From 63aab7ecaa6e826f845c405894bd8c4b6f601b39 Mon Sep 17 00:00:00 2001
From: Father Chrysostomos <sprout@cpan.org>
Date: Sun, 3 Jul 2016 22:23:34 -0700
Subject: [PATCH] [perl #128532] Crash vivifying stub in deleted pkg
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v5.17.0-515-g186a5ba, which added newSTUB, did not take into account
that a GV may have a null GvSTASH pointer, if its stash has been
freed, so this crashes:

delete $My::{"Foo::"}; \&My::Foo::foo

Signed-off-by: Petr Písař <ppisar@redhat.com>
---
 op.c       | 2 +-
 t/op/ref.t | 6 +++++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/op.c b/op.c
index 46e76ac..4735d1b 100644
--- a/op.c
+++ b/op.c
@@ -9081,7 +9081,7 @@ Perl_newSTUB(pTHX_ GV *gv, bool fake)
     assert(!GvCVu(gv));
     GvCV_set(gv, cv);
     GvCVGEN(gv) = 0;
-    if (!fake && HvENAME_HEK(GvSTASH(gv)))
+    if (!fake && GvSTASH(gv) && HvENAME_HEK(GvSTASH(gv)))
 	gv_method_changed(gv);
     if (SvFAKE(gv)) {
 	cvgv = gv_fetchsv((SV *)gv, GV_ADDMULTI, SVt_PVCV);
diff --git a/t/op/ref.t b/t/op/ref.t
index 19a44bb..84d9217 100644
--- a/t/op/ref.t
+++ b/t/op/ref.t
@@ -8,7 +8,7 @@ BEGIN {
 
 use strict qw(refs subs);
 
-plan(235);
+plan(236);
 
 # Test this first before we extend the stack with other operations.
 # This caused an asan failure due to a bad write past the end of the stack.
@@ -124,6 +124,10 @@ is (join(':',@{$spring2{"foo"}}), "1:2:3:4");
     is ($called, 1);
 }
 is ref eval {\&{""}}, "CODE", 'reference to &{""} [perl #94476]';
+delete $My::{"Foo::"}; 
+is ref \&My::Foo::foo, "CODE",
+  'creating stub with \&deleted_stash::foo [perl #128532]';
+
 
 # Test references to return values of operators (TARGs/PADTMPs)
 {
-- 
2.5.5