From 3acaa44a70a44a816076dee65310f0f2487aeebd Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby-lang.org>
Date: Mon, 4 Sep 2017 06:51:31 +0900
Subject: Restructure `irep->outer` chain; fix #3804

Instead of `irep -> proc` chain, we use `irep -> irep` chain to
avoid GC bugs like #3804. We added `target_class` reference to
`mrb_irep` struct. That means one more word consumption per `irep`.
---
 src/state.c | 2 ++
 1 file changed, 2 insertions(+)

(limited to 'src/state.c')

diff --git a/src/state.c b/src/state.c
index f09b20903..039d67d57 100644
--- a/src/state.c
+++ b/src/state.c
@@ -157,6 +157,8 @@ mrb_irep_free(mrb_state *mrb, mrb_irep *irep)
   for (i=0; i<irep->rlen; i++) {
     mrb_irep_decref(mrb, irep->reps[i]);
   }
+  if (irep->outer)
+    mrb_irep_decref(mrb, irep->outer);
   mrb_free(mrb, irep->reps);
   mrb_free(mrb, irep->lv);
   if (irep->own_filename) {
-- 
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