From: Adrian M. Enache <enache@rdslink.ro>
Date: Mon, 20 Jan 2003 01:54:07 +0000 (+0000)
Subject: [perl #20408] SV's SvPVX get freed even when its SvLEN is zero
X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=commitdiff_plain;h=2c28e92fc113ea28fd1822b2d63d3c1bfedbac8f;p=p5sagit%2Fp5-mst-13.2.git

[perl #20408] SV's SvPVX get freed even when its SvLEN is zero
From: "enache@rdslink.ro (via RT)" <perlbug-followup@perl.org>
Message-Id: <rt-20408-49009.18.2567818321236@bugs6.perl.org>

p4raw-id: //depot/perl@18522
---

diff --git a/pp_hot.c b/pp_hot.c
index 461c666..1a40441 100644
--- a/pp_hot.c
+++ b/pp_hot.c
@@ -2129,7 +2129,8 @@ PP(pp_subst)
 	    sv_catpvn(dstr, s, strend - s);
 
 	(void)SvOOK_off(TARG);
-	Safefree(SvPVX(TARG));
+	if (SvLEN(TARG))
+	    Safefree(SvPVX(TARG));
 	SvPVX(TARG) = SvPVX(dstr);
 	SvCUR_set(TARG, SvCUR(dstr));
 	SvLEN_set(TARG, SvLEN(dstr));