From 015f06ed8ed613492630cab0d60660fc7eecbe28 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Tue, 16 Jun 2020 12:08:29 +0900
Subject: Should not mark red (i.e. ROM allocated) objects.

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

(limited to 'src')

diff --git a/src/gc.c b/src/gc.c
index 4bee82364..28cab05b2 100644
--- a/src/gc.c
+++ b/src/gc.c
@@ -772,6 +772,7 @@ mrb_gc_mark(mrb_state *mrb, struct RBasic *obj)
 {
   if (obj == 0) return;
   if (!is_white(obj)) return;
+  if (is_red(obj)) return;
   mrb_assert((obj)->tt != MRB_TT_FREE);
   add_gray_list(mrb, &mrb->gc, obj);
 }
-- 
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