Bug 767608 – Memory leak with non-matching named captures

Bugzilla will be upgraded to version 5.0. The upgrade date is tentatively scheduled for 2 December 2018, pending final testing and feedback.

Bug 767608 - Memory leak with non-matching named captures

Summary:	Memory leak with non-matching named captures

Status:	CLOSED ERRATA

Aliases:	None

Product:	Red Hat Enterprise Linux 6
Classification:	Red Hat
Component:	perl (Show other bugs)
Sub Component:
Version:	6.2
Hardware:	Unspecified Unspecified

Priority	high Severity medium
Target Milestone:	rc
Target Release:	---
Assigned To:	Petr Pisar
QA Contact:	Martin Kyral
Docs Contact:

URL:	https://rt.perl.org/rt3/Public/Bug/Di...
Whiteboard:
Keywords:	Patch

Depends On:
Blocks:	947775 960054
	Show dependency tree / graph

Reported:	2011-12-14 08:40 EST by Petr Pisar
Modified:	2013-11-20 23:40 EST (History)
CC List:	5 users (show)

See Also:
Fixed In Version:	perl-5.10.1-132.el6
Doc Type:	Bug Fix
Doc Text:	Cause: Referring to named capturing group when the group has not matched. Consequence: A memory leaks. Fix: Code to obtain a named capture group value has been corrected not to allocated a new memory if no match has occurred. Result: Using value of non-matched capturing group does not leak memory anymore.
Story Points:	---
Clone Of:	767597
Environment:
Last Closed:	2013-11-20 23:40:09 EST
Type:	---
Regression:	---
Mount Type:	---
Documentation:	---
CRM:
Verified Versions:
Category:	---
oVirt Team:	---
RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---

Attachments	(Terms of Use)
Upstream fix applicable to perl-5.10.1 (1.91 KB, patch) 2011-12-15 07:51 EST, Petr Pisar	no flags	Details \| Diff
Add an attachment (proposed patch, testcase, etc.)

External Trackers
Tracker	ID	Priority	Status	Summary	Last Updated
Red Hat Product Errata	RHBA-2013:1534	normal	SHIPPED_LIVE	perl bug fix and enhancement update	2013-11-20 16:40:56 EST

Groups: None (edit)

Description Petr Pisar 2011-12-14 08:40:07 EST

+++ This bug was initially created as a clone of Bug #767597 +++

Referring non-matched named capture leaks memory:

for (1..10_000_000) {
  if ("foo" =~ /(foo|(?<capture>bar))?/) {
    my $capture = $+{capture}
  }
}


This is tracked by upstream (https://rt.perl.org/rt3/Public/Bug/Display.html?id=78266) and fixed by commit 7402016d87474403eea5c52dc2c071f68cbbe25c.

----

RHEL-6.2 (perl-5.10.1-119.el6_1.1.x86_64) affected.

Comment 2 Petr Pisar 2011-12-14 09:06:30 EST

Named captures are not supported by perl-5.8 and older. This is not an issue for older RHEL releases.

Comment 3 Petr Pisar 2011-12-15 07:51:09 EST

Created attachment 547216 [details]
Upstream fix applicable to perl-5.10.1

Comment 12 errata-xmlrpc 2013-11-20 23:40:09 EST

Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.

For information on the advisory, and where to find the updated
files, follow the link below.

If the solution does not work for you, open a new bug report.

http://rhn.redhat.com/errata/RHBA-2013-1534.html

Note You need to log in before you can comment on or make changes to this bug.