Date: Wed, 2 Jan 2013 23:45:13 +0100 (CET) From: Slaven Rezic <slaven@rezic.de> To: FreeBSD-gnats-submit@FreeBSD.org Subject: ports/174917: p5-XML-Twig and p5-XML-LibXML coexistence problem Message-ID: <201301022245.r02MjD9d021061@cvrsnica.herceg.de> Resent-Message-ID: <201301022250.r02Mo1gs076912@freefall.freebsd.org>
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>Number: 174917
>Category: ports
>Synopsis: p5-XML-Twig and p5-XML-LibXML coexistence problem
>Confidential: no
>Severity: serious
>Priority: medium
>Responsible: freebsd-ports-bugs
>State: open
>Quarter:
>Keywords:
>Date-Required:
>Class: sw-bug
>Submitter-Id: current-users
>Arrival-Date: Wed Jan 02 22:50:01 UTC 2013
>Closed-Date:
>Last-Modified:
>Originator: Slaven Rezic
>Release: FreeBSD 9.0-RELEASE amd64
>Organization:
www.rezic.de
>Environment:
System: FreeBSD cvrsnica.herceg.de 9.0-RELEASE FreeBSD 9.0-RELEASE #0: Tue Jan 3 07:46:30 UTC 2012 root@farrell.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64
Also happens on a 9.1-RELEASE system.
All components here (perl, p5-XML-LibXML, p5-XML-Twig) are installed
using packages.
>Description:
A perl script which uses both XML::LibXML and XML::Twig may
segfault when dealing with larger XML structures.
The script below reproduces the problem. The segfault goes
away if the "use XML::LibXML" line is removed (note that no
XML::LibXML calls are used here at all) or if the number of
generated elements is lowered from 20000 to 10000.
gdb shows a very long stacktrace, with many 1000 frames.
>How-To-Repeat:
#!/usr/bin/perl -w
use strict;
use XML::LibXML;
use XML::Twig;
{
my $twig = XML::Twig->new;
my $gpx = XML::Twig::Elt->new('gpx');
$twig->set_root($gpx);
my $trkxml = XML::Twig::Elt->new("trk");
$trkxml->paste(last_child => $gpx);
for (1..20000) {
my $trksegxml = XML::Twig::Elt->new("trkseg");
$trksegxml->paste(last_child => $trkxml);
}
}
__END__
>Fix:
Not known.
>Release-Note:
>Audit-Trail:
>Unformatted:
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