From d40d8b3caf40e0b1769bb4a196aa7740aef4737e Mon Sep 17 00:00:00 2001
From: Koichi Sasada <ko1@atdot.net>
Date: Thu, 18 Jul 2019 22:59:44 +0900
Subject: check saved_ec.cfp

---
 cont.c | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

(limited to 'cont.c')

diff --git a/cont.c b/cont.c
index c16c697ee7..ba6120f9cd 100644
--- a/cont.c
+++ b/cont.c
@@ -834,7 +834,9 @@ cont_mark(void *ptr)
     RUBY_MARK_ENTER("cont");
     rb_gc_mark_no_pin(cont->value);
 
-    rb_execution_context_mark(&cont->saved_ec);
+    if (cont->saved_ec.cfp) {
+        rb_execution_context_mark(&cont->saved_ec);
+    }
     rb_gc_mark(cont_thread_value(cont));
 
     if (cont->saved_vm_stack.ptr) {
-- 
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