From 877f43bca5eb2d23610665dd8e03f04fa63c6b33 Mon Sep 17 00:00:00 2001
From: "Yukihiro \"Matz\" Matsumoto" <matz@ruby-lang.org>
Date: Mon, 13 Mar 2017 22:03:31 +0900
Subject: OP_BLKPUSH is invalid outside of methods; fix #3501

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

diff --git a/src/vm.c b/src/vm.c
index 59c8624e2..946d68323 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -1892,7 +1892,7 @@ RETRY_TRY_BLOCK:
       if (lv == 0) stack = regs + 1;
       else {
         struct REnv *e = uvenv(mrb, lv-1);
-        if (!e) {
+        if (!e || e->mid == 0) {
           localjump_error(mrb, LOCALJUMP_ERROR_YIELD);
           goto L_RAISE;
         }
-- 
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