From ef1158485b9b0ef2e52d9f3a539b41ca3cb3f73d Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby-lang.org>
Date: Tue, 30 May 2017 15:42:10 +0900
Subject: Check env context before jump from OP_RETURN; fix #3673

---
 src/vm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/vm.c b/src/vm.c
index a676cb58a..f300b47b4 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -1821,7 +1821,7 @@ RETRY_TRY_BLOCK:
             struct REnv *e = top_env(mrb, proc);
             mrb_callinfo *ce;
 
-            if (!MRB_ENV_STACK_SHARED_P(e)) {
+            if (!MRB_ENV_STACK_SHARED_P(e) || e->cxt.c != mrb->c) {
               localjump_error(mrb, LOCALJUMP_ERROR_RETURN);
               goto L_RAISE;
             }
-- 
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