From e7e69c85c7e8e0cb75b831e606ad4f26f18b11ff Mon Sep 17 00:00:00 2001
From: Nicolas R <[email protected]>
Date: Mon, 31 Oct 2016 11:53:17 -0600
Subject: [PATCH] Avoid a segfault when untying an object
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Check if the tied object has a stash set
before calling UNTIE method.

Signed-off-by: Petr Písař <[email protected]>
---
 pp_sys.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/pp_sys.c b/pp_sys.c
index 672e7de08e..6d4dd86b7f 100644
--- a/pp_sys.c
+++ b/pp_sys.c
@@ -1017,7 +1017,7 @@ PP(pp_untie)
 
     if ((mg = SvTIED_mg(sv, how))) {
 	SV * const obj = SvRV(SvTIED_obj(sv, mg));
-        if (obj) {
+        if (obj && SvSTASH(obj)) {
 	    GV * const gv = gv_fetchmethod_autoload(SvSTASH(obj), "UNTIE", FALSE);
 	    CV *cv;
 	    if (gv && isGV(gv) && (cv = GvCV(gv))) {
-- 
2.13.6