
+if (unlikely(!var3)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 300);
+show_backtrace(1);
+}
+var4 = ((struct instance_kernel__Float*)self)->value; /* autounbox from Object to Float */;
+var5 = ((struct instance_kernel__Float*)p0)->value; /* autounbox from Comparable to Float */;
+var6 = var4 > var5;
+var1 = var6;
 goto RET_LABEL2;
 RET_LABEL2:(void)0;
 }
@@ -1130,27 +971,65 @@ return var;
 /* method kernel#Float#+ for (self: Float, Float): Float */
 double kernel__Float___43d(double self, double p0) {
 double var /* : Float */;
-double var1 /* : Float */;
-var1 = self + p0;
-var = var1;
+short int var1 /* : Bool */;
+int cltype;
+int idtype;
+const char* var_class_name;
+double var2 /* : Float */;
+/* Covariant cast for argument 0 (i) <p0:Float> isa OTHER */
+/* <p0:Float> isa OTHER */
+var1 = 1; /* easy <p0:Float> isa OTHER*/
+if (unlikely(!var1)) {
+var_class_name = type_kernel__Float.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 302);
+show_backtrace(1);
+}
+var2 = self + p0;
+var = var2;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Float#+ for (self: Object, Float): Float */
-double VIRTUAL_kernel__Float___43d(val* self, double p0) {
-double var /* : Float */;
+/* method kernel#Float#+ for (self: Object, Numeric): Numeric */
+val* VIRTUAL_kernel__Float___43d(val* self, val* p0) {
+val* var /* : Numeric */;
 double var1 /* : Float */;
-double var3 /* : Float */;
+short int var3 /* : Bool */;
+int cltype;
+int idtype;
+const struct type* type_struct;
+const char* var_class_name;
 double var4 /* : Float */;
-{ /* Inline kernel#Float#+ (self,p0) */
-var3 = ((struct instance_kernel__Float*)self)->value; /* autounbox from Object to Float */;
-var4 = var3 + p0;
-var1 = var4;
+double var5 /* : Float */;
+double var6 /* : Float */;
+val* var7 /* : Numeric */;
+{ /* Inline kernel#Float#+ (self,p0) on <self:Object(Float)> */
+/* Covariant cast for argument 0 (i) <p0:Numeric> isa OTHER */
+/* <p0:Numeric> isa OTHER */
+type_struct = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
+cltype = type_struct->color;
+idtype = type_struct->id;
+if(cltype >= p0->type->table_size) {
+var3 = 0;
+} else {
+var3 = p0->type->type_table[cltype] == idtype;
+}
+if (unlikely(!var3)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 302);
+show_backtrace(1);
+}
+var4 = ((struct instance_kernel__Float*)self)->value; /* autounbox from Object to Float */;
+var5 = ((struct instance_kernel__Float*)p0)->value; /* autounbox from Numeric to Float */;
+var6 = var4 + var5;
+var1 = var6;
 goto RET_LABEL2;
 RET_LABEL2:(void)0;
 }
-var = var1;
+var7 = BOX_kernel__Float(var1); /* autobox from Float to Numeric */
+var = var7;
 RET_LABEL:;
 return var;
 }
@@ -1164,96 +1043,239 @@ goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Float#unary - for (self: Object): Float */
-double VIRTUAL_kernel__Float__unary_32d_45d(val* self) {
-double var /* : Float */;
+/* method kernel#Float#unary - for (self: Object): Numeric */
+val* VIRTUAL_kernel__Float__unary_32d_45d(val* self) {
+val* var /* : Numeric */;
 double var1 /* : Float */;
 double var3 /* : Float */;
 double var4 /* : Float */;
-{ /* Inline kernel#Float#unary - (self) */
+val* var5 /* : Numeric */;
+{ /* Inline kernel#Float#unary - (self) on <self:Object(Float)> */
 var3 = ((struct instance_kernel__Float*)self)->value; /* autounbox from Object to Float */;
 var4 = -var3;
 var1 = var4;
 goto RET_LABEL2;
 RET_LABEL2:(void)0;
 }
-var = var1;
+var5 = BOX_kernel__Float(var1); /* autobox from Float to Numeric */
+var = var5;
 RET_LABEL:;
 return var;
 }
 /* method kernel#Float#- for (self: Float, Float): Float */
 double kernel__Float___45d(double self, double p0) {
 double var /* : Float */;
-double var1 /* : Float */;
-var1 = self - p0;
-var = var1;
+short int var1 /* : Bool */;
+int cltype;
+int idtype;
+const char* var_class_name;
+double var2 /* : Float */;
+/* Covariant cast for argument 0 (i) <p0:Float> isa OTHER */
+/* <p0:Float> isa OTHER */
+var1 = 1; /* easy <p0:Float> isa OTHER*/
+if (unlikely(!var1)) {
+var_class_name = type_kernel__Float.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 304);
+show_backtrace(1);
+}
+var2 = self - p0;
+var = var2;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Float#- for (self: Object, Float): Float */
-double VIRTUAL_kernel__Float___45d(val* self, double p0) {
-double var /* : Float */;
+/* method kernel#Float#- for (self: Object, Numeric): Numeric */
+val* VIRTUAL_kernel__Float___45d(val* self, val* p0) {
+val* var /* : Numeric */;
 double var1 /* : Float */;
-double var3 /* : Float */;
+short int var3 /* : Bool */;
+int cltype;
+int idtype;
+const struct type* type_struct;
+const char* var_class_name;
 double var4 /* : Float */;
-{ /* Inline kernel#Float#- (self,p0) */
-var3 = ((struct instance_kernel__Float*)self)->value; /* autounbox from Object to Float */;
-var4 = var3 - p0;
-var1 = var4;
+double var5 /* : Float */;
+double var6 /* : Float */;
+val* var7 /* : Numeric */;
+{ /* Inline kernel#Float#- (self,p0) on <self:Object(Float)> */
+/* Covariant cast for argument 0 (i) <p0:Numeric> isa OTHER */
+/* <p0:Numeric> isa OTHER */
+type_struct = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
+cltype = type_struct->color;
+idtype = type_struct->id;
+if(cltype >= p0->type->table_size) {
+var3 = 0;
+} else {
+var3 = p0->type->type_table[cltype] == idtype;
+}
+if (unlikely(!var3)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 304);
+show_backtrace(1);
+}
+var4 = ((struct instance_kernel__Float*)self)->value; /* autounbox from Object to Float */;
+var5 = ((struct instance_kernel__Float*)p0)->value; /* autounbox from Numeric to Float */;
+var6 = var4 - var5;
+var1 = var6;
 goto RET_LABEL2;
 RET_LABEL2:(void)0;
 }
-var = var1;
+var7 = BOX_kernel__Float(var1); /* autobox from Float to Numeric */
+var = var7;
 RET_LABEL:;
 return var;
 }
 /* method kernel#Float#* for (self: Float, Float): Float */
 double kernel__Float___42d(double self, double p0) {
 double var /* : Float */;
-double var1 /* : Float */;
-var1 = self * p0;
-var = var1;
+short int var1 /* : Bool */;
+int cltype;
+int idtype;
+const char* var_class_name;
+double var2 /* : Float */;
+/* Covariant cast for argument 0 (i) <p0:Float> isa OTHER */
+/* <p0:Float> isa OTHER */
+var1 = 1; /* easy <p0:Float> isa OTHER*/
+if (unlikely(!var1)) {
+var_class_name = type_kernel__Float.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 305);
+show_backtrace(1);
+}
+var2 = self * p0;
+var = var2;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Float#* for (self: Object, Float): Float */
-double VIRTUAL_kernel__Float___42d(val* self, double p0) {
-double var /* : Float */;
+/* method kernel#Float#* for (self: Object, Numeric): Numeric */
+val* VIRTUAL_kernel__Float___42d(val* self, val* p0) {
+val* var /* : Numeric */;
 double var1 /* : Float */;
-double var3 /* : Float */;
+short int var3 /* : Bool */;
+int cltype;
+int idtype;
+const struct type* type_struct;
+const char* var_class_name;
 double var4 /* : Float */;
-{ /* Inline kernel#Float#* (self,p0) */
-var3 = ((struct instance_kernel__Float*)self)->value; /* autounbox from Object to Float */;
-var4 = var3 * p0;
-var1 = var4;
+double var5 /* : Float */;
+double var6 /* : Float */;
+val* var7 /* : Numeric */;
+{ /* Inline kernel#Float#* (self,p0) on <self:Object(Float)> */
+/* Covariant cast for argument 0 (i) <p0:Numeric> isa OTHER */
+/* <p0:Numeric> isa OTHER */
+type_struct = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
+cltype = type_struct->color;
+idtype = type_struct->id;
+if(cltype >= p0->type->table_size) {
+var3 = 0;
+} else {
+var3 = p0->type->type_table[cltype] == idtype;
+}
+if (unlikely(!var3)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 305);
+show_backtrace(1);
+}
+var4 = ((struct instance_kernel__Float*)self)->value; /* autounbox from Object to Float */;
+var5 = ((struct instance_kernel__Float*)p0)->value; /* autounbox from Numeric to Float */;
+var6 = var4 * var5;
+var1 = var6;
 goto RET_LABEL2;
 RET_LABEL2:(void)0;
 }
-var = var1;
+var7 = BOX_kernel__Float(var1); /* autobox from Float to Numeric */
+var = var7;
 RET_LABEL:;
 return var;
 }
 /* method kernel#Float#/ for (self: Float, Float): Float */
 double kernel__Float___47d(double self, double p0) {
 double var /* : Float */;
+short int var1 /* : Bool */;
+int cltype;
+int idtype;
+const char* var_class_name;
+double var2 /* : Float */;
+/* Covariant cast for argument 0 (i) <p0:Float> isa OTHER */
+/* <p0:Float> isa OTHER */
+var1 = 1; /* easy <p0:Float> isa OTHER*/
+if (unlikely(!var1)) {
+var_class_name = type_kernel__Float.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 306);
+show_backtrace(1);
+}
+var2 = self / p0;
+var = var2;
+goto RET_LABEL;
+RET_LABEL:;
+return var;
+}
+/* method kernel#Float#/ for (self: Object, Numeric): Numeric */
+val* VIRTUAL_kernel__Float___47d(val* self, val* p0) {
+val* var /* : Numeric */;
 double var1 /* : Float */;
-var1 = self / p0;
+short int var3 /* : Bool */;
+int cltype;
+int idtype;
+const struct type* type_struct;
+const char* var_class_name;
+double var4 /* : Float */;
+double var5 /* : Float */;
+double var6 /* : Float */;
+val* var7 /* : Numeric */;
+{ /* Inline kernel#Float#/ (self,p0) on <self:Object(Float)> */
+/* Covariant cast for argument 0 (i) <p0:Numeric> isa OTHER */
+/* <p0:Numeric> isa OTHER */
+type_struct = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
+cltype = type_struct->color;
+idtype = type_struct->id;
+if(cltype >= p0->type->table_size) {
+var3 = 0;
+} else {
+var3 = p0->type->type_table[cltype] == idtype;
+}
+if (unlikely(!var3)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 306);
+show_backtrace(1);
+}
+var4 = ((struct instance_kernel__Float*)self)->value; /* autounbox from Object to Float */;
+var5 = ((struct instance_kernel__Float*)p0)->value; /* autounbox from Numeric to Float */;
+var6 = var4 / var5;
+var1 = var6;
+goto RET_LABEL2;
+RET_LABEL2:(void)0;
+}
+var7 = BOX_kernel__Float(var1); /* autobox from Float to Numeric */
+var = var7;
+RET_LABEL:;
+return var;
+}
+/* method kernel#Float#to_i for (self: Float): Int */
+long kernel__Float__to_i(double self) {
+long var /* : Int */;
+long var1 /* : Int */;
+var1 = (long)self;
 var = var1;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Float#/ for (self: Object, Float): Float */
-double VIRTUAL_kernel__Float___47d(val* self, double p0) {
-double var /* : Float */;
-double var1 /* : Float */;
+/* method kernel#Float#to_i for (self: Object): Int */
+long VIRTUAL_kernel__Float__to_i(val* self) {
+long var /* : Int */;
+long var1 /* : Int */;
 double var3 /* : Float */;
-double var4 /* : Float */;
-{ /* Inline kernel#Float#/ (self,p0) */
+long var4 /* : Int */;
+{ /* Inline kernel#Float#to_i (self) on <self:Object(Float)> */
 var3 = ((struct instance_kernel__Float*)self)->value; /* autounbox from Object to Float */;
-var4 = var3 / p0;
+var4 = (long)var3;
 var1 = var4;
 goto RET_LABEL2;
 RET_LABEL2:(void)0;
@@ -1262,30 +1284,176 @@ var = var1;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Float#to_i for (self: Float): Int */
-long kernel__Float__to_i(double self) {
+/* method kernel#Float#to_f for (self: Float): Float */
+double kernel__Float__to_f(double self) {
+double var /* : Float */;
+var = self;
+goto RET_LABEL;
+RET_LABEL:;
+return var;
+}
+/* method kernel#Float#to_f for (self: Object): Float */
+double VIRTUAL_kernel__Float__to_f(val* self) {
+double var /* : Float */;
+double var1 /* : Float */;
+double var2 /* : Float */;
+var2 = ((struct instance_kernel__Float*)self)->value; /* autounbox from Object to Float */;
+var1 = kernel__Float__to_f(var2);
+var = var1;
+RET_LABEL:;
+return var;
+}
+/* method kernel#Float#<=> for (self: Float, Float): Int */
+long kernel__Float___60d_61d_62d(double self, double p0) {
+long var /* : Int */;
+short int var1 /* : Bool */;
+int cltype;
+int idtype;
+const char* var_class_name;
+double var_other /* var other: Float */;
+short int var2 /* : Bool */;
+short int var4 /* : Bool */;
+int cltype5;
+int idtype6;
+const char* var_class_name7;
+short int var8 /* : Bool */;
+long var9 /* : Int */;
+long var10 /* : Int */;
+long var12 /* : Int */;
+short int var13 /* : Bool */;
+short int var15 /* : Bool */;
+int cltype16;
+int idtype17;
+const char* var_class_name18;
+short int var19 /* : Bool */;
+long var20 /* : Int */;
+long var21 /* : Int */;
+/* Covariant cast for argument 0 (other) <p0:Float> isa OTHER */
+/* <p0:Float> isa OTHER */
+var1 = 1; /* easy <p0:Float> isa OTHER*/
+if (unlikely(!var1)) {
+var_class_name = type_kernel__Float.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 314);
+show_backtrace(1);
+}
+var_other = p0;
+{
+{ /* Inline kernel#Float#< (self,var_other) on <self:Float> */
+/* Covariant cast for argument 0 (i) <var_other:Float> isa OTHER */
+/* <var_other:Float> isa OTHER */
+var4 = 1; /* easy <var_other:Float> isa OTHER*/
+if (unlikely(!var4)) {
+var_class_name7 = type_kernel__Float.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name7);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 298);
+show_backtrace(1);
+}
+var8 = self < var_other;
+var2 = var8;
+goto RET_LABEL3;
+RET_LABEL3:(void)0;
+}
+}
+if (var2){
+var9 = 1;
+{
+{ /* Inline kernel#Int#unary - (var9) on <var9:Int> */
+var12 = -var9;
+var10 = var12;
+goto RET_LABEL11;
+RET_LABEL11:(void)0;
+}
+}
+var = var10;
+goto RET_LABEL;
+} else {
+{
+{ /* Inline kernel#Float#< (var_other,self) on <var_other:Float> */
+/* Covariant cast for argument 0 (i) <self:Float> isa OTHER */
+/* <self:Float> isa OTHER */
+var15 = 1; /* easy <self:Float> isa OTHER*/
+if (unlikely(!var15)) {
+var_class_name18 = type_kernel__Float.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name18);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 298);
+show_backtrace(1);
+}
+var19 = var_other < self;
+var13 = var19;
+goto RET_LABEL14;
+RET_LABEL14:(void)0;
+}
+}
+if (var13){
+var20 = 1;
+var = var20;
+goto RET_LABEL;
+} else {
+var21 = 0;
+var = var21;
+goto RET_LABEL;
+}
+}
+RET_LABEL:;
+return var;
+}
+/* method kernel#Float#<=> for (self: Object, Comparable): Int */
+long VIRTUAL_kernel__Float___60d_61d_62d(val* self, val* p0) {
 long var /* : Int */;
 long var1 /* : Int */;
-var1 = (long)self;
+double var2 /* : Float */;
+double var3 /* : Float */;
+var2 = ((struct instance_kernel__Float*)self)->value; /* autounbox from Object to Float */;
+var3 = ((struct instance_kernel__Float*)p0)->value; /* autounbox from Comparable to Float */;
+var1 = kernel__Float___60d_61d_62d(var2, var3);
 var = var1;
-goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Float#to_i for (self: Object): Int */
-long VIRTUAL_kernel__Float__to_i(val* self) {
+/* method kernel#Int#successor for (self: Int, Int): Int */
+long kernel__Int__successor(long self, long p0) {
 long var /* : Int */;
+long var_i /* var i: Int */;
 long var1 /* : Int */;
-double var3 /* : Float */;
+short int var3 /* : Bool */;
+int cltype;
+int idtype;
+const char* var_class_name;
 long var4 /* : Int */;
-{ /* Inline kernel#Float#to_i (self) */
-var3 = ((struct instance_kernel__Float*)self)->value; /* autounbox from Object to Float */;
-var4 = (long)var3;
+var_i = p0;
+{
+{ /* Inline kernel#Int#+ (self,var_i) on <self:Int> */
+/* Covariant cast for argument 0 (i) <var_i:Int> isa OTHER */
+/* <var_i:Int> isa OTHER */
+var3 = 1; /* easy <var_i:Int> isa OTHER*/
+if (unlikely(!var3)) {
+var_class_name = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 374);
+show_backtrace(1);
+}
+var4 = self + var_i;
 var1 = var4;
 goto RET_LABEL2;
 RET_LABEL2:(void)0;
 }
+}
 var = var1;
+goto RET_LABEL;
+RET_LABEL:;
+return var;
+}
+/* method kernel#Int#successor for (self: Object, Int): Discrete */
+val* VIRTUAL_kernel__Int__successor(val* self, long p0) {
+val* var /* : Discrete */;
+long var1 /* : Int */;
+long var2 /* : Int */;
+val* var3 /* : Discrete */;
+var2 = ((struct instance_kernel__Int*)self)->value; /* autounbox from Object to Int */;
+var1 = kernel__Int__successor(var2, p0);
+var3 = BOX_kernel__Int(var1); /* autobox from Int to Discrete */
+var = var3;
 RET_LABEL:;
 return var;
 }
@@ -1302,7 +1470,7 @@ long VIRTUAL_kernel__Int__object_id(val* self) {
 long var /* : Int */;
 long var1 /* : Int */;
 long var3 /* : Int */;
-{ /* Inline kernel#Int#object_id (self) */
+{ /* Inline kernel#Int#object_id (self) on <self:Object(Int)> */
 var3 = ((struct instance_kernel__Int*)self)->value; /* autounbox from Object to Int */;
 var1 = var3;
 goto RET_LABEL2;
@@ -1351,7 +1519,7 @@ short int VIRTUAL_kernel__Int___61d_61d(val* self, val* p0) {
 short int var /* : Bool */;
 short int var1 /* : Bool */;
 short int var3 /* : Bool */;
-{ /* Inline kernel#Int#== (self,p0) */
+{ /* Inline kernel#Int#== (self,p0) on <self:Object(Int)> */
 var3 = self == p0 || (p0 != NULL && self->class == p0->class && ((struct instance_kernel__Int*)self)->value == ((struct instance_kernel__Int*)p0)->value);
 var1 = var3;
 goto RET_LABEL2;
@@ -1384,7 +1552,7 @@ short int var /* : Bool */;
 short int var1 /* : Bool */;
 short int var3 /* : Bool */;
 short int var4 /* : Bool */;
-{ /* Inline kernel#Int#!= (self,p0) */
+{ /* Inline kernel#Int#!= (self,p0) on <self:Object(Int)> */
 var3 = self == p0 || (p0 != NULL && self->class == p0->class && ((struct instance_kernel__Int*)self)->value == ((struct instance_kernel__Int*)p0)->value);
 var4 = !var3;
 var1 = var4;
@@ -1395,34 +1563,22 @@ var = var1;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Int#output for (self: Int) */
-void kernel__Int__output(long self) {
-printf("%ld\n", self);
-RET_LABEL:;
-}
-/* method kernel#Int#output for (self: Object) */
-void VIRTUAL_kernel__Int__output(val* self) {
-long var /* : Int */;
-{ /* Inline kernel#Int#output (self) */
-var = ((struct instance_kernel__Int*)self)->value; /* autounbox from Object to Int */;
-printf("%ld\n", var);
-RET_LABEL1:(void)0;
-}
-RET_LABEL:;
-}
 /* method kernel#Int#<= for (self: Int, Int): Bool */
 short int kernel__Int___60d_61d(long self, long p0) {
 short int var /* : Bool */;
 short int var1 /* : Bool */;
 int cltype;
 int idtype;
+const char* var_class_name;
 short int var2 /* : Bool */;
 /* Covariant cast for argument 0 (i) <p0:Int> isa OTHER */
 /* <p0:Int> isa OTHER */
 var1 = 1; /* easy <p0:Int> isa OTHER*/
-if (!var1) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 256);
-exit(1);
+if (unlikely(!var1)) {
+var_class_name = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 370);
+show_backtrace(1);
 }
 var2 = self <= p0;
 var = var2;
@@ -1438,10 +1594,11 @@ short int var3 /* : Bool */;
 int cltype;
 int idtype;
 const struct type* type_struct;
+const char* var_class_name;
 long var4 /* : Int */;
 long var5 /* : Int */;
 short int var6 /* : Bool */;
-{ /* Inline kernel#Int#<= (self,p0) */
+{ /* Inline kernel#Int#<= (self,p0) on <self:Object(Int)> */
 /* Covariant cast for argument 0 (i) <p0:Comparable> isa OTHER */
 /* <p0:Comparable> isa OTHER */
 type_struct = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
@@ -1452,9 +1609,11 @@ var3 = 0;
 } else {
 var3 = p0->type->type_table[cltype] == idtype;
 }
-if (!var3) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 256);
-exit(1);
+if (unlikely(!var3)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 370);
+show_backtrace(1);
 }
 var4 = ((struct instance_kernel__Int*)self)->value; /* autounbox from Object to Int */;
 var5 = ((struct instance_kernel__Int*)p0)->value; /* autounbox from Comparable to Int */;
@@ -1473,13 +1632,16 @@ short int var /* : Bool */;
 short int var1 /* : Bool */;
 int cltype;
 int idtype;
+const char* var_class_name;
 short int var2 /* : Bool */;
 /* Covariant cast for argument 0 (i) <p0:Int> isa OTHER */
 /* <p0:Int> isa OTHER */
 var1 = 1; /* easy <p0:Int> isa OTHER*/
-if (!var1) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 257);
-exit(1);
+if (unlikely(!var1)) {
+var_class_name = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 371);
+show_backtrace(1);
 }
 var2 = self < p0;
 var = var2;
@@ -1495,10 +1657,11 @@ short int var3 /* : Bool */;
 int cltype;
 int idtype;
 const struct type* type_struct;
+const char* var_class_name;
 long var4 /* : Int */;
 long var5 /* : Int */;
 short int var6 /* : Bool */;
-{ /* Inline kernel#Int#< (self,p0) */
+{ /* Inline kernel#Int#< (self,p0) on <self:Object(Int)> */
 /* Covariant cast for argument 0 (i) <p0:Comparable> isa OTHER */
 /* <p0:Comparable> isa OTHER */
 type_struct = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
@@ -1509,9 +1672,11 @@ var3 = 0;
 } else {
 var3 = p0->type->type_table[cltype] == idtype;
 }
-if (!var3) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 257);
-exit(1);
+if (unlikely(!var3)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 371);
+show_backtrace(1);
 }
 var4 = ((struct instance_kernel__Int*)self)->value; /* autounbox from Object to Int */;
 var5 = ((struct instance_kernel__Int*)p0)->value; /* autounbox from Comparable to Int */;
@@ -1530,13 +1695,16 @@ short int var /* : Bool */;
 short int var1 /* : Bool */;
 int cltype;
 int idtype;
+const char* var_class_name;
 short int var2 /* : Bool */;
 /* Covariant cast for argument 0 (i) <p0:Int> isa OTHER */
 /* <p0:Int> isa OTHER */
 var1 = 1; /* easy <p0:Int> isa OTHER*/
-if (!var1) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 258);
-exit(1);
+if (unlikely(!var1)) {
+var_class_name = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 372);
+show_backtrace(1);
 }
 var2 = self >= p0;
 var = var2;
@@ -1552,10 +1720,11 @@ short int var3 /* : Bool */;
 int cltype;
 int idtype;
 const struct type* type_struct;
+const char* var_class_name;
 long var4 /* : Int */;
 long var5 /* : Int */;
 short int var6 /* : Bool */;
-{ /* Inline kernel#Int#>= (self,p0) */
+{ /* Inline kernel#Int#>= (self,p0) on <self:Object(Int)> */
 /* Covariant cast for argument 0 (i) <p0:Comparable> isa OTHER */
 /* <p0:Comparable> isa OTHER */
 type_struct = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
@@ -1566,9 +1735,11 @@ var3 = 0;
 } else {
 var3 = p0->type->type_table[cltype] == idtype;
 }
-if (!var3) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 258);
-exit(1);
+if (unlikely(!var3)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 372);
+show_backtrace(1);
 }
 var4 = ((struct instance_kernel__Int*)self)->value; /* autounbox from Object to Int */;
 var5 = ((struct instance_kernel__Int*)p0)->value; /* autounbox from Comparable to Int */;
@@ -1587,13 +1758,16 @@ short int var /* : Bool */;
 short int var1 /* : Bool */;
 int cltype;
 int idtype;
+const char* var_class_name;
 short int var2 /* : Bool */;
 /* Covariant cast for argument 0 (i) <p0:Int> isa OTHER */
 /* <p0:Int> isa OTHER */
 var1 = 1; /* easy <p0:Int> isa OTHER*/
-if (!var1) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 259);
-exit(1);
+if (unlikely(!var1)) {
+var_class_name = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 373);
+show_backtrace(1);
 }
 var2 = self > p0;
 var = var2;
@@ -1609,10 +1783,11 @@ short int var3 /* : Bool */;
 int cltype;
 int idtype;
 const struct type* type_struct;
+const char* var_class_name;
 long var4 /* : Int */;
 long var5 /* : Int */;
 short int var6 /* : Bool */;
-{ /* Inline kernel#Int#> (self,p0) */
+{ /* Inline kernel#Int#> (self,p0) on <self:Object(Int)> */
 /* Covariant cast for argument 0 (i) <p0:Comparable> isa OTHER */
 /* <p0:Comparable> isa OTHER */
 type_struct = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
@@ -1623,9 +1798,11 @@ var3 = 0;
 } else {
 var3 = p0->type->type_table[cltype] == idtype;
 }
-if (!var3) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 259);
-exit(1);
+if (unlikely(!var3)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 373);
+show_backtrace(1);
 }
 var4 = ((struct instance_kernel__Int*)self)->value; /* autounbox from Object to Int */;
 var5 = ((struct instance_kernel__Int*)p0)->value; /* autounbox from Comparable to Int */;
@@ -1641,29 +1818,65 @@ return var;
 /* method kernel#Int#+ for (self: Int, Int): Int */
 long kernel__Int___43d(long self, long p0) {
 long var /* : Int */;
-long var1 /* : Int */;
-var1 = self + p0;
-var = var1;
+short int var1 /* : Bool */;
+int cltype;
+int idtype;
+const char* var_class_name;
+long var2 /* : Int */;
+/* Covariant cast for argument 0 (i) <p0:Int> isa OTHER */
+/* <p0:Int> isa OTHER */
+var1 = 1; /* easy <p0:Int> isa OTHER*/
+if (unlikely(!var1)) {
+var_class_name = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 374);
+show_backtrace(1);
+}
+var2 = self + p0;
+var = var2;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Int#+ for (self: Object, Int): Discrete */
-val* VIRTUAL_kernel__Int___43d(val* self, long p0) {
-val* var /* : Discrete */;
+/* method kernel#Int#+ for (self: Object, Numeric): Numeric */
+val* VIRTUAL_kernel__Int___43d(val* self, val* p0) {
+val* var /* : Numeric */;
 long var1 /* : Int */;
-long var3 /* : Int */;
+short int var3 /* : Bool */;
+int cltype;
+int idtype;
+const struct type* type_struct;
+const char* var_class_name;
 long var4 /* : Int */;
-val* var5 /* : Discrete */;
-{ /* Inline kernel#Int#+ (self,p0) */
-var3 = ((struct instance_kernel__Int*)self)->value; /* autounbox from Object to Int */;
-var4 = var3 + p0;
-var1 = var4;
+long var5 /* : Int */;
+long var6 /* : Int */;
+val* var7 /* : Numeric */;
+{ /* Inline kernel#Int#+ (self,p0) on <self:Object(Int)> */
+/* Covariant cast for argument 0 (i) <p0:Numeric> isa OTHER */
+/* <p0:Numeric> isa OTHER */
+type_struct = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
+cltype = type_struct->color;
+idtype = type_struct->id;
+if(cltype >= p0->type->table_size) {
+var3 = 0;
+} else {
+var3 = p0->type->type_table[cltype] == idtype;
+}
+if (unlikely(!var3)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 374);
+show_backtrace(1);
+}
+var4 = ((struct instance_kernel__Int*)self)->value; /* autounbox from Object to Int */;
+var5 = ((struct instance_kernel__Int*)p0)->value; /* autounbox from Numeric to Int */;
+var6 = var4 + var5;
+var1 = var6;
 goto RET_LABEL2;
 RET_LABEL2:(void)0;
 }
-var5 = BOX_kernel__Int(var1); /* autobox from Int to Discrete */
-var = var5;
+var7 = BOX_kernel__Int(var1); /* autobox from Int to Numeric */
+var = var7;
 RET_LABEL:;
 return var;
 }
@@ -1677,103 +1890,217 @@ goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Int#unary - for (self: Object): Int */
-long VIRTUAL_kernel__Int__unary_32d_45d(val* self) {
-long var /* : Int */;
+/* method kernel#Int#unary - for (self: Object): Numeric */
+val* VIRTUAL_kernel__Int__unary_32d_45d(val* self) {
+val* var /* : Numeric */;
 long var1 /* : Int */;
 long var3 /* : Int */;
 long var4 /* : Int */;
-{ /* Inline kernel#Int#unary - (self) */
+val* var5 /* : Numeric */;
+{ /* Inline kernel#Int#unary - (self) on <self:Object(Int)> */
 var3 = ((struct instance_kernel__Int*)self)->value; /* autounbox from Object to Int */;
 var4 = -var3;
 var1 = var4;
 goto RET_LABEL2;
 RET_LABEL2:(void)0;
 }
-var = var1;
+var5 = BOX_kernel__Int(var1); /* autobox from Int to Numeric */
+var = var5;
 RET_LABEL:;
 return var;
 }
 /* method kernel#Int#- for (self: Int, Int): Int */
 long kernel__Int___45d(long self, long p0) {
 long var /* : Int */;
-long var1 /* : Int */;
-var1 = self - p0;
-var = var1;
+short int var1 /* : Bool */;
+int cltype;
+int idtype;
+const char* var_class_name;
+long var2 /* : Int */;
+/* Covariant cast for argument 0 (i) <p0:Int> isa OTHER */
+/* <p0:Int> isa OTHER */
+var1 = 1; /* easy <p0:Int> isa OTHER*/
+if (unlikely(!var1)) {
+var_class_name = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 377);
+show_backtrace(1);
+}
+var2 = self - p0;
+var = var2;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Int#- for (self: Object, Int): Discrete */
-val* VIRTUAL_kernel__Int___45d(val* self, long p0) {
-val* var /* : Discrete */;
+/* method kernel#Int#- for (self: Object, Numeric): Numeric */
+val* VIRTUAL_kernel__Int___45d(val* self, val* p0) {
+val* var /* : Numeric */;
 long var1 /* : Int */;
-long var3 /* : Int */;
+short int var3 /* : Bool */;
+int cltype;
+int idtype;
+const struct type* type_struct;
+const char* var_class_name;
 long var4 /* : Int */;
-val* var5 /* : Discrete */;
-{ /* Inline kernel#Int#- (self,p0) */
-var3 = ((struct instance_kernel__Int*)self)->value; /* autounbox from Object to Int */;
-var4 = var3 - p0;
-var1 = var4;
+long var5 /* : Int */;
+long var6 /* : Int */;
+val* var7 /* : Numeric */;
+{ /* Inline kernel#Int#- (self,p0) on <self:Object(Int)> */
+/* Covariant cast for argument 0 (i) <p0:Numeric> isa OTHER */
+/* <p0:Numeric> isa OTHER */
+type_struct = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
+cltype = type_struct->color;
+idtype = type_struct->id;
+if(cltype >= p0->type->table_size) {
+var3 = 0;
+} else {
+var3 = p0->type->type_table[cltype] == idtype;
+}
+if (unlikely(!var3)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 377);
+show_backtrace(1);
+}
+var4 = ((struct instance_kernel__Int*)self)->value; /* autounbox from Object to Int */;
+var5 = ((struct instance_kernel__Int*)p0)->value; /* autounbox from Numeric to Int */;
+var6 = var4 - var5;
+var1 = var6;
 goto RET_LABEL2;
 RET_LABEL2:(void)0;
 }
-var5 = BOX_kernel__Int(var1); /* autobox from Int to Discrete */
-var = var5;
+var7 = BOX_kernel__Int(var1); /* autobox from Int to Numeric */
+var = var7;
 RET_LABEL:;
 return var;
 }
 /* method kernel#Int#* for (self: Int, Int): Int */
 long kernel__Int___42d(long self, long p0) {
 long var /* : Int */;
-long var1 /* : Int */;
-var1 = self * p0;
-var = var1;
+short int var1 /* : Bool */;
+int cltype;
+int idtype;
+const char* var_class_name;
+long var2 /* : Int */;
+/* Covariant cast for argument 0 (i) <p0:Int> isa OTHER */
+/* <p0:Int> isa OTHER */
+var1 = 1; /* easy <p0:Int> isa OTHER*/
+if (unlikely(!var1)) {
+var_class_name = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 378);
+show_backtrace(1);
+}
+var2 = self * p0;
+var = var2;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Int#* for (self: Object, Int): Int */
-long VIRTUAL_kernel__Int___42d(val* self, long p0) {
-long var /* : Int */;
+/* method kernel#Int#* for (self: Object, Numeric): Numeric */
+val* VIRTUAL_kernel__Int___42d(val* self, val* p0) {
+val* var /* : Numeric */;
 long var1 /* : Int */;
-long var3 /* : Int */;
+short int var3 /* : Bool */;
+int cltype;
+int idtype;
+const struct type* type_struct;
+const char* var_class_name;
 long var4 /* : Int */;
-{ /* Inline kernel#Int#* (self,p0) */
-var3 = ((struct instance_kernel__Int*)self)->value; /* autounbox from Object to Int */;
-var4 = var3 * p0;
-var1 = var4;
+long var5 /* : Int */;
+long var6 /* : Int */;
+val* var7 /* : Numeric */;
+{ /* Inline kernel#Int#* (self,p0) on <self:Object(Int)> */
+/* Covariant cast for argument 0 (i) <p0:Numeric> isa OTHER */
+/* <p0:Numeric> isa OTHER */
+type_struct = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
+cltype = type_struct->color;
+idtype = type_struct->id;
+if(cltype >= p0->type->table_size) {
+var3 = 0;
+} else {
+var3 = p0->type->type_table[cltype] == idtype;
+}
+if (unlikely(!var3)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 378);
+show_backtrace(1);
+}
+var4 = ((struct instance_kernel__Int*)self)->value; /* autounbox from Object to Int */;
+var5 = ((struct instance_kernel__Int*)p0)->value; /* autounbox from Numeric to Int */;
+var6 = var4 * var5;
+var1 = var6;
 goto RET_LABEL2;
 RET_LABEL2:(void)0;
 }
-var = var1;
+var7 = BOX_kernel__Int(var1); /* autobox from Int to Numeric */
+var = var7;
 RET_LABEL:;
 return var;
 }
 /* method kernel#Int#/ for (self: Int, Int): Int */
 long kernel__Int___47d(long self, long p0) {
 long var /* : Int */;
-long var1 /* : Int */;
-var1 = self / p0;
-var = var1;
+short int var1 /* : Bool */;
+int cltype;
+int idtype;
+const char* var_class_name;
+long var2 /* : Int */;
+/* Covariant cast for argument 0 (i) <p0:Int> isa OTHER */
+/* <p0:Int> isa OTHER */
+var1 = 1; /* easy <p0:Int> isa OTHER*/
+if (unlikely(!var1)) {
+var_class_name = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 379);
+show_backtrace(1);
+}
+var2 = self / p0;
+var = var2;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Int#/ for (self: Object, Int): Int */
-long VIRTUAL_kernel__Int___47d(val* self, long p0) {
-long var /* : Int */;
+/* method kernel#Int#/ for (self: Object, Numeric): Numeric */
+val* VIRTUAL_kernel__Int___47d(val* self, val* p0) {
+val* var /* : Numeric */;
 long var1 /* : Int */;
-long var3 /* : Int */;
+short int var3 /* : Bool */;
+int cltype;
+int idtype;
+const struct type* type_struct;
+const char* var_class_name;
 long var4 /* : Int */;
-{ /* Inline kernel#Int#/ (self,p0) */
-var3 = ((struct instance_kernel__Int*)self)->value; /* autounbox from Object to Int */;
-var4 = var3 / p0;
-var1 = var4;
+long var5 /* : Int */;
+long var6 /* : Int */;
+val* var7 /* : Numeric */;
+{ /* Inline kernel#Int#/ (self,p0) on <self:Object(Int)> */
+/* Covariant cast for argument 0 (i) <p0:Numeric> isa OTHER */
+/* <p0:Numeric> isa OTHER */
+type_struct = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
+cltype = type_struct->color;
+idtype = type_struct->id;
+if(cltype >= p0->type->table_size) {
+var3 = 0;
+} else {
+var3 = p0->type->type_table[cltype] == idtype;
+}
+if (unlikely(!var3)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 379);
+show_backtrace(1);
+}
+var4 = ((struct instance_kernel__Int*)self)->value; /* autounbox from Object to Int */;
+var5 = ((struct instance_kernel__Int*)p0)->value; /* autounbox from Numeric to Int */;
+var6 = var4 / var5;
+var1 = var6;
 goto RET_LABEL2;
 RET_LABEL2:(void)0;
 }
-var = var1;
+var7 = BOX_kernel__Int(var1); /* autobox from Int to Numeric */
+var = var7;
 RET_LABEL:;
 return var;
 }
@@ -1793,7 +2120,7 @@ long var /* : Int */;
 long var1 /* : Int */;
 long var3 /* : Int */;
 long var4 /* : Int */;
-{ /* Inline kernel#Int#% (self,p0) */
+{ /* Inline kernel#Int#% (self,p0) on <self:Object(Int)> */
 var3 = ((struct instance_kernel__Int*)self)->value; /* autounbox from Object to Int */;
 var4 = var3 % p0;
 var1 = var4;
@@ -1814,132 +2141,66 @@ goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Int#lshift for (self: Object, Int): Int */
-long VIRTUAL_kernel__Int__lshift(val* self, long p0) {
-long var /* : Int */;
-long var1 /* : Int */;
-long var3 /* : Int */;
-long var4 /* : Int */;
-{ /* Inline kernel#Int#lshift (self,p0) */
-var3 = ((struct instance_kernel__Int*)self)->value; /* autounbox from Object to Int */;
-var4 = var3 << p0;
-var1 = var4;
-goto RET_LABEL2;
-RET_LABEL2:(void)0;
-}
-var = var1;
-RET_LABEL:;
-return var;
-}
-/* method kernel#Int#rshift for (self: Int, Int): Int */
-long kernel__Int__rshift(long self, long p0) {
-long var /* : Int */;
-long var1 /* : Int */;
-var1 = self >> p0;
-var = var1;
-goto RET_LABEL;
-RET_LABEL:;
-return var;
-}
-/* method kernel#Int#rshift for (self: Object, Int): Int */
-long VIRTUAL_kernel__Int__rshift(val* self, long p0) {
-long var /* : Int */;
-long var1 /* : Int */;
-long var3 /* : Int */;
-long var4 /* : Int */;
-{ /* Inline kernel#Int#rshift (self,p0) */
-var3 = ((struct instance_kernel__Int*)self)->value; /* autounbox from Object to Int */;
-var4 = var3 >> p0;
-var1 = var4;
-goto RET_LABEL2;
-RET_LABEL2:(void)0;
-}
-var = var1;
-RET_LABEL:;
-return var;
-}
-/* method kernel#Int#to_f for (self: Int): Float */
-double kernel__Int__to_f(long self) {
-double var /* : Float */;
-double var1 /* : Float */;
-var1 = (double)self;
-var = var1;
-goto RET_LABEL;
-RET_LABEL:;
-return var;
-}
-/* method kernel#Int#to_f for (self: Object): Float */
-double VIRTUAL_kernel__Int__to_f(val* self) {
-double var /* : Float */;
-double var1 /* : Float */;
-long var3 /* : Int */;
-double var4 /* : Float */;
-{ /* Inline kernel#Int#to_f (self) */
-var3 = ((struct instance_kernel__Int*)self)->value; /* autounbox from Object to Int */;
-var4 = (double)var3;
-var1 = var4;
-goto RET_LABEL2;
-RET_LABEL2:(void)0;
-}
-var = var1;
-RET_LABEL:;
-return var;
-}
-/* method kernel#Int#succ for (self: Int): Int */
-long kernel__Int__succ(long self) {
-long var /* : Int */;
-long var1 /* : Int */;
-var1 = self+1;
-var = var1;
-goto RET_LABEL;
-RET_LABEL:;
-return var;
-}
-/* method kernel#Int#succ for (self: Object): Discrete */
-val* VIRTUAL_kernel__Int__succ(val* self) {
-val* var /* : Discrete */;
+/* method kernel#Int#lshift for (self: Object, Int): Int */
+long VIRTUAL_kernel__Int__lshift(val* self, long p0) {
+long var /* : Int */;
 long var1 /* : Int */;
 long var3 /* : Int */;
 long var4 /* : Int */;
-val* var5 /* : Discrete */;
-{ /* Inline kernel#Int#succ (self) */
+{ /* Inline kernel#Int#lshift (self,p0) on <self:Object(Int)> */
 var3 = ((struct instance_kernel__Int*)self)->value; /* autounbox from Object to Int */;
-var4 = var3+1;
+var4 = var3 << p0;
 var1 = var4;
 goto RET_LABEL2;
 RET_LABEL2:(void)0;
 }
-var5 = BOX_kernel__Int(var1); /* autobox from Int to Discrete */
-var = var5;
+var = var1;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Int#prec for (self: Int): Int */
-long kernel__Int__prec(long self) {
+/* method kernel#Int#to_i for (self: Int): Int */
+long kernel__Int__to_i(long self) {
+long var /* : Int */;
+var = self;
+goto RET_LABEL;
+RET_LABEL:;
+return var;
+}
+/* method kernel#Int#to_i for (self: Object): Int */
+long VIRTUAL_kernel__Int__to_i(val* self) {
 long var /* : Int */;
 long var1 /* : Int */;
-var1 = self-1;
+long var2 /* : Int */;
+var2 = ((struct instance_kernel__Int*)self)->value; /* autounbox from Object to Int */;
+var1 = kernel__Int__to_i(var2);
+var = var1;
+RET_LABEL:;
+return var;
+}
+/* method kernel#Int#to_f for (self: Int): Float */
+double kernel__Int__to_f(long self) {
+double var /* : Float */;
+double var1 /* : Float */;
+var1 = (double)self;
 var = var1;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Int#prec for (self: Object): Discrete */
-val* VIRTUAL_kernel__Int__prec(val* self) {
-val* var /* : Discrete */;
-long var1 /* : Int */;
+/* method kernel#Int#to_f for (self: Object): Float */
+double VIRTUAL_kernel__Int__to_f(val* self) {
+double var /* : Float */;
+double var1 /* : Float */;
 long var3 /* : Int */;
-long var4 /* : Int */;
-val* var5 /* : Discrete */;
-{ /* Inline kernel#Int#prec (self) */
+double var4 /* : Float */;
+{ /* Inline kernel#Int#to_f (self) on <self:Object(Int)> */
 var3 = ((struct instance_kernel__Int*)self)->value; /* autounbox from Object to Int */;
-var4 = var3-1;
+var4 = (double)var3;
 var1 = var4;
 goto RET_LABEL2;
 RET_LABEL2:(void)0;
 }
-var5 = BOX_kernel__Int(var1); /* autobox from Int to Discrete */
-var = var5;
+var = var1;
 RET_LABEL:;
 return var;
 }
@@ -1949,58 +2210,83 @@ long var /* : Int */;
 short int var1 /* : Bool */;
 int cltype;
 int idtype;
+const char* var_class_name;
 long var_i /* var i: Int */;
 long var2 /* : Int */;
-long var4 /* : Int */;
+short int var4 /* : Bool */;
+int cltype5;
+int idtype6;
+const char* var_class_name7;
+long var8 /* : Int */;
 long var_d /* var d: Int */;
-long var5 /* : Int */;
-short int var6 /* : Bool */;
-short int var8 /* : Bool */;
-int cltype9;
-int idtype10;
-short int var11 /* : Bool */;
-long var12 /* : Int */;
-long var14 /* : Int */;
+long var9 /* : Int */;
+short int var10 /* : Bool */;
+short int var12 /* : Bool */;
+int cltype13;
+int idtype14;
+const char* var_class_name15;
+short int var16 /* : Bool */;
+long var17 /* : Int */;
+long var19 /* : Int */;
 /* Covariant cast for argument 0 (i) <p0:Int> isa OTHER */
 /* <p0:Int> isa OTHER */
 var1 = 1; /* easy <p0:Int> isa OTHER*/
-if (!var1) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 285);
-exit(1);
+if (unlikely(!var1)) {
+var_class_name = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 398);
+show_backtrace(1);
 }
 var_i = p0;
-{ /* Inline kernel#Int#- (self,var_i) */
-var4 = self - var_i;
-var2 = var4;
+{
+{ /* Inline kernel#Int#- (self,var_i) on <self:Int> */
+/* Covariant cast for argument 0 (i) <var_i:Int> isa OTHER */
+/* <var_i:Int> isa OTHER */
+var4 = 1; /* easy <var_i:Int> isa OTHER*/
+if (unlikely(!var4)) {
+var_class_name7 = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name7);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 377);
+show_backtrace(1);
+}
+var8 = self - var_i;
+var2 = var8;
 goto RET_LABEL3;
 RET_LABEL3:(void)0;
 }
+}
 var_d = var2;
-var5 = 0;
-{ /* Inline kernel#Int#>= (var_d,var5) */
-/* Covariant cast for argument 0 (i) <var5:Int> isa OTHER */
-/* <var5:Int> isa OTHER */
-var8 = 1; /* easy <var5:Int> isa OTHER*/
-if (!var8) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 258);
-exit(1);
+var9 = 0;
+{
+{ /* Inline kernel#Int#>= (var_d,var9) on <var_d:Int> */
+/* Covariant cast for argument 0 (i) <var9:Int> isa OTHER */
+/* <var9:Int> isa OTHER */
+var12 = 1; /* easy <var9:Int> isa OTHER*/
+if (unlikely(!var12)) {
+var_class_name15 = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name15);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 372);
+show_backtrace(1);
+}
+var16 = var_d >= var9;
+var10 = var16;
+goto RET_LABEL11;
+RET_LABEL11:(void)0;
 }
-var11 = var_d >= var5;
-var6 = var11;
-goto RET_LABEL7;
-RET_LABEL7:(void)0;
 }
-if (var6){
+if (var10){
 var = var_d;
 goto RET_LABEL;
 } else {
-{ /* Inline kernel#Int#unary - (var_d) */
-var14 = -var_d;
-var12 = var14;
-goto RET_LABEL13;
-RET_LABEL13:(void)0;
+{
+{ /* Inline kernel#Int#unary - (var_d) on <var_d:Int> */
+var19 = -var_d;
+var17 = var19;
+goto RET_LABEL18;
+RET_LABEL18:(void)0;
 }
-var = var12;
+}
+var = var17;
 goto RET_LABEL;
 }
 RET_LABEL:;
@@ -2025,74 +2311,89 @@ long var /* : Int */;
 short int var1 /* : Bool */;
 int cltype;
 int idtype;
+const char* var_class_name;
 long var_other /* var other: Int */;
 short int var2 /* : Bool */;
 short int var4 /* : Bool */;
 int cltype5;
 int idtype6;
-short int var7 /* : Bool */;
-long var8 /* : Int */;
+const char* var_class_name7;
+short int var8 /* : Bool */;
 long var9 /* : Int */;
-long var11 /* : Int */;
-short int var12 /* : Bool */;
-short int var14 /* : Bool */;
-int cltype15;
-int idtype16;
-short int var17 /* : Bool */;
-long var18 /* : Int */;
-long var19 /* : Int */;
+long var10 /* : Int */;
+long var12 /* : Int */;
+short int var13 /* : Bool */;
+short int var15 /* : Bool */;
+int cltype16;
+int idtype17;
+const char* var_class_name18;
+short int var19 /* : Bool */;
+long var20 /* : Int */;
+long var21 /* : Int */;
 /* Covariant cast for argument 0 (other) <p0:Int> isa OTHER */
 /* <p0:Int> isa OTHER */
 var1 = 1; /* easy <p0:Int> isa OTHER*/
-if (!var1) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 295);
-exit(1);
+if (unlikely(!var1)) {
+var_class_name = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 408);
+show_backtrace(1);
 }
 var_other = p0;
-{ /* Inline kernel#Int#< (self,var_other) */
+{
+{ /* Inline kernel#Int#< (self,var_other) on <self:Int> */
 /* Covariant cast for argument 0 (i) <var_other:Int> isa OTHER */
 /* <var_other:Int> isa OTHER */
 var4 = 1; /* easy <var_other:Int> isa OTHER*/
-if (!var4) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 257);
-exit(1);
-}
-var7 = self < var_other;
-var2 = var7;
+if (unlikely(!var4)) {
+var_class_name7 = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name7);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 371);
+show_backtrace(1);
+}
+var8 = self < var_other;
+var2 = var8;
 goto RET_LABEL3;
 RET_LABEL3:(void)0;
 }
+}
 if (var2){
-var8 = 1;
-{ /* Inline kernel#Int#unary - (var8) */
-var11 = -var8;
-var9 = var11;
-goto RET_LABEL10;
-RET_LABEL10:(void)0;
+var9 = 1;
+{
+{ /* Inline kernel#Int#unary - (var9) on <var9:Int> */
+var12 = -var9;
+var10 = var12;
+goto RET_LABEL11;
+RET_LABEL11:(void)0;
 }
-var = var9;
+}
+var = var10;
 goto RET_LABEL;
 } else {
-{ /* Inline kernel#Int#< (var_other,self) */
+{
+{ /* Inline kernel#Int#< (var_other,self) on <var_other:Int> */
 /* Covariant cast for argument 0 (i) <self:Int> isa OTHER */
 /* <self:Int> isa OTHER */
-var14 = 1; /* easy <self:Int> isa OTHER*/
-if (!var14) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 257);
-exit(1);
+var15 = 1; /* easy <self:Int> isa OTHER*/
+if (unlikely(!var15)) {
+var_class_name18 = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name18);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 371);
+show_backtrace(1);
 }
-var17 = var_other < self;
-var12 = var17;
-goto RET_LABEL13;
-RET_LABEL13:(void)0;
+var19 = var_other < self;
+var13 = var19;
+goto RET_LABEL14;
+RET_LABEL14:(void)0;
 }
-if (var12){
-var18 = 1;
-var = var18;
+}
+if (var13){
+var20 = 1;
+var = var20;
 goto RET_LABEL;
 } else {
-var19 = 0;
-var = var19;
+var21 = 0;
+var = var21;
 goto RET_LABEL;
 }
 }
@@ -2112,222 +2413,6 @@ var = var1;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Int#is_between for (self: Int, Int, Int): Bool */
-short int kernel__Int__is_between(long self, long p0, long p1) {
-short int var /* : Bool */;
-short int var1 /* : Bool */;
-int cltype;
-int idtype;
-short int var2 /* : Bool */;
-int cltype3;
-int idtype4;
-long var_c /* var c: Int */;
-long var_d /* var d: Int */;
-short int var5 /* : Bool */;
-short int var6 /* : Bool */;
-short int var8 /* : Bool */;
-int cltype9;
-int idtype10;
-short int var11 /* : Bool */;
-short int var_ /* var : Bool */;
-short int var12 /* : Bool */;
-short int var14 /* : Bool */;
-int cltype15;
-int idtype16;
-short int var17 /* : Bool */;
-short int var18 /* : Bool */;
-short int var19 /* : Bool */;
-/* Covariant cast for argument 0 (c) <p0:Int> isa OTHER */
-/* <p0:Int> isa OTHER */
-var1 = 1; /* easy <p0:Int> isa OTHER*/
-if (!var1) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 306);
-exit(1);
-}
-/* Covariant cast for argument 1 (d) <p1:Int> isa OTHER */
-/* <p1:Int> isa OTHER */
-var2 = 1; /* easy <p1:Int> isa OTHER*/
-if (!var2) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 306);
-exit(1);
-}
-var_c = p0;
-var_d = p1;
-{ /* Inline kernel#Int#< (self,var_c) */
-/* Covariant cast for argument 0 (i) <var_c:Int> isa OTHER */
-/* <var_c:Int> isa OTHER */
-var8 = 1; /* easy <var_c:Int> isa OTHER*/
-if (!var8) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 257);
-exit(1);
-}
-var11 = self < var_c;
-var6 = var11;
-goto RET_LABEL7;
-RET_LABEL7:(void)0;
-}
-var_ = var6;
-if (var6){
-var5 = var_;
-} else {
-{ /* Inline kernel#Int#< (var_d,self) */
-/* Covariant cast for argument 0 (i) <self:Int> isa OTHER */
-/* <self:Int> isa OTHER */
-var14 = 1; /* easy <self:Int> isa OTHER*/
-if (!var14) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 257);
-exit(1);
-}
-var17 = var_d < self;
-var12 = var17;
-goto RET_LABEL13;
-RET_LABEL13:(void)0;
-}
-var5 = var12;
-}
-if (var5){
-var18 = 0;
-var = var18;
-goto RET_LABEL;
-} else {
-var19 = 1;
-var = var19;
-goto RET_LABEL;
-}
-RET_LABEL:;
-return var;
-}
-/* method kernel#Int#is_between for (self: Object, Comparable, Comparable): Bool */
-short int VIRTUAL_kernel__Int__is_between(val* self, val* p0, val* p1) {
-short int var /* : Bool */;
-short int var1 /* : Bool */;
-long var2 /* : Int */;
-long var3 /* : Int */;
-long var4 /* : Int */;
-var2 = ((struct instance_kernel__Int*)self)->value; /* autounbox from Object to Int */;
-var3 = ((struct instance_kernel__Int*)p0)->value; /* autounbox from Comparable to Int */;
-var4 = ((struct instance_kernel__Int*)p1)->value; /* autounbox from Comparable to Int */;
-var1 = kernel__Int__is_between(var2, var3, var4);
-var = var1;
-RET_LABEL:;
-return var;
-}
-/* method kernel#Int#max for (self: Int, Int): Int */
-long kernel__Int__max(long self, long p0) {
-long var /* : Int */;
-short int var1 /* : Bool */;
-int cltype;
-int idtype;
-long var_other /* var other: Int */;
-short int var2 /* : Bool */;
-short int var4 /* : Bool */;
-int cltype5;
-int idtype6;
-short int var7 /* : Bool */;
-/* Covariant cast for argument 0 (other) <p0:Int> isa OTHER */
-/* <p0:Int> isa OTHER */
-var1 = 1; /* easy <p0:Int> isa OTHER*/
-if (!var1) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 315);
-exit(1);
-}
-var_other = p0;
-{ /* Inline kernel#Int#< (self,var_other) */
-/* Covariant cast for argument 0 (i) <var_other:Int> isa OTHER */
-/* <var_other:Int> isa OTHER */
-var4 = 1; /* easy <var_other:Int> isa OTHER*/
-if (!var4) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 257);
-exit(1);
-}
-var7 = self < var_other;
-var2 = var7;
-goto RET_LABEL3;
-RET_LABEL3:(void)0;
-}
-if (var2){
-var = var_other;
-goto RET_LABEL;
-} else {
-var = self;
-goto RET_LABEL;
-}
-RET_LABEL:;
-return var;
-}
-/* method kernel#Int#max for (self: Object, Comparable): Comparable */
-val* VIRTUAL_kernel__Int__max(val* self, val* p0) {
-val* var /* : Comparable */;
-long var1 /* : Int */;
-long var2 /* : Int */;
-long var3 /* : Int */;
-val* var4 /* : Comparable */;
-var2 = ((struct instance_kernel__Int*)self)->value; /* autounbox from Object to Int */;
-var3 = ((struct instance_kernel__Int*)p0)->value; /* autounbox from Comparable to Int */;
-var1 = kernel__Int__max(var2, var3);
-var4 = BOX_kernel__Int(var1); /* autobox from Int to Comparable */
-var = var4;
-RET_LABEL:;
-return var;
-}
-/* method kernel#Int#min for (self: Int, Int): Int */
-long kernel__Int__min(long self, long p0) {
-long var /* : Int */;
-short int var1 /* : Bool */;
-int cltype;
-int idtype;
-long var_c /* var c: Int */;
-short int var2 /* : Bool */;
-short int var4 /* : Bool */;
-int cltype5;
-int idtype6;
-short int var7 /* : Bool */;
-/* Covariant cast for argument 0 (c) <p0:Int> isa OTHER */
-/* <p0:Int> isa OTHER */
-var1 = 1; /* easy <p0:Int> isa OTHER*/
-if (!var1) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 324);
-exit(1);
-}
-var_c = p0;
-{ /* Inline kernel#Int#< (var_c,self) */
-/* Covariant cast for argument 0 (i) <self:Int> isa OTHER */
-/* <self:Int> isa OTHER */
-var4 = 1; /* easy <self:Int> isa OTHER*/
-if (!var4) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 257);
-exit(1);
-}
-var7 = var_c < self;
-var2 = var7;
-goto RET_LABEL3;
-RET_LABEL3:(void)0;
-}
-if (var2){
-var = var_c;
-goto RET_LABEL;
-} else {
-var = self;
-goto RET_LABEL;
-}
-RET_LABEL:;
-return var;
-}
-/* method kernel#Int#min for (self: Object, Comparable): Comparable */
-val* VIRTUAL_kernel__Int__min(val* self, val* p0) {
-val* var /* : Comparable */;
-long var1 /* : Int */;
-long var2 /* : Int */;
-long var3 /* : Int */;
-val* var4 /* : Comparable */;
-var2 = ((struct instance_kernel__Int*)self)->value; /* autounbox from Object to Int */;
-var3 = ((struct instance_kernel__Int*)p0)->value; /* autounbox from Comparable to Int */;
-var1 = kernel__Int__min(var2, var3);
-var4 = BOX_kernel__Int(var1); /* autobox from Int to Comparable */
-var = var4;
-RET_LABEL:;
-return var;
-}
 /* method kernel#Int#ascii for (self: Int): Char */
 char kernel__Int__ascii(long self) {
 char var /* : Char */;
@@ -2344,7 +2429,7 @@ char var /* : Char */;
 char var1 /* : Char */;
 long var3 /* : Int */;
 char var4 /* : Char */;
-{ /* Inline kernel#Int#ascii (self) */
+{ /* Inline kernel#Int#ascii (self) on <self:Object(Int)> */
 var3 = ((struct instance_kernel__Int*)self)->value; /* autounbox from Object to Int */;
 var4 = var3;
 var1 = var4;
@@ -2361,123 +2446,177 @@ long var /* : Int */;
 long var_b /* var b: Int */;
 long var1 /* : Int */;
 short int var2 /* : Bool */;
-short int var4 /* : Bool */;
-long var5 /* : Int */;
+short int var3 /* : Bool */;
+short int var5 /* : Bool */;
 long var6 /* : Int */;
-short int var7 /* : Bool */;
-short int var9 /* : Bool */;
+long var7 /* : Int */;
+short int var8 /* : Bool */;
+short int var10 /* : Bool */;
 int cltype;
 int idtype;
-short int var10 /* : Bool */;
-long var11 /* : Int */;
-long var_d /* var d: Int */;
+const char* var_class_name;
+short int var11 /* : Bool */;
 long var12 /* : Int */;
-long var14 /* : Int */;
-long var_n /* var n: Int */;
+long var_d /* var d: Int */;
+long var13 /* : Int */;
 long var15 /* : Int */;
-short int var16 /* : Bool */;
+long var_n /* var n: Int */;
+long var16 /* : Int */;
+short int var17 /* : Bool */;
 short int var18 /* : Bool */;
-long var19 /* : Int */;
-long var20 /* : Int */;
+short int var20 /* : Bool */;
 long var21 /* : Int */;
-short int var22 /* : Bool */;
+long var22 /* : Int */;
+long var23 /* : Int */;
 short int var24 /* : Bool */;
-int cltype25;
-int idtype26;
-short int var27 /* : Bool */;
-long var28 /* : Int */;
-long var29 /* : Int */;
+short int var26 /* : Bool */;
+int cltype27;
+int idtype28;
+const char* var_class_name29;
+short int var30 /* : Bool */;
 long var31 /* : Int */;
 long var32 /* : Int */;
-long var34 /* : Int */;
+short int var34 /* : Bool */;
+int cltype35;
+int idtype36;
+const char* var_class_name37;
+long var38 /* : Int */;
+long var39 /* : Int */;
+short int var41 /* : Bool */;
+int cltype42;
+int idtype43;
+const char* var_class_name44;
+long var45 /* : Int */;
 var_b = p0;
 var1 = 10;
-{ /* Inline kernel#Int#== (var_b,var1) */
-var4 = var_b == var1;
-var2 = var4;
-goto RET_LABEL3;
-RET_LABEL3:(void)0;
+{
+{ /* Inline kernel#Int#== (var_b,var1) on <var_b:Int> */
+var5 = var_b == var1;
+var3 = var5;
+goto RET_LABEL4;
+RET_LABEL4:(void)0;
+}
+var2 = var3;
 }
 if (var2){
-var5 = kernel__Int__digit_count_base_95d10(self);
-var = var5;
+{
+var6 = kernel__Int__digit_count_base_95d10(self);
+}
+var = var6;
 goto RET_LABEL;
 } else {
 }
-var6 = 0;
-{ /* Inline kernel#Int#< (self,var6) */
-/* Covariant cast for argument 0 (i) <var6:Int> isa OTHER */
-/* <var6:Int> isa OTHER */
-var9 = 1; /* easy <var6:Int> isa OTHER*/
-if (!var9) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 257);
-exit(1);
-}
-var10 = self < var6;
-var7 = var10;
-goto RET_LABEL8;
-RET_LABEL8:(void)0;
+var7 = 0;
+{
+{ /* Inline kernel#Int#< (self,var7) on <self:Int> */
+/* Covariant cast for argument 0 (i) <var7:Int> isa OTHER */
+/* <var7:Int> isa OTHER */
+var10 = 1; /* easy <var7:Int> isa OTHER*/
+if (unlikely(!var10)) {
+var_class_name = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 371);
+show_backtrace(1);
+}
+var11 = self < var7;
+var8 = var11;
+goto RET_LABEL9;
+RET_LABEL9:(void)0;
 }
-if (var7){
-var11 = 1;
-var_d = var11;
-{ /* Inline kernel#Int#unary - (self) */
-var14 = -self;
-var12 = var14;
-goto RET_LABEL13;
-RET_LABEL13:(void)0;
 }
-var_n = var12;
+if (var8){
+var12 = 1;
+var_d = var12;
+{
+{ /* Inline kernel#Int#unary - (self) on <self:Int> */
+var15 = -self;
+var13 = var15;
+goto RET_LABEL14;
+RET_LABEL14:(void)0;
+}
+}
+var_n = var13;
 } else {
-var15 = 0;
-{ /* Inline kernel#Int#== (self,var15) */
-var18 = self == var15;
-var16 = var18;
-goto RET_LABEL17;
-RET_LABEL17:(void)0;
+var16 = 0;
+{
+{ /* Inline kernel#Int#== (self,var16) on <self:Int> */
+var20 = self == var16;
+var18 = var20;
+goto RET_LABEL19;
+RET_LABEL19:(void)0;
 }
-if (var16){
-var19 = 1;
-var = var19;
+var17 = var18;
+}
+if (var17){
+var21 = 1;
+var = var21;
 goto RET_LABEL;
 } else {
-var20 = 0;
-var_d = var20;
+var22 = 0;
+var_d = var22;
 var_n = self;
 }
 }
 for(;;) {
-var21 = 0;
-{ /* Inline kernel#Int#> (var_n,var21) */
-/* Covariant cast for argument 0 (i) <var21:Int> isa OTHER */
-/* <var21:Int> isa OTHER */
-var24 = 1; /* easy <var21:Int> isa OTHER*/
-if (!var24) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 259);
-exit(1);
-}
-var27 = var_n > var21;
-var22 = var27;
-goto RET_LABEL23;
-RET_LABEL23:(void)0;
-}
-if (!var22) break;
-var28 = 1;
-{ /* Inline kernel#Int#+ (var_d,var28) */
-var31 = var_d + var28;
-var29 = var31;
-goto RET_LABEL30;
-RET_LABEL30:(void)0;
-}
-var_d = var29;
-{ /* Inline kernel#Int#/ (var_n,var_b) */
-var34 = var_n / var_b;
-var32 = var34;
+var23 = 0;
+{
+{ /* Inline kernel#Int#> (var_n,var23) on <var_n:Int> */
+/* Covariant cast for argument 0 (i) <var23:Int> isa OTHER */
+/* <var23:Int> isa OTHER */
+var26 = 1; /* easy <var23:Int> isa OTHER*/
+if (unlikely(!var26)) {
+var_class_name29 = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name29);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 373);
+show_backtrace(1);
+}
+var30 = var_n > var23;
+var24 = var30;
+goto RET_LABEL25;
+RET_LABEL25:(void)0;
+}
+}
+if (var24){
+var31 = 1;
+{
+{ /* Inline kernel#Int#+ (var_d,var31) on <var_d:Int> */
+/* Covariant cast for argument 0 (i) <var31:Int> isa OTHER */
+/* <var31:Int> isa OTHER */
+var34 = 1; /* easy <var31:Int> isa OTHER*/
+if (unlikely(!var34)) {
+var_class_name37 = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name37);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 374);
+show_backtrace(1);
+}
+var38 = var_d + var31;
+var32 = var38;
 goto RET_LABEL33;
 RET_LABEL33:(void)0;
 }
-var_n = var32;
-CONTINUE_label: (void)0;
+}
+var_d = var32;
+{
+{ /* Inline kernel#Int#/ (var_n,var_b) on <var_n:Int> */
+/* Covariant cast for argument 0 (i) <var_b:Int> isa OTHER */
+/* <var_b:Int> isa OTHER */
+var41 = 1; /* easy <var_b:Int> isa OTHER*/
+if (unlikely(!var41)) {
+var_class_name44 = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name44);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 379);
+show_backtrace(1);
+}
+var45 = var_n / var_b;
+var39 = var45;
+goto RET_LABEL40;
+RET_LABEL40:(void)0;
+}
+}
+var_n = var39;
+} else {
+goto BREAK_label;
+}
 }
 BREAK_label: (void)0;
 var = var_d;
@@ -2504,6 +2643,7 @@ short int var2 /* : Bool */;
 short int var4 /* : Bool */;
 int cltype;
 int idtype;
+const char* var_class_name;
 short int var5 /* : Bool */;
 long var6 /* : Int */;
 long var_result /* var result: Int */;
@@ -2516,63 +2656,93 @@ short int var12 /* : Bool */;
 short int var14 /* : Bool */;
 int cltype15;
 int idtype16;
-short int var17 /* : Bool */;
-long var18 /* : Int */;
-short int var19 /* : Bool */;
-short int var21 /* : Bool */;
-int cltype22;
-int idtype23;
-short int var24 /* : Bool */;
-long var25 /* : Int */;
-long var26 /* : Int */;
+const char* var_class_name17;
+short int var18 /* : Bool */;
+long var19 /* : Int */;
+short int var20 /* : Bool */;
+short int var22 /* : Bool */;
+int cltype23;
+int idtype24;
+const char* var_class_name25;
+short int var26 /* : Bool */;
+long var27 /* : Int */;
 long var28 /* : Int */;
-long var29 /* : Int */;
 short int var30 /* : Bool */;
-short int var32 /* : Bool */;
-int cltype33;
-int idtype34;
-short int var35 /* : Bool */;
-long var36 /* : Int */;
-long var37 /* : Int */;
-long var39 /* : Int */;
-long var40 /* : Int */;
-short int var41 /* : Bool */;
-short int var43 /* : Bool */;
-int cltype44;
-int idtype45;
+int cltype31;
+int idtype32;
+const char* var_class_name33;
+long var34 /* : Int */;
+long var35 /* : Int */;
+short int var36 /* : Bool */;
+short int var38 /* : Bool */;
+int cltype39;
+int idtype40;
+const char* var_class_name41;
+short int var42 /* : Bool */;
+long var43 /* : Int */;
+long var44 /* : Int */;
 short int var46 /* : Bool */;
-long var47 /* : Int */;
-long var48 /* : Int */;
+int cltype47;
+int idtype48;
+const char* var_class_name49;
 long var50 /* : Int */;
 long var51 /* : Int */;
-long var52 /* : Int */;
-long var54 /* : Int */;
-long var55 /* : Int */;
-long var56 /* : Int */;
-long var58 /* : Int */;
+short int var52 /* : Bool */;
+short int var54 /* : Bool */;
+int cltype55;
+int idtype56;
+const char* var_class_name57;
+short int var58 /* : Bool */;
+long var59 /* : Int */;
+long var60 /* : Int */;
+short int var62 /* : Bool */;
+int cltype63;
+int idtype64;
+const char* var_class_name65;
+long var66 /* : Int */;
+long var67 /* : Int */;
+long var68 /* : Int */;
+short int var70 /* : Bool */;
+int cltype71;
+int idtype72;
+const char* var_class_name73;
+long var74 /* : Int */;
+long var75 /* : Int */;
+long var76 /* : Int */;
+short int var78 /* : Bool */;
+int cltype79;
+int idtype80;
+const char* var_class_name81;
+long var82 /* : Int */;
 var1 = 0;
-{ /* Inline kernel#Int#< (self,var1) */
+{
+{ /* Inline kernel#Int#< (self,var1) on <self:Int> */
 /* Covariant cast for argument 0 (i) <var1:Int> isa OTHER */
 /* <var1:Int> isa OTHER */
 var4 = 1; /* easy <var1:Int> isa OTHER*/
-if (!var4) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 257);
-exit(1);
+if (unlikely(!var4)) {
+var_class_name = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 371);
+show_backtrace(1);
 }
 var5 = self < var1;
 var2 = var5;
 goto RET_LABEL3;
 RET_LABEL3:(void)0;
 }
+}
 if (var2){
 var6 = 2;
 var_result = var6;
-{ /* Inline kernel#Int#unary - (self) */
+{
+{ /* Inline kernel#Int#unary - (self) on <self:Int> */
 var9 = -self;
 var7 = var9;
 goto RET_LABEL8;
 RET_LABEL8:(void)0;
 }
+}
 var_val = var7;
 } else {
 var10 = 1;
@@ -2581,121 +2751,190 @@ var_val = self;
 }
 for(;;) {
 var11 = 10;
-{ /* Inline kernel#Int#< (var_val,var11) */
+{
+{ /* Inline kernel#Int#< (var_val,var11) on <var_val:Int> */
 /* Covariant cast for argument 0 (i) <var11:Int> isa OTHER */
 /* <var11:Int> isa OTHER */
 var14 = 1; /* easy <var11:Int> isa OTHER*/
-if (!var14) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 257);
-exit(1);
-}
-var17 = var_val < var11;
-var12 = var17;
+if (unlikely(!var14)) {
+var_class_name17 = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name17);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 371);
+show_backtrace(1);
+}
+var18 = var_val < var11;
+var12 = var18;
 goto RET_LABEL13;
 RET_LABEL13:(void)0;
 }
+}
 if (var12){
 var = var_result;
 goto RET_LABEL;
 } else {
 }
-var18 = 100;
-{ /* Inline kernel#Int#< (var_val,var18) */
-/* Covariant cast for argument 0 (i) <var18:Int> isa OTHER */
-/* <var18:Int> isa OTHER */
-var21 = 1; /* easy <var18:Int> isa OTHER*/
-if (!var21) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 257);
-exit(1);
-}
-var24 = var_val < var18;
-var19 = var24;
-goto RET_LABEL20;
-RET_LABEL20:(void)0;
-}
-if (var19){
-var25 = 1;
-{ /* Inline kernel#Int#+ (var_result,var25) */
-var28 = var_result + var25;
-var26 = var28;
-goto RET_LABEL27;
-RET_LABEL27:(void)0;
-}
-var = var26;
+var19 = 100;
+{
+{ /* Inline kernel#Int#< (var_val,var19) on <var_val:Int> */
+/* Covariant cast for argument 0 (i) <var19:Int> isa OTHER */
+/* <var19:Int> isa OTHER */
+var22 = 1; /* easy <var19:Int> isa OTHER*/
+if (unlikely(!var22)) {
+var_class_name25 = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name25);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 371);
+show_backtrace(1);
+}
+var26 = var_val < var19;
+var20 = var26;
+goto RET_LABEL21;
+RET_LABEL21:(void)0;
+}
+}
+if (var20){
+var27 = 1;
+{
+{ /* Inline kernel#Int#+ (var_result,var27) on <var_result:Int> */
+/* Covariant cast for argument 0 (i) <var27:Int> isa OTHER */
+/* <var27:Int> isa OTHER */
+var30 = 1; /* easy <var27:Int> isa OTHER*/
+if (unlikely(!var30)) {
+var_class_name33 = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name33);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 374);
+show_backtrace(1);
+}
+var34 = var_result + var27;
+var28 = var34;
+goto RET_LABEL29;
+RET_LABEL29:(void)0;
+}
+}
+var = var28;
 goto RET_LABEL;
 } else {
 }
-var29 = 1000;
-{ /* Inline kernel#Int#< (var_val,var29) */
-/* Covariant cast for argument 0 (i) <var29:Int> isa OTHER */
-/* <var29:Int> isa OTHER */
-var32 = 1; /* easy <var29:Int> isa OTHER*/
-if (!var32) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 257);
-exit(1);
-}
-var35 = var_val < var29;
-var30 = var35;
-goto RET_LABEL31;
-RET_LABEL31:(void)0;
+var35 = 1000;
+{
+{ /* Inline kernel#Int#< (var_val,var35) on <var_val:Int> */
+/* Covariant cast for argument 0 (i) <var35:Int> isa OTHER */
+/* <var35:Int> isa OTHER */
+var38 = 1; /* easy <var35:Int> isa OTHER*/
+if (unlikely(!var38)) {
+var_class_name41 = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name41);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 371);
+show_backtrace(1);
+}
+var42 = var_val < var35;
+var36 = var42;
+goto RET_LABEL37;
+RET_LABEL37:(void)0;
 }
-if (var30){
-var36 = 2;
-{ /* Inline kernel#Int#+ (var_result,var36) */
-var39 = var_result + var36;
-var37 = var39;
-goto RET_LABEL38;
-RET_LABEL38:(void)0;
 }
-var = var37;
-goto RET_LABEL;
-} else {
+if (var36){
+var43 = 2;
+{
+{ /* Inline kernel#Int#+ (var_result,var43) on <var_result:Int> */
+/* Covariant cast for argument 0 (i) <var43:Int> isa OTHER */
+/* <var43:Int> isa OTHER */
+var46 = 1; /* easy <var43:Int> isa OTHER*/
+if (unlikely(!var46)) {
+var_class_name49 = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name49);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 374);
+show_backtrace(1);
+}
+var50 = var_result + var43;
+var44 = var50;
+goto RET_LABEL45;
+RET_LABEL45:(void)0;
 }
-var40 = 10000;
-{ /* Inline kernel#Int#< (var_val,var40) */
-/* Covariant cast for argument 0 (i) <var40:Int> isa OTHER */
-/* <var40:Int> isa OTHER */
-var43 = 1; /* easy <var40:Int> isa OTHER*/
-if (!var43) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 257);
-exit(1);
-}
-var46 = var_val < var40;
-var41 = var46;
-goto RET_LABEL42;
-RET_LABEL42:(void)0;
-}
-if (var41){
-var47 = 3;
-{ /* Inline kernel#Int#+ (var_result,var47) */
-var50 = var_result + var47;
-var48 = var50;
-goto RET_LABEL49;
-RET_LABEL49:(void)0;
-}
-var = var48;
+}
+var = var44;
 goto RET_LABEL;
 } else {
 }
 var51 = 10000;
-{ /* Inline kernel#Int#/ (var_val,var51) */
-var54 = var_val / var51;
-var52 = var54;
+{
+{ /* Inline kernel#Int#< (var_val,var51) on <var_val:Int> */
+/* Covariant cast for argument 0 (i) <var51:Int> isa OTHER */
+/* <var51:Int> isa OTHER */
+var54 = 1; /* easy <var51:Int> isa OTHER*/
+if (unlikely(!var54)) {
+var_class_name57 = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name57);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 371);
+show_backtrace(1);
+}
+var58 = var_val < var51;
+var52 = var58;
 goto RET_LABEL53;
 RET_LABEL53:(void)0;
 }
-var_val = var52;
-var55 = 4;
-{ /* Inline kernel#Int#+ (var_result,var55) */
-var58 = var_result + var55;
-var56 = var58;
-goto RET_LABEL57;
-RET_LABEL57:(void)0;
 }
-var_result = var56;
-CONTINUE_label: (void)0;
+if (var52){
+var59 = 3;
+{
+{ /* Inline kernel#Int#+ (var_result,var59) on <var_result:Int> */
+/* Covariant cast for argument 0 (i) <var59:Int> isa OTHER */
+/* <var59:Int> isa OTHER */
+var62 = 1; /* easy <var59:Int> isa OTHER*/
+if (unlikely(!var62)) {
+var_class_name65 = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name65);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 374);
+show_backtrace(1);
+}
+var66 = var_result + var59;
+var60 = var66;
+goto RET_LABEL61;
+RET_LABEL61:(void)0;
+}
+}
+var = var60;
+goto RET_LABEL;
+} else {
+}
+var67 = 10000;
+{
+{ /* Inline kernel#Int#/ (var_val,var67) on <var_val:Int> */
+/* Covariant cast for argument 0 (i) <var67:Int> isa OTHER */
+/* <var67:Int> isa OTHER */
+var70 = 1; /* easy <var67:Int> isa OTHER*/
+if (unlikely(!var70)) {
+var_class_name73 = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name73);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 379);
+show_backtrace(1);
+}
+var74 = var_val / var67;
+var68 = var74;
+goto RET_LABEL69;
+RET_LABEL69:(void)0;
+}
+}
+var_val = var68;
+var75 = 4;
+{
+{ /* Inline kernel#Int#+ (var_result,var75) on <var_result:Int> */
+/* Covariant cast for argument 0 (i) <var75:Int> isa OTHER */
+/* <var75:Int> isa OTHER */
+var78 = 1; /* easy <var75:Int> isa OTHER*/
+if (unlikely(!var78)) {
+var_class_name81 = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name81);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 374);
+show_backtrace(1);
+}
+var82 = var_result + var75;
+var76 = var82;
+goto RET_LABEL77;
+RET_LABEL77:(void)0;
+}
+}
+var_result = var76;
 }
-BREAK_label: (void)0;
 RET_LABEL:;
 return var;
 }
@@ -2719,6 +2958,7 @@ short int var3 /* : Bool */;
 short int var5 /* : Bool */;
 int cltype;
 int idtype;
+const char* var_class_name;
 short int var6 /* : Bool */;
 short int var_ /* var : Bool */;
 long var7 /* : Int */;
@@ -2726,132 +2966,200 @@ short int var8 /* : Bool */;
 short int var10 /* : Bool */;
 int cltype11;
 int idtype12;
-short int var13 /* : Bool */;
-long var14 /* : Int */;
-short int var15 /* : Bool */;
-short int var17 /* : Bool */;
-int cltype18;
-int idtype19;
-short int var20 /* : Bool */;
-char var21 /* : Char */;
-long var22 /* : Int */;
+const char* var_class_name13;
+short int var14 /* : Bool */;
+long var15 /* : Int */;
+short int var16 /* : Bool */;
+short int var18 /* : Bool */;
+int cltype19;
+int idtype20;
+const char* var_class_name21;
+short int var22 /* : Bool */;
+char var23 /* : Char */;
 long var24 /* : Int */;
-long var25 /* : Int */;
+long var26 /* : Int */;
 long var27 /* : Int */;
-char var28 /* : Char */;
-char var30 /* : Char */;
-char var31 /* : Char */;
-long var32 /* : Int */;
-long var34 /* : Int */;
-long var35 /* : Int */;
-long var36 /* : Int */;
+short int var29 /* : Bool */;
+int cltype30;
+int idtype31;
+const char* var_class_name32;
+long var33 /* : Int */;
+char var34 /* : Char */;
+char var36 /* : Char */;
+char var37 /* : Char */;
 long var38 /* : Int */;
-long var39 /* : Int */;
+long var40 /* : Int */;
 long var41 /* : Int */;
-char var42 /* : Char */;
-char var44 /* : Char */;
+long var42 /* : Int */;
+short int var44 /* : Bool */;
+int cltype45;
+int idtype46;
+const char* var_class_name47;
+long var48 /* : Int */;
+long var49 /* : Int */;
+short int var51 /* : Bool */;
+int cltype52;
+int idtype53;
+const char* var_class_name54;
+long var55 /* : Int */;
+char var56 /* : Char */;
+char var58 /* : Char */;
 var2 = 0;
-{ /* Inline kernel#Int#>= (self,var2) */
+{
+{ /* Inline kernel#Int#>= (self,var2) on <self:Int> */
 /* Covariant cast for argument 0 (i) <var2:Int> isa OTHER */
 /* <var2:Int> isa OTHER */
 var5 = 1; /* easy <var2:Int> isa OTHER*/
-if (!var5) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 258);
-exit(1);
+if (unlikely(!var5)) {
+var_class_name = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 372);
+show_backtrace(1);
 }
 var6 = self >= var2;
 var3 = var6;
 goto RET_LABEL4;
 RET_LABEL4:(void)0;
 }
+}
 var_ = var3;
 if (var3){
 var7 = 36;
-{ /* Inline kernel#Int#<= (self,var7) */
+{
+{ /* Inline kernel#Int#<= (self,var7) on <self:Int> */
 /* Covariant cast for argument 0 (i) <var7:Int> isa OTHER */
 /* <var7:Int> isa OTHER */
 var10 = 1; /* easy <var7:Int> isa OTHER*/
-if (!var10) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 256);
-exit(1);
-}
-var13 = self <= var7;
-var8 = var13;
+if (unlikely(!var10)) {
+var_class_name13 = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name13);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 370);
+show_backtrace(1);
+}
+var14 = self <= var7;
+var8 = var14;
 goto RET_LABEL9;
 RET_LABEL9:(void)0;
 }
+}
 var1 = var8;
 } else {
 var1 = var_;
 }
-if (!var1) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Assert failed", "lib/standard/kernel.nit", 395);
-exit(1);
-}
-var14 = 10;
-{ /* Inline kernel#Int#< (self,var14) */
-/* Covariant cast for argument 0 (i) <var14:Int> isa OTHER */
-/* <var14:Int> isa OTHER */
-var17 = 1; /* easy <var14:Int> isa OTHER*/
-if (!var17) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 257);
-exit(1);
-}
-var20 = self < var14;
-var15 = var20;
-goto RET_LABEL16;
-RET_LABEL16:(void)0;
+if (unlikely(!var1)) {
+PRINT_ERROR("Runtime error: %s", "Assert failed");
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 508);
+show_backtrace(1);
+}
+var15 = 10;
+{
+{ /* Inline kernel#Int#< (self,var15) on <self:Int> */
+/* Covariant cast for argument 0 (i) <var15:Int> isa OTHER */
+/* <var15:Int> isa OTHER */
+var18 = 1; /* easy <var15:Int> isa OTHER*/
+if (unlikely(!var18)) {
+var_class_name21 = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name21);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 371);
+show_backtrace(1);
+}
+var22 = self < var15;
+var16 = var22;
+goto RET_LABEL17;
+RET_LABEL17:(void)0;
 }
-if (var15){
-var21 = '0';
-{ /* Inline kernel#Char#ascii (var21) */
-var24 = (unsigned char)var21;
-var22 = var24;
-goto RET_LABEL23;
-RET_LABEL23:(void)0;
-}
-{ /* Inline kernel#Int#+ (self,var22) */
-var27 = self + var22;
-var25 = var27;
-goto RET_LABEL26;
-RET_LABEL26:(void)0;
-}
-{ /* Inline kernel#Int#ascii (var25) */
-var30 = var25;
-var28 = var30;
-goto RET_LABEL29;
-RET_LABEL29:(void)0;
 }
-var = var28;
+if (var16){
+var23 = '0';
+{
+{ /* Inline kernel#Char#ascii (var23) on <var23:Char> */
+var26 = (unsigned char)var23;
+var24 = var26;
+goto RET_LABEL25;
+RET_LABEL25:(void)0;
+}
+}
+{
+{ /* Inline kernel#Int#+ (self,var24) on <self:Int> */
+/* Covariant cast for argument 0 (i) <var24:Int> isa OTHER */
+/* <var24:Int> isa OTHER */
+var29 = 1; /* easy <var24:Int> isa OTHER*/
+if (unlikely(!var29)) {
+var_class_name32 = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name32);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 374);
+show_backtrace(1);
+}
+var33 = self + var24;
+var27 = var33;
+goto RET_LABEL28;
+RET_LABEL28:(void)0;
+}
+}
+{
+{ /* Inline kernel#Int#ascii (var27) on <var27:Int> */
+var36 = var27;
+var34 = var36;
+goto RET_LABEL35;
+RET_LABEL35:(void)0;
+}
+}
+var = var34;
 goto RET_LABEL;
 } else {
-var31 = 'a';
-{ /* Inline kernel#Char#ascii (var31) */
-var34 = (unsigned char)var31;
-var32 = var34;
-goto RET_LABEL33;
-RET_LABEL33:(void)0;
+var37 = 'a';
+{
+{ /* Inline kernel#Char#ascii (var37) on <var37:Char> */
+var40 = (unsigned char)var37;
+var38 = var40;
+goto RET_LABEL39;
+RET_LABEL39:(void)0;
+}
+}
+var41 = 10;
+{
+{ /* Inline kernel#Int#- (var38,var41) on <var38:Int> */
+/* Covariant cast for argument 0 (i) <var41:Int> isa OTHER */
+/* <var41:Int> isa OTHER */
+var44 = 1; /* easy <var41:Int> isa OTHER*/
+if (unlikely(!var44)) {
+var_class_name47 = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name47);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 377);
+show_backtrace(1);
+}
+var48 = var38 - var41;
+var42 = var48;
+goto RET_LABEL43;
+RET_LABEL43:(void)0;
 }
-var35 = 10;
-{ /* Inline kernel#Int#- (var32,var35) */
-var38 = var32 - var35;
-var36 = var38;
-goto RET_LABEL37;
-RET_LABEL37:(void)0;
 }
-{ /* Inline kernel#Int#+ (self,var36) */
-var41 = self + var36;
-var39 = var41;
-goto RET_LABEL40;
-RET_LABEL40:(void)0;
+{
+{ /* Inline kernel#Int#+ (self,var42) on <self:Int> */
+/* Covariant cast for argument 0 (i) <var42:Int> isa OTHER */
+/* <var42:Int> isa OTHER */
+var51 = 1; /* easy <var42:Int> isa OTHER*/
+if (unlikely(!var51)) {
+var_class_name54 = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name54);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 374);
+show_backtrace(1);
 }
-{ /* Inline kernel#Int#ascii (var39) */
-var44 = var39;
-var42 = var44;
-goto RET_LABEL43;
-RET_LABEL43:(void)0;
+var55 = self + var42;
+var49 = var55;
+goto RET_LABEL50;
+RET_LABEL50:(void)0;
 }
-var = var42;
+}
+{
+{ /* Inline kernel#Int#ascii (var49) on <var49:Int> */
+var58 = var49;
+var56 = var58;
+goto RET_LABEL57;
+RET_LABEL57:(void)0;
+}
+}
+var = var56;
 goto RET_LABEL;
 }
 RET_LABEL:;
@@ -2868,106 +3176,6 @@ var = var1;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Int#enumerate_to for (self: Int, Int) */
-void kernel__Int__enumerate_to(long self, long p0) {
-long var_last /* var last: Int */;
-long var_cur /* var cur: Int */;
-short int var /* : Bool */;
-short int var2 /* : Bool */;
-int cltype;
-int idtype;
-short int var3 /* : Bool */;
-long var4 /* : Int */;
-long var5 /* : Int */;
-long var7 /* : Int */;
-var_last = p0;
-var_cur = self;
-for(;;) {
-{ /* Inline kernel#Int#<= (var_cur,var_last) */
-/* Covariant cast for argument 0 (i) <var_last:Int> isa OTHER */
-/* <var_last:Int> isa OTHER */
-var2 = 1; /* easy <var_last:Int> isa OTHER*/
-if (!var2) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 256);
-exit(1);
-}
-var3 = var_cur <= var_last;
-var = var3;
-goto RET_LABEL1;
-RET_LABEL1:(void)0;
-}
-if (!var) break;
-printf("NOT YET IMPLEMENTED AClosureCallExpr:lib/standard/kernel.nit:409,4--12\n");
-var4 = 1;
-{ /* Inline kernel#Int#+ (var_cur,var4) */
-var7 = var_cur + var4;
-var5 = var7;
-goto RET_LABEL6;
-RET_LABEL6:(void)0;
-}
-var_cur = var5;
-CONTINUE_label: (void)0;
-}
-BREAK_label: (void)0;
-RET_LABEL:;
-}
-/* method kernel#Int#enumerate_to for (self: Object, Int) */
-void VIRTUAL_kernel__Int__enumerate_to(val* self, long p0) {
-long var /* : Int */;
-var = ((struct instance_kernel__Int*)self)->value; /* autounbox from Object to Int */;
-kernel__Int__enumerate_to(var, p0);
-RET_LABEL:;
-}
-/* method kernel#Int#enumerate_before for (self: Int, Int) */
-void kernel__Int__enumerate_before(long self, long p0) {
-long var_after /* var after: Int */;
-long var_cur /* var cur: Int */;
-short int var /* : Bool */;
-short int var2 /* : Bool */;
-int cltype;
-int idtype;
-short int var3 /* : Bool */;
-long var4 /* : Int */;
-long var5 /* : Int */;
-long var7 /* : Int */;
-var_after = p0;
-var_cur = self;
-for(;;) {
-{ /* Inline kernel#Int#< (var_cur,var_after) */
-/* Covariant cast for argument 0 (i) <var_after:Int> isa OTHER */
-/* <var_after:Int> isa OTHER */
-var2 = 1; /* easy <var_after:Int> isa OTHER*/
-if (!var2) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 257);
-exit(1);
-}
-var3 = var_cur < var_after;
-var = var3;
-goto RET_LABEL1;
-RET_LABEL1:(void)0;
-}
-if (!var) break;
-printf("NOT YET IMPLEMENTED AClosureCallExpr:lib/standard/kernel.nit:420,4--12\n");
-var4 = 1;
-{ /* Inline kernel#Int#+ (var_cur,var4) */
-var7 = var_cur + var4;
-var5 = var7;
-goto RET_LABEL6;
-RET_LABEL6:(void)0;
-}
-var_cur = var5;
-CONTINUE_label: (void)0;
-}
-BREAK_label: (void)0;
-RET_LABEL:;
-}
-/* method kernel#Int#enumerate_before for (self: Object, Int) */
-void VIRTUAL_kernel__Int__enumerate_before(val* self, long p0) {
-long var /* : Int */;
-var = ((struct instance_kernel__Int*)self)->value; /* autounbox from Object to Int */;
-kernel__Int__enumerate_before(var, p0);
-RET_LABEL:;
-}
 /* method kernel#Int#abs for (self: Int): Int */
 long kernel__Int__abs(long self) {
 long var /* : Int */;
@@ -2976,43 +3184,65 @@ short int var2 /* : Bool */;
 short int var4 /* : Bool */;
 int cltype;
 int idtype;
+const char* var_class_name;
 short int var5 /* : Bool */;
 long var6 /* : Int */;
 long var7 /* : Int */;
 long var9 /* : Int */;
 long var10 /* : Int */;
-long var12 /* : Int */;
+short int var12 /* : Bool */;
+int cltype13;
+int idtype14;
+const char* var_class_name15;
+long var16 /* : Int */;
 var1 = 0;
-{ /* Inline kernel#Int#>= (self,var1) */
+{
+{ /* Inline kernel#Int#>= (self,var1) on <self:Int> */
 /* Covariant cast for argument 0 (i) <var1:Int> isa OTHER */
 /* <var1:Int> isa OTHER */
 var4 = 1; /* easy <var1:Int> isa OTHER*/
-if (!var4) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 258);
-exit(1);
+if (unlikely(!var4)) {
+var_class_name = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 372);
+show_backtrace(1);
 }
 var5 = self >= var1;
 var2 = var5;
 goto RET_LABEL3;
 RET_LABEL3:(void)0;
 }
+}
 if (var2){
 var = self;
 goto RET_LABEL;
 } else {
 var6 = 1;
-{ /* Inline kernel#Int#unary - (var6) */
+{
+{ /* Inline kernel#Int#unary - (var6) on <var6:Int> */
 var9 = -var6;
 var7 = var9;
 goto RET_LABEL8;
 RET_LABEL8:(void)0;
 }
-{ /* Inline kernel#Int#* (var7,self) */
-var12 = var7 * self;
-var10 = var12;
+}
+{
+{ /* Inline kernel#Int#* (var7,self) on <var7:Int> */
+/* Covariant cast for argument 0 (i) <self:Int> isa OTHER */
+/* <self:Int> isa OTHER */
+var12 = 1; /* easy <self:Int> isa OTHER*/
+if (unlikely(!var12)) {
+var_class_name15 = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name15);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 378);
+show_backtrace(1);
+}
+var16 = var7 * self;
+var10 = var16;
 goto RET_LABEL11;
 RET_LABEL11:(void)0;
 }
+}
 var = var10;
 goto RET_LABEL;
 }
@@ -3046,7 +3276,7 @@ long var /* : Int */;
 long var1 /* : Int */;
 char var3 /* : Char */;
 long var4 /* : Int */;
-{ /* Inline kernel#Char#object_id (self) */
+{ /* Inline kernel#Char#object_id (self) on <self:Object(Char)> */
 var3 = ((struct instance_kernel__Char*)self)->value; /* autounbox from Object to Char */;
 var4 = (long)var3;
 var1 = var4;
@@ -3062,12 +3292,14 @@ long kernel__Char__hash(char self) {
 long var /* : Int */;
 long var1 /* : Int */;
 long var3 /* : Int */;
-{ /* Inline kernel#Char#ascii (self) */
+{
+{ /* Inline kernel#Char#ascii (self) on <self:Char> */
 var3 = (unsigned char)self;
 var1 = var3;
 goto RET_LABEL2;
 RET_LABEL2:(void)0;
 }
+}
 var = var1;
 goto RET_LABEL;
 RET_LABEL:;
@@ -3104,7 +3336,7 @@ short int VIRTUAL_kernel__Char___61d_61d(val* self, val* p0) {
 short int var /* : Bool */;
 short int var1 /* : Bool */;
 short int var3 /* : Bool */;
-{ /* Inline kernel#Char#== (self,p0) */
+{ /* Inline kernel#Char#== (self,p0) on <self:Object(Char)> */
 var3 = self == p0 || (p0 != NULL && self->class == p0->class && ((struct instance_kernel__Char*)self)->value == ((struct instance_kernel__Char*)p0)->value);
 var1 = var3;
 goto RET_LABEL2;
@@ -3137,7 +3369,7 @@ short int var /* : Bool */;
 short int var1 /* : Bool */;
 short int var3 /* : Bool */;
 short int var4 /* : Bool */;
-{ /* Inline kernel#Char#!= (self,p0) */
+{ /* Inline kernel#Char#!= (self,p0) on <self:Object(Char)> */
 var3 = self == p0 || (p0 != NULL && self->class == p0->class && ((struct instance_kernel__Char*)self)->value == ((struct instance_kernel__Char*)p0)->value);
 var4 = !var3;
 var1 = var4;
@@ -3148,34 +3380,22 @@ var = var1;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Char#output for (self: Char) */
-void kernel__Char__output(char self) {
-printf("%c", self);
-RET_LABEL:;
-}
-/* method kernel#Char#output for (self: Object) */
-void VIRTUAL_kernel__Char__output(val* self) {
-char var /* : Char */;
-{ /* Inline kernel#Char#output (self) */
-var = ((struct instance_kernel__Char*)self)->value; /* autounbox from Object to Char */;
-printf("%c", var);
-RET_LABEL1:(void)0;
-}
-RET_LABEL:;
-}
 /* method kernel#Char#<= for (self: Char, Char): Bool */
 short int kernel__Char___60d_61d(char self, char p0) {
 short int var /* : Bool */;
 short int var1 /* : Bool */;
 int cltype;
 int idtype;
+const char* var_class_name;
 short int var2 /* : Bool */;
 /* Covariant cast for argument 0 (i) <p0:Char> isa OTHER */
 /* <p0:Char> isa OTHER */
 var1 = 1; /* easy <p0:Char> isa OTHER*/
-if (!var1) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 454);
-exit(1);
+if (unlikely(!var1)) {
+var_class_name = type_kernel__Char.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 545);
+show_backtrace(1);
 }
 var2 = self <= p0;
 var = var2;
@@ -3191,10 +3411,11 @@ short int var3 /* : Bool */;
 int cltype;
 int idtype;
 const struct type* type_struct;
+const char* var_class_name;
 char var4 /* : Char */;
 char var5 /* : Char */;
 short int var6 /* : Bool */;
-{ /* Inline kernel#Char#<= (self,p0) */
+{ /* Inline kernel#Char#<= (self,p0) on <self:Object(Char)> */
 /* Covariant cast for argument 0 (i) <p0:Comparable> isa OTHER */
 /* <p0:Comparable> isa OTHER */
 type_struct = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
@@ -3205,9 +3426,11 @@ var3 = 0;
 } else {
 var3 = p0->type->type_table[cltype] == idtype;
 }
-if (!var3) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 454);
-exit(1);
+if (unlikely(!var3)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 545);
+show_backtrace(1);
 }
 var4 = ((struct instance_kernel__Char*)self)->value; /* autounbox from Object to Char */;
 var5 = ((struct instance_kernel__Char*)p0)->value; /* autounbox from Comparable to Char */;
@@ -3226,13 +3449,16 @@ short int var /* : Bool */;
 short int var1 /* : Bool */;
 int cltype;
 int idtype;
+const char* var_class_name;
 short int var2 /* : Bool */;
 /* Covariant cast for argument 0 (i) <p0:Char> isa OTHER */
 /* <p0:Char> isa OTHER */
 var1 = 1; /* easy <p0:Char> isa OTHER*/
-if (!var1) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 455);
-exit(1);
+if (unlikely(!var1)) {
+var_class_name = type_kernel__Char.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 546);
+show_backtrace(1);
 }
 var2 = self < p0;
 var = var2;
@@ -3248,10 +3474,11 @@ short int var3 /* : Bool */;
 int cltype;
 int idtype;
 const struct type* type_struct;
+const char* var_class_name;
 char var4 /* : Char */;
 char var5 /* : Char */;
 short int var6 /* : Bool */;
-{ /* Inline kernel#Char#< (self,p0) */
+{ /* Inline kernel#Char#< (self,p0) on <self:Object(Char)> */
 /* Covariant cast for argument 0 (i) <p0:Comparable> isa OTHER */
 /* <p0:Comparable> isa OTHER */
 type_struct = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
@@ -3262,9 +3489,11 @@ var3 = 0;
 } else {
 var3 = p0->type->type_table[cltype] == idtype;
 }
-if (!var3) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 455);
-exit(1);
+if (unlikely(!var3)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 546);
+show_backtrace(1);
 }
 var4 = ((struct instance_kernel__Char*)self)->value; /* autounbox from Object to Char */;
 var5 = ((struct instance_kernel__Char*)p0)->value; /* autounbox from Comparable to Char */;
@@ -3283,13 +3512,16 @@ short int var /* : Bool */;
 short int var1 /* : Bool */;
 int cltype;
 int idtype;
+const char* var_class_name;
 short int var2 /* : Bool */;
 /* Covariant cast for argument 0 (i) <p0:Char> isa OTHER */
 /* <p0:Char> isa OTHER */
 var1 = 1; /* easy <p0:Char> isa OTHER*/
-if (!var1) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 456);
-exit(1);
+if (unlikely(!var1)) {
+var_class_name = type_kernel__Char.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 547);
+show_backtrace(1);
 }
 var2 = self >= p0;
 var = var2;
@@ -3305,10 +3537,11 @@ short int var3 /* : Bool */;
 int cltype;
 int idtype;
 const struct type* type_struct;
+const char* var_class_name;
 char var4 /* : Char */;
 char var5 /* : Char */;
 short int var6 /* : Bool */;
-{ /* Inline kernel#Char#>= (self,p0) */
+{ /* Inline kernel#Char#>= (self,p0) on <self:Object(Char)> */
 /* Covariant cast for argument 0 (i) <p0:Comparable> isa OTHER */
 /* <p0:Comparable> isa OTHER */
 type_struct = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
@@ -3319,9 +3552,11 @@ var3 = 0;
 } else {
 var3 = p0->type->type_table[cltype] == idtype;
 }
-if (!var3) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 456);
-exit(1);
+if (unlikely(!var3)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 547);
+show_backtrace(1);
 }
 var4 = ((struct instance_kernel__Char*)self)->value; /* autounbox from Object to Char */;
 var5 = ((struct instance_kernel__Char*)p0)->value; /* autounbox from Comparable to Char */;
@@ -3340,13 +3575,16 @@ short int var /* : Bool */;
 short int var1 /* : Bool */;
 int cltype;
 int idtype;
+const char* var_class_name;
 short int var2 /* : Bool */;
 /* Covariant cast for argument 0 (i) <p0:Char> isa OTHER */
 /* <p0:Char> isa OTHER */
 var1 = 1; /* easy <p0:Char> isa OTHER*/
-if (!var1) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 457);
-exit(1);
+if (unlikely(!var1)) {
+var_class_name = type_kernel__Char.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 548);
+show_backtrace(1);
 }
 var2 = self > p0;
 var = var2;
@@ -3362,10 +3600,11 @@ short int var3 /* : Bool */;
 int cltype;
 int idtype;
 const struct type* type_struct;
+const char* var_class_name;
 char var4 /* : Char */;
 char var5 /* : Char */;
 short int var6 /* : Bool */;
-{ /* Inline kernel#Char#> (self,p0) */
+{ /* Inline kernel#Char#> (self,p0) on <self:Object(Char)> */
 /* Covariant cast for argument 0 (i) <p0:Comparable> isa OTHER */
 /* <p0:Comparable> isa OTHER */
 type_struct = self->type->resolution_table->types[COLOR_kernel__Comparable_VTOTHER];
@@ -3376,70 +3615,43 @@ var3 = 0;
 } else {
 var3 = p0->type->type_table[cltype] == idtype;
 }
-if (!var3) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 457);
-exit(1);
-}
-var4 = ((struct instance_kernel__Char*)self)->value; /* autounbox from Object to Char */;
-var5 = ((struct instance_kernel__Char*)p0)->value; /* autounbox from Comparable to Char */;
-var6 = var4 > var5;
-var1 = var6;
-goto RET_LABEL2;
-RET_LABEL2:(void)0;
-}
-var = var1;
-RET_LABEL:;
-return var;
-}
-/* method kernel#Char#succ for (self: Char): Char */
-char kernel__Char__succ(char self) {
-char var /* : Char */;
-char var1 /* : Char */;
-var1 = self+1;
-var = var1;
-goto RET_LABEL;
-RET_LABEL:;
-return var;
-}
-/* method kernel#Char#succ for (self: Object): Discrete */
-val* VIRTUAL_kernel__Char__succ(val* self) {
-val* var /* : Discrete */;
-char var1 /* : Char */;
-char var3 /* : Char */;
-char var4 /* : Char */;
-val* var5 /* : Discrete */;
-{ /* Inline kernel#Char#succ (self) */
-var3 = ((struct instance_kernel__Char*)self)->value; /* autounbox from Object to Char */;
-var4 = var3+1;
-var1 = var4;
+if (unlikely(!var3)) {
+var_class_name = p0 == NULL ? "null" : p0->type->name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 548);
+show_backtrace(1);
+}
+var4 = ((struct instance_kernel__Char*)self)->value; /* autounbox from Object to Char */;
+var5 = ((struct instance_kernel__Char*)p0)->value; /* autounbox from Comparable to Char */;
+var6 = var4 > var5;
+var1 = var6;
 goto RET_LABEL2;
 RET_LABEL2:(void)0;
 }
-var5 = BOX_kernel__Char(var1); /* autobox from Char to Discrete */
-var = var5;
+var = var1;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Char#prec for (self: Char): Char */
-char kernel__Char__prec(char self) {
+/* method kernel#Char#successor for (self: Char, Int): Char */
+char kernel__Char__successor(char self, long p0) {
 char var /* : Char */;
 char var1 /* : Char */;
-var1 = self-1;
+var1 = self + p0;
 var = var1;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Char#prec for (self: Object): Discrete */
-val* VIRTUAL_kernel__Char__prec(val* self) {
+/* method kernel#Char#successor for (self: Object, Int): Discrete */
+val* VIRTUAL_kernel__Char__successor(val* self, long p0) {
 val* var /* : Discrete */;
 char var1 /* : Char */;
 char var3 /* : Char */;
 char var4 /* : Char */;
 val* var5 /* : Discrete */;
-{ /* Inline kernel#Char#prec (self) */
+{ /* Inline kernel#Char#successor (self,p0) on <self:Object(Char)> */
 var3 = ((struct instance_kernel__Char*)self)->value; /* autounbox from Object to Char */;
-var4 = var3-1;
+var4 = var3 + p0;
 var1 = var4;
 goto RET_LABEL2;
 RET_LABEL2:(void)0;
@@ -3455,74 +3667,103 @@ long var /* : Int */;
 short int var1 /* : Bool */;
 int cltype;
 int idtype;
+const char* var_class_name;
 char var_c /* var c: Char */;
 long var2 /* : Int */;
 long var4 /* : Int */;
 long var5 /* : Int */;
 long var7 /* : Int */;
 long var8 /* : Int */;
-long var10 /* : Int */;
+short int var10 /* : Bool */;
+int cltype11;
+int idtype12;
+const char* var_class_name13;
+long var14 /* : Int */;
 long var_d /* var d: Int */;
-long var11 /* : Int */;
-short int var12 /* : Bool */;
-short int var14 /* : Bool */;
-int cltype15;
-int idtype16;
-short int var17 /* : Bool */;
-long var18 /* : Int */;
-long var20 /* : Int */;
+long var15 /* : Int */;
+short int var16 /* : Bool */;
+short int var18 /* : Bool */;
+int cltype19;
+int idtype20;
+const char* var_class_name21;
+short int var22 /* : Bool */;
+long var23 /* : Int */;
+long var25 /* : Int */;
 /* Covariant cast for argument 0 (c) <p0:Char> isa OTHER */
 /* <p0:Char> isa OTHER */
 var1 = 1; /* easy <p0:Char> isa OTHER*/
-if (!var1) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 462);
-exit(1);
+if (unlikely(!var1)) {
+var_class_name = type_kernel__Char.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 553);
+show_backtrace(1);
 }
 var_c = p0;
-{ /* Inline kernel#Char#ascii (self) */
+{
+{ /* Inline kernel#Char#ascii (self) on <self:Char> */
 var4 = (unsigned char)self;
 var2 = var4;
 goto RET_LABEL3;
 RET_LABEL3:(void)0;
 }
-{ /* Inline kernel#Char#ascii (var_c) */
+}
+{
+{ /* Inline kernel#Char#ascii (var_c) on <var_c:Char> */
 var7 = (unsigned char)var_c;
 var5 = var7;
 goto RET_LABEL6;
 RET_LABEL6:(void)0;
 }
-{ /* Inline kernel#Int#- (var2,var5) */
-var10 = var2 - var5;
-var8 = var10;
+}
+{
+{ /* Inline kernel#Int#- (var2,var5) on <var2:Int> */
+/* Covariant cast for argument 0 (i) <var5:Int> isa OTHER */
+/* <var5:Int> isa OTHER */
+var10 = 1; /* easy <var5:Int> isa OTHER*/
+if (unlikely(!var10)) {
+var_class_name13 = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name13);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 377);
+show_backtrace(1);
+}
+var14 = var2 - var5;
+var8 = var14;
 goto RET_LABEL9;
 RET_LABEL9:(void)0;
 }
+}
 var_d = var8;
-var11 = 0;
-{ /* Inline kernel#Int#>= (var_d,var11) */
-/* Covariant cast for argument 0 (i) <var11:Int> isa OTHER */
-/* <var11:Int> isa OTHER */
-var14 = 1; /* easy <var11:Int> isa OTHER*/
-if (!var14) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 258);
-exit(1);
+var15 = 0;
+{
+{ /* Inline kernel#Int#>= (var_d,var15) on <var_d:Int> */
+/* Covariant cast for argument 0 (i) <var15:Int> isa OTHER */
+/* <var15:Int> isa OTHER */
+var18 = 1; /* easy <var15:Int> isa OTHER*/
+if (unlikely(!var18)) {
+var_class_name21 = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name21);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 372);
+show_backtrace(1);
+}
+var22 = var_d >= var15;
+var16 = var22;
+goto RET_LABEL17;
+RET_LABEL17:(void)0;
 }
-var17 = var_d >= var11;
-var12 = var17;
-goto RET_LABEL13;
-RET_LABEL13:(void)0;
 }
-if (var12){
+if (var16){
 var = var_d;
 goto RET_LABEL;
 } else {
-{ /* Inline kernel#Int#unary - (var_d) */
-var20 = -var_d;
-var18 = var20;
-goto RET_LABEL19;
-RET_LABEL19:(void)0;
+{
+{ /* Inline kernel#Int#unary - (var_d) on <var_d:Int> */
+var25 = -var_d;
+var23 = var25;
+goto RET_LABEL24;
+RET_LABEL24:(void)0;
 }
-var = var18;
+}
+var = var23;
 goto RET_LABEL;
 }
 RET_LABEL:;
@@ -3546,99 +3787,162 @@ long kernel__Char__to_i(char self) {
 long var /* : Int */;
 char var1 /* : Char */;
 short int var2 /* : Bool */;
-short int var4 /* : Bool */;
-long var5 /* : Int */;
+short int var3 /* : Bool */;
+short int var5 /* : Bool */;
 long var6 /* : Int */;
-long var8 /* : Int */;
-short int var9 /* : Bool */;
-long var10 /* : Int */;
-long var12 /* : Int */;
-char var13 /* : Char */;
-long var14 /* : Int */;
-long var16 /* : Int */;
+long var7 /* : Int */;
+long var9 /* : Int */;
+short int var10 /* : Bool */;
+long var11 /* : Int */;
+long var13 /* : Int */;
+char var14 /* : Char */;
+long var15 /* : Int */;
 long var17 /* : Int */;
-long var19 /* : Int */;
-char var20 /* : Char */;
+long var18 /* : Int */;
+short int var20 /* : Bool */;
+int cltype;
+int idtype;
+const char* var_class_name;
 long var21 /* : Int */;
+char var22 /* : Char */;
 long var23 /* : Int */;
-char var24 /* : Char */;
 long var25 /* : Int */;
+char var26 /* : Char */;
 long var27 /* : Int */;
-long var28 /* : Int */;
 long var29 /* : Int */;
-long var31 /* : Int */;
-long var32 /* : Int */;
-long var34 /* : Int */;
+long var30 /* : Int */;
+short int var32 /* : Bool */;
+int cltype33;
+int idtype34;
+const char* var_class_name35;
+long var36 /* : Int */;
+long var37 /* : Int */;
+long var38 /* : Int */;
+short int var40 /* : Bool */;
+int cltype41;
+int idtype42;
+const char* var_class_name43;
+long var44 /* : Int */;
 var1 = '-';
-{ /* Inline kernel#Char#== (self,var1) */
-var4 = self == var1;
-var2 = var4;
-goto RET_LABEL3;
-RET_LABEL3:(void)0;
+{
+{ /* Inline kernel#Char#== (self,var1) on <self:Char> */
+var5 = self == var1;
+var3 = var5;
+goto RET_LABEL4;
+RET_LABEL4:(void)0;
+}
+var2 = var3;
 }
 if (var2){
-var5 = 1;
-{ /* Inline kernel#Int#unary - (var5) */
-var8 = -var5;
-var6 = var8;
-goto RET_LABEL7;
-RET_LABEL7:(void)0;
+var6 = 1;
+{
+{ /* Inline kernel#Int#unary - (var6) on <var6:Int> */
+var9 = -var6;
+var7 = var9;
+goto RET_LABEL8;
+RET_LABEL8:(void)0;
 }
-var = var6;
+}
+var = var7;
 goto RET_LABEL;
 } else {
-var9 = kernel__Char__is_digit(self);
-if (var9){
-{ /* Inline kernel#Char#ascii (self) */
-var12 = (unsigned char)self;
-var10 = var12;
-goto RET_LABEL11;
-RET_LABEL11:(void)0;
+{
+var10 = kernel__Char__is_digit(self);
 }
-var13 = '0';
-{ /* Inline kernel#Char#ascii (var13) */
-var16 = (unsigned char)var13;
-var14 = var16;
-goto RET_LABEL15;
-RET_LABEL15:(void)0;
+if (var10){
+{
+{ /* Inline kernel#Char#ascii (self) on <self:Char> */
+var13 = (unsigned char)self;
+var11 = var13;
+goto RET_LABEL12;
+RET_LABEL12:(void)0;
 }
-{ /* Inline kernel#Int#- (var10,var14) */
-var19 = var10 - var14;
-var17 = var19;
-goto RET_LABEL18;
-RET_LABEL18:(void)0;
 }
-var = var17;
+var14 = '0';
+{
+{ /* Inline kernel#Char#ascii (var14) on <var14:Char> */
+var17 = (unsigned char)var14;
+var15 = var17;
+goto RET_LABEL16;
+RET_LABEL16:(void)0;
+}
+}
+{
+{ /* Inline kernel#Int#- (var11,var15) on <var11:Int> */
+/* Covariant cast for argument 0 (i) <var15:Int> isa OTHER */
+/* <var15:Int> isa OTHER */
+var20 = 1; /* easy <var15:Int> isa OTHER*/
+if (unlikely(!var20)) {
+var_class_name = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 377);
+show_backtrace(1);
+}
+var21 = var11 - var15;
+var18 = var21;
+goto RET_LABEL19;
+RET_LABEL19:(void)0;
+}
+}
+var = var18;
 goto RET_LABEL;
 } else {
-var20 = kernel__Char__to_lower(self);
-{ /* Inline kernel#Char#ascii (var20) */
-var23 = (unsigned char)var20;
-var21 = var23;
-goto RET_LABEL22;
-RET_LABEL22:(void)0;
-}
-var24 = 'a';
-{ /* Inline kernel#Char#ascii (var24) */
-var27 = (unsigned char)var24;
-var25 = var27;
-goto RET_LABEL26;
-RET_LABEL26:(void)0;
-}
-var28 = 10;
-{ /* Inline kernel#Int#+ (var25,var28) */
-var31 = var25 + var28;
-var29 = var31;
-goto RET_LABEL30;
-RET_LABEL30:(void)0;
-}
-{ /* Inline kernel#Int#- (var21,var29) */
-var34 = var21 - var29;
-var32 = var34;
-goto RET_LABEL33;
-RET_LABEL33:(void)0;
+{
+var22 = kernel__Char__to_lower(self);
+}
+{
+{ /* Inline kernel#Char#ascii (var22) on <var22:Char> */
+var25 = (unsigned char)var22;
+var23 = var25;
+goto RET_LABEL24;
+RET_LABEL24:(void)0;
+}
+}
+var26 = 'a';
+{
+{ /* Inline kernel#Char#ascii (var26) on <var26:Char> */
+var29 = (unsigned char)var26;
+var27 = var29;
+goto RET_LABEL28;
+RET_LABEL28:(void)0;
+}
+}
+{
+{ /* Inline kernel#Int#- (var23,var27) on <var23:Int> */
+/* Covariant cast for argument 0 (i) <var27:Int> isa OTHER */
+/* <var27:Int> isa OTHER */
+var32 = 1; /* easy <var27:Int> isa OTHER*/
+if (unlikely(!var32)) {
+var_class_name35 = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name35);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 377);
+show_backtrace(1);
+}
+var36 = var23 - var27;
+var30 = var36;
+goto RET_LABEL31;
+RET_LABEL31:(void)0;
+}
 }
-var = var32;
+var37 = 10;
+{
+{ /* Inline kernel#Int#+ (var30,var37) on <var30:Int> */
+/* Covariant cast for argument 0 (i) <var37:Int> isa OTHER */
+/* <var37:Int> isa OTHER */
+var40 = 1; /* easy <var37:Int> isa OTHER*/
+if (unlikely(!var40)) {
+var_class_name43 = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name43);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 374);
+show_backtrace(1);
+}
+var44 = var30 + var37;
+var38 = var44;
+goto RET_LABEL39;
+RET_LABEL39:(void)0;
+}
+}
+var = var38;
 goto RET_LABEL;
 }
 }
@@ -3672,7 +3976,7 @@ long var /* : Int */;
 long var1 /* : Int */;
 char var3 /* : Char */;
 long var4 /* : Int */;
-{ /* Inline kernel#Char#ascii (self) */
+{ /* Inline kernel#Char#ascii (self) on <self:Object(Char)> */
 var3 = ((struct instance_kernel__Char*)self)->value; /* autounbox from Object to Char */;
 var4 = (unsigned char)var3;
 var1 = var4;
@@ -3683,64 +3987,6 @@ var = var1;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Char#+ for (self: Char, Int): Char */
-char kernel__Char___43d(char self, long p0) {
-char var /* : Char */;
-char var1 /* : Char */;
-var1 = self + p0;
-var = var1;
-goto RET_LABEL;
-RET_LABEL:;
-return var;
-}
-/* method kernel#Char#+ for (self: Object, Int): Discrete */
-val* VIRTUAL_kernel__Char___43d(val* self, long p0) {
-val* var /* : Discrete */;
-char var1 /* : Char */;
-char var3 /* : Char */;
-char var4 /* : Char */;
-val* var5 /* : Discrete */;
-{ /* Inline kernel#Char#+ (self,p0) */
-var3 = ((struct instance_kernel__Char*)self)->value; /* autounbox from Object to Char */;
-var4 = var3 + p0;
-var1 = var4;
-goto RET_LABEL2;
-RET_LABEL2:(void)0;
-}
-var5 = BOX_kernel__Char(var1); /* autobox from Char to Discrete */
-var = var5;
-RET_LABEL:;
-return var;
-}
-/* method kernel#Char#- for (self: Char, Int): Char */
-char kernel__Char___45d(char self, long p0) {
-char var /* : Char */;
-char var1 /* : Char */;
-var1 = self - p0;
-var = var1;
-goto RET_LABEL;
-RET_LABEL:;
-return var;
-}
-/* method kernel#Char#- for (self: Object, Int): Discrete */
-val* VIRTUAL_kernel__Char___45d(val* self, long p0) {
-val* var /* : Discrete */;
-char var1 /* : Char */;
-char var3 /* : Char */;
-char var4 /* : Char */;
-val* var5 /* : Discrete */;
-{ /* Inline kernel#Char#- (self,p0) */
-var3 = ((struct instance_kernel__Char*)self)->value; /* autounbox from Object to Char */;
-var4 = var3 - p0;
-var1 = var4;
-goto RET_LABEL2;
-RET_LABEL2:(void)0;
-}
-var5 = BOX_kernel__Char(var1); /* autobox from Char to Discrete */
-var = var5;
-RET_LABEL:;
-return var;
-}
 /* method kernel#Char#to_lower for (self: Char): Char */
 char kernel__Char__to_lower(char self) {
 char var /* : Char */;
@@ -3751,33 +3997,56 @@ char var5 /* : Char */;
 char var6 /* : Char */;
 long var7 /* : Int */;
 long var8 /* : Int */;
-long var10 /* : Int */;
-char var11 /* : Char */;
-char var13 /* : Char */;
+short int var10 /* : Bool */;
+int cltype;
+int idtype;
+const char* var_class_name;
+long var11 /* : Int */;
+char var12 /* : Char */;
+char var14 /* : Char */;
+{
 var1 = kernel__Char__is_upper(self);
+}
 if (var1){
-{ /* Inline kernel#Char#ascii (self) */
+{
+{ /* Inline kernel#Char#ascii (self) on <self:Char> */
 var4 = (unsigned char)self;
 var2 = var4;
 goto RET_LABEL3;
 RET_LABEL3:(void)0;
 }
+}
 var5 = 'a';
 var6 = 'A';
+{
 var7 = kernel__Char__distance(var5, var6);
-{ /* Inline kernel#Int#+ (var2,var7) */
-var10 = var2 + var7;
-var8 = var10;
+}
+{
+{ /* Inline kernel#Int#+ (var2,var7) on <var2:Int> */
+/* Covariant cast for argument 0 (i) <var7:Int> isa OTHER */
+/* <var7:Int> isa OTHER */
+var10 = 1; /* easy <var7:Int> isa OTHER*/
+if (unlikely(!var10)) {
+var_class_name = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 374);
+show_backtrace(1);
+}
+var11 = var2 + var7;
+var8 = var11;
 goto RET_LABEL9;
 RET_LABEL9:(void)0;
 }
-{ /* Inline kernel#Int#ascii (var8) */
-var13 = var8;
-var11 = var13;
-goto RET_LABEL12;
-RET_LABEL12:(void)0;
 }
-var = var11;
+{
+{ /* Inline kernel#Int#ascii (var8) on <var8:Int> */
+var14 = var8;
+var12 = var14;
+goto RET_LABEL13;
+RET_LABEL13:(void)0;
+}
+}
+var = var12;
 goto RET_LABEL;
 } else {
 var = self;
@@ -3807,33 +4076,56 @@ char var5 /* : Char */;
 char var6 /* : Char */;
 long var7 /* : Int */;
 long var8 /* : Int */;
-long var10 /* : Int */;
-char var11 /* : Char */;
-char var13 /* : Char */;
+short int var10 /* : Bool */;
+int cltype;
+int idtype;
+const char* var_class_name;
+long var11 /* : Int */;
+char var12 /* : Char */;
+char var14 /* : Char */;
+{
 var1 = kernel__Char__is_lower(self);
+}
 if (var1){
-{ /* Inline kernel#Char#ascii (self) */
+{
+{ /* Inline kernel#Char#ascii (self) on <self:Char> */
 var4 = (unsigned char)self;
 var2 = var4;
 goto RET_LABEL3;
 RET_LABEL3:(void)0;
 }
+}
 var5 = 'a';
 var6 = 'A';
+{
 var7 = kernel__Char__distance(var5, var6);
-{ /* Inline kernel#Int#- (var2,var7) */
-var10 = var2 - var7;
-var8 = var10;
+}
+{
+{ /* Inline kernel#Int#- (var2,var7) on <var2:Int> */
+/* Covariant cast for argument 0 (i) <var7:Int> isa OTHER */
+/* <var7:Int> isa OTHER */
+var10 = 1; /* easy <var7:Int> isa OTHER*/
+if (unlikely(!var10)) {
+var_class_name = type_kernel__Int.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 377);
+show_backtrace(1);
+}
+var11 = var2 - var7;
+var8 = var11;
 goto RET_LABEL9;
 RET_LABEL9:(void)0;
 }
-{ /* Inline kernel#Int#ascii (var8) */
-var13 = var8;
-var11 = var13;
-goto RET_LABEL12;
-RET_LABEL12:(void)0;
 }
-var = var11;
+{
+{ /* Inline kernel#Int#ascii (var8) on <var8:Int> */
+var14 = var8;
+var12 = var14;
+goto RET_LABEL13;
+RET_LABEL13:(void)0;
+}
+}
+var = var12;
 goto RET_LABEL;
 } else {
 var = self;
@@ -3862,6 +4154,7 @@ short int var3 /* : Bool */;
 short int var5 /* : Bool */;
 int cltype;
 int idtype;
+const char* var_class_name;
 short int var6 /* : Bool */;
 short int var_ /* var : Bool */;
 char var7 /* : Char */;
@@ -3869,37 +4162,46 @@ short int var8 /* : Bool */;
 short int var10 /* : Bool */;
 int cltype11;
 int idtype12;
-short int var13 /* : Bool */;
+const char* var_class_name13;
+short int var14 /* : Bool */;
 var2 = '0';
-{ /* Inline kernel#Char#>= (self,var2) */
+{
+{ /* Inline kernel#Char#>= (self,var2) on <self:Char> */
 /* Covariant cast for argument 0 (i) <var2:Char> isa OTHER */
 /* <var2:Char> isa OTHER */
 var5 = 1; /* easy <var2:Char> isa OTHER*/
-if (!var5) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 456);
-exit(1);
+if (unlikely(!var5)) {
+var_class_name = type_kernel__Char.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 547);
+show_backtrace(1);
 }
 var6 = self >= var2;
 var3 = var6;
 goto RET_LABEL4;
 RET_LABEL4:(void)0;
 }
+}
 var_ = var3;
 if (var3){
 var7 = '9';
-{ /* Inline kernel#Char#<= (self,var7) */
+{
+{ /* Inline kernel#Char#<= (self,var7) on <self:Char> */
 /* Covariant cast for argument 0 (i) <var7:Char> isa OTHER */
 /* <var7:Char> isa OTHER */
 var10 = 1; /* easy <var7:Char> isa OTHER*/
-if (!var10) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 454);
-exit(1);
-}
-var13 = self <= var7;
-var8 = var13;
+if (unlikely(!var10)) {
+var_class_name13 = type_kernel__Char.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name13);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 545);
+show_backtrace(1);
+}
+var14 = self <= var7;
+var8 = var14;
 goto RET_LABEL9;
 RET_LABEL9:(void)0;
 }
+}
 var1 = var8;
 } else {
 var1 = var_;
@@ -3929,6 +4231,7 @@ short int var3 /* : Bool */;
 short int var5 /* : Bool */;
 int cltype;
 int idtype;
+const char* var_class_name;
 short int var6 /* : Bool */;
 short int var_ /* var : Bool */;
 char var7 /* : Char */;
@@ -3936,37 +4239,46 @@ short int var8 /* : Bool */;
 short int var10 /* : Bool */;
 int cltype11;
 int idtype12;
-short int var13 /* : Bool */;
+const char* var_class_name13;
+short int var14 /* : Bool */;
 var2 = 'a';
-{ /* Inline kernel#Char#>= (self,var2) */
+{
+{ /* Inline kernel#Char#>= (self,var2) on <self:Char> */
 /* Covariant cast for argument 0 (i) <var2:Char> isa OTHER */
 /* <var2:Char> isa OTHER */
 var5 = 1; /* easy <var2:Char> isa OTHER*/
-if (!var5) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 456);
-exit(1);
+if (unlikely(!var5)) {
+var_class_name = type_kernel__Char.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 547);
+show_backtrace(1);
 }
 var6 = self >= var2;
 var3 = var6;
 goto RET_LABEL4;
 RET_LABEL4:(void)0;
 }
+}
 var_ = var3;
 if (var3){
 var7 = 'z';
-{ /* Inline kernel#Char#<= (self,var7) */
+{
+{ /* Inline kernel#Char#<= (self,var7) on <self:Char> */
 /* Covariant cast for argument 0 (i) <var7:Char> isa OTHER */
 /* <var7:Char> isa OTHER */
 var10 = 1; /* easy <var7:Char> isa OTHER*/
-if (!var10) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 454);
-exit(1);
-}
-var13 = self <= var7;
-var8 = var13;
+if (unlikely(!var10)) {
+var_class_name13 = type_kernel__Char.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name13);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 545);
+show_backtrace(1);
+}
+var14 = self <= var7;
+var8 = var14;
 goto RET_LABEL9;
 RET_LABEL9:(void)0;
 }
+}
 var1 = var8;
 } else {
 var1 = var_;
@@ -3996,6 +4308,7 @@ short int var3 /* : Bool */;
 short int var5 /* : Bool */;
 int cltype;
 int idtype;
+const char* var_class_name;
 short int var6 /* : Bool */;
 short int var_ /* var : Bool */;
 char var7 /* : Char */;
@@ -4003,37 +4316,46 @@ short int var8 /* : Bool */;
 short int var10 /* : Bool */;
 int cltype11;
 int idtype12;
-short int var13 /* : Bool */;
+const char* var_class_name13;
+short int var14 /* : Bool */;
 var2 = 'A';
-{ /* Inline kernel#Char#>= (self,var2) */
+{
+{ /* Inline kernel#Char#>= (self,var2) on <self:Char> */
 /* Covariant cast for argument 0 (i) <var2:Char> isa OTHER */
 /* <var2:Char> isa OTHER */
 var5 = 1; /* easy <var2:Char> isa OTHER*/
-if (!var5) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 456);
-exit(1);
+if (unlikely(!var5)) {
+var_class_name = type_kernel__Char.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 547);
+show_backtrace(1);
 }
 var6 = self >= var2;
 var3 = var6;
 goto RET_LABEL4;
 RET_LABEL4:(void)0;
 }
+}
 var_ = var3;
 if (var3){
 var7 = 'Z';
-{ /* Inline kernel#Char#<= (self,var7) */
+{
+{ /* Inline kernel#Char#<= (self,var7) on <self:Char> */
 /* Covariant cast for argument 0 (i) <var7:Char> isa OTHER */
 /* <var7:Char> isa OTHER */
 var10 = 1; /* easy <var7:Char> isa OTHER*/
-if (!var10) {
-fprintf(stderr, "Runtime error: %s (%s:%d)\n", "Cast failed", "lib/standard/kernel.nit", 454);
-exit(1);
-}
-var13 = self <= var7;
-var8 = var13;
+if (unlikely(!var10)) {
+var_class_name13 = type_kernel__Char.name;
+PRINT_ERROR("Runtime error: Cast failed. Expected `%s`, got `%s`", "OTHER", var_class_name13);
+PRINT_ERROR(" (%s:%d)\n", "../lib/standard/kernel.nit", 545);
+show_backtrace(1);
+}
+var14 = self <= var7;
+var8 = var14;
 goto RET_LABEL9;
 RET_LABEL9:(void)0;
 }
+}
 var1 = var8;
 } else {
 var1 = var_;
@@ -4054,52 +4376,31 @@ var = var1;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Char#is_letter for (self: Char): Bool */
-short int kernel__Char__is_letter(char self) {
+/* method kernel#Pointer#address_is_null for (self: Pointer): Bool */
+short int kernel__Pointer__address_is_null(val* self) {
 short int var /* : Bool */;
-short int var1 /* : Bool */;
-short int var2 /* : Bool */;
-short int var_ /* var : Bool */;
-short int var3 /* : Bool */;
-var2 = kernel__Char__is_lower(self);
-var_ = var2;
-if (var2){
-var1 = var_;
-} else {
-var3 = kernel__Char__is_upper(self);
-var1 = var3;
-}
+short int var1 /* : Bool for extern */;
+void* var2 /* : Pointer for extern */;
+var2 = ((struct instance_kernel__Pointer*)self)->value; /* unboxing Pointer */
+var1 = address_is_null(var2);
 var = var1;
 goto RET_LABEL;
 RET_LABEL:;
 return var;
 }
-/* method kernel#Char#is_letter for (self: Object): Bool */
-short int VIRTUAL_kernel__Char__is_letter(val* self) {
-short int var /* : Bool */;
-short int var1 /* : Bool */;
-char var2 /* : Char */;
-var2 = ((struct instance_kernel__Char*)self)->value; /* autounbox from Object to Char */;
-var1 = kernel__Char__is_letter(var2);
-var = var1;
-RET_LABEL:;
-return var;
-}
-/* method kernel#Pointer#address_is_null for (self: Pointer): Bool */
-short int kernel__Pointer__address_is_null(void* self) {
-short int var /* : Bool */;
-fprintf(stderr, "NOT YET IMPLEMENTED nitni for kernel#Pointer#address_is_null at lib/standard/kernel.nit:572,2--573,53\n");
-exit(1);
-RET_LABEL:;
-return var;
-}
 /* method kernel#Pointer#address_is_null for (self: Object): Bool */
 short int VIRTUAL_kernel__Pointer__address_is_null(val* self) {
 short int var /* : Bool */;
 short int var1 /* : Bool */;
-void* var2 /* : Pointer */;
-var2 = ((struct instance_kernel__Pointer*)self)->value; /* autounbox from Object to Pointer */;
-var1 = kernel__Pointer__address_is_null(var2);
+short int var3 /* : Bool for extern */;
+void* var4 /* : Pointer for extern */;
+{ /* Inline kernel#Pointer#address_is_null (self) on <self:Object(Pointer)> */
+var4 = ((struct instance_kernel__Pointer*)self)->value; /* unboxing Object */
+var3 = address_is_null(var4);
+var1 = var3;
+goto RET_LABEL2;
+RET_LABEL2:(void)0;
+}
 var = var1;
 RET_LABEL:;
 return var;