Fixed register windows of OP_SENDs generated by NODE_{FOR,SYMBOLS}; ref
MODIFY
mrbgems/mruby-compiler/core/codegen.c
mrbgems/mruby-compiler/core/codegen.c
@@ -631,6 +631,7 @@ for_body(codegen_scope *s, node *tree)
scope_finish(s);
s = prev;
genop(s, MKOP_Abc(OP_LAMBDA, cursp(), s->irep->rlen-1, OP_L_BLOCK));
+ push();pop(); /* space for a block */
pop();
idx = new_msym(s, mrb_intern_lit(s->mrb, "each"));
genop(s, MKOP_ABC(OP_SENDB, cursp(), idx, 0));
@@ -1095,6 +1096,7 @@ gen_vmassignment(codegen_scope *s, node *tree, int rhs, int val)
static void
gen_send_intern(codegen_scope *s)
{
+ push();pop(); /* space for a block */
pop();
genop(s, MKOP_ABC(OP_SEND, cursp(), new_msym(s, mrb_intern_lit(s->mrb, "intern")), 0));
push();

MODIFY
test/t/codegen.rb
test/t/codegen.rb
@@ -75,6 +75,16 @@ assert('negate literal register alignment') do
end
assert('register window of calls (#3783)') do
+ # NODE_FOR
+ assert_nothing_raised do
+ for i in []; end
+ end
+
+ # NODE_SYMBOLS
+ assert_nothing_raised do
+ %i(sym)
+ end
+
# NODE_SCALL
assert_nothing_raised do
Object.new&.__id__

Fixed register windows of OP_SENDs generated by NODE_{FOR,SYMBOLS}; ref #3783