From 393133e741bf168c78630c81ff2c7767fef018a6 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby.or.jp>
Date: Wed, 22 Nov 2017 12:18:20 +0900
Subject: Should have marked all ensure stack entries; fix #3855 fix #3856

---
 src/gc.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/src/gc.c b/src/gc.c
index 6d2b18b96..d5a55bde0 100644
--- a/src/gc.c
+++ b/src/gc.c
@@ -599,8 +599,7 @@ mark_context(mrb_state *mrb, struct mrb_context *c)
     }
   }
   /* mark ensure stack */
-  for (i=0; i<c->esize; i++) {
-    if (c->ensure[i] == NULL) break;
+  for (i=0; i<c->eidx; i++) {
     mrb_gc_mark(mrb, (struct RBasic*)c->ensure[i]);
   }
   /* mark fibers */
-- 
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