From c7d2eaa3e84494245986066a4ffdc9a7968cb6ff Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Sat, 20 Aug 2022 12:58:17 +0900
Subject: [PATCH] Revert "vm.c (mrb_funcall_with_block): avoid use of
 MRB_METHOD_CFUNC_P()."

This reverts commit c28ac75a8728efbb08f1a818f2291fc53b1aa5f0.
This change caused SEGV in the case like the following:

```
class C
  class << self
    attr_accessor :a
    alias :const_missing :a=
  end
end
p C::CONST
```
---
 src/vm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/vm.c b/src/vm.c
index 598e87229..23ed1f8dc 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -664,7 +664,7 @@ mrb_funcall_with_block(mrb_state *mrb, mrb_value self, mrb_sym mid, mrb_int argc
     ci->mid = mid;
     ci->proc = MRB_METHOD_PROC_P(m) ? MRB_METHOD_PROC(m) : NULL;
 
-    if (ci->proc == NULL) {
+    if (MRB_METHOD_CFUNC_P(m)) {
       ci->stack[0] = self;
       val = MRB_METHOD_CFUNC(m)(mrb, self);
       cipop(mrb);