From a6283dbdf3747b9cf9641b1570e01bbc8ea54e7d Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Chris=20Hasi=C5=84ski?= <krzysztof.hasinski@gmail.com>
Date: Mon, 13 Apr 2026 13:40:35 +0200
Subject: [PATCH] Clear existing aspec bits before setting new ones in
 mrb_proc_set_cfunc_aspec

---
 include/mruby/proc.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/include/mruby/proc.h b/include/mruby/proc.h
index 060471d81..01bc0f75f 100644
--- a/include/mruby/proc.h
+++ b/include/mruby/proc.h
@@ -147,6 +147,7 @@ mrb_proc_decompress_caspec(uint32_t flags)
 static inline void
 mrb_proc_set_cfunc_aspec(struct RProc *p, mrb_aspec aspec)
 {
+  p->flags &= ~(MRB_PROC_NOARG | MRB_PROC_CASPEC_MASK);
   if (aspec == 0) {
     p->flags |= MRB_PROC_NOARG;
   }