From af85b1fbed14b1cab54642eedef8dce3e0c273b5 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Thu, 6 Jul 2023 22:57:14 +0900
Subject: [PATCH] gc.c (gc_mark_gray_list): cut `gcnext` link

---
 src/gc.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/src/gc.c b/src/gc.c
index 6172ccf6f..b2316f581 100644
--- a/src/gc.c
+++ b/src/gc.c
@@ -981,6 +981,7 @@ gc_mark_gray_list(mrb_state *mrb, mrb_gc *gc) {
   while (gc->gray_list) {
     struct RBasic *obj = gc->gray_list;
     gc->gray_list = obj->gcnext;
+    obj->gcnext = NULL;
     gc_mark_children(mrb, gc, obj);
   }
 }