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From cba9aa759f7ce8a4a80e748eb451f679042cd74b Mon Sep 17 00:00:00 2001
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From: Father Chrysostomos <sprout@cpan.org>
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Date: Fri, 7 Apr 2017 14:08:02 -0700
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Subject: [PATCH] Crash with sub-in-stash
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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Ported to 5.24.1:
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commit 790acddeaa0d2c73524596048b129561225cf100
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Author: Father Chrysostomos <sprout@cpan.org>
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Date: Fri Apr 7 14:08:02 2017 -0700
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[perl #131085] Crash with sub-in-stash
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$ perl -e '$::{"A"} = sub {}; \&{"A"}'
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Segmentation fault (core dumped)
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The code that vivifies a typeglob out of a code ref assumed that the
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CV had a name hek, which is always the case when perl itself puts the
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code ref there (via ‘sub A{}’), but is not necessarily the case if
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someone is insinuating other stuff into the stash.
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Signed-off-by: Petr Písař <ppisar@redhat.com>
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---
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gv.c | 2 +-
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t/op/gv.t | 4 ++++
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2 files changed, 5 insertions(+), 1 deletion(-)
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diff --git a/gv.c b/gv.c
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index 3fda9b9..6690b64 100644
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--- a/gv.c
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+++ b/gv.c
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@@ -421,7 +421,7 @@ Perl_gv_init_pvn(pTHX_ GV *gv, HV *stash, const char *name, STRLEN len, U32 flag
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/* Not actually a constant. Just a regular sub. */
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CV * const cv = (CV *)has_constant;
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GvCV_set(gv,cv);
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- if (CvSTASH(cv) == stash && (
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+ if (CvNAMED(cv) && CvSTASH(cv) == stash && (
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CvNAME_HEK(cv) == GvNAME_HEK(gv)
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|| ( HEK_LEN(CvNAME_HEK(cv)) == HEK_LEN(GvNAME_HEK(gv))
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&& HEK_FLAGS(CvNAME_HEK(cv)) != HEK_FLAGS(GvNAME_HEK(gv))
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diff --git a/t/op/gv.t b/t/op/gv.t
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index 03ae46e..cdaaef5 100644
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--- a/t/op/gv.t
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+++ b/t/op/gv.t
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@@ -1170,6 +1170,10 @@ SKIP: {
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is ($? & 127, 0,"[perl #128597] No crash when gp_free calls ckWARN_d");
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}
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+# [perl #131085] This used to crash; no ok() necessary.
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+$::{"A131085"} = sub {}; \&{"A131085"};
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+
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+
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__END__
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Perl
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Rules
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--
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2.9.4
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