From:
Operating system: Linux
PHP version: 5.3.6
Package: *Regular Expressions
Bug Type: Bug
Bug description:Trivial RE failure: /([^b]*a*)*$/
Description:
------------
If I search in the string : 'aaaaaaaab'
with the RE: '/([^b]*a*)*$/'
then preg_replace fails with a backtrack-limit error. (error 2)
I have backtrack.limit configured to 32MB, so something is very wrong.
The example fails on several different PHP versions, CPU architectures and
Linux
Distros. However, using Perl for the same RE works fine.
Test script:
---------------
$contents = "aaaaaaaab";
$search = '/([^b]*a*)*$/';
$result = preg_replace($search,"x",$contents);
if ($result === NULL){
echo "preg failed, error is ".preg_last_error()."\n";
}else{
echo "success\n";
}
Expected result:
----------------
preg_replace shouldn't fail.
Actual result:
--------------
preg_replace returns NULL, and preg_last_error returns 2.
--
Edit bug report at http://bugs.php.net/bug.php?id=54614&edit=1
--
Try a snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=54614&r=trysnapshot52
Try a snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=54614&r=trysnapshot53
Try a snapshot (trunk):
http://bugs.php.net/fix.php?id=54614&r=trysnapshottrunk
Fixed in SVN:
http://bugs.php.net/fix.php?id=54614&r=fixed
Fixed in SVN and need be documented:
http://bugs.php.net/fix.php?id=54614&r=needdocs
Fixed in release:
http://bugs.php.net/fix.php?id=54614&r=alreadyfixed
Need backtrace:
http://bugs.php.net/fix.php?id=54614&r=needtrace
Need Reproduce Script:
http://bugs.php.net/fix.php?id=54614&r=needscript
Try newer version:
http://bugs.php.net/fix.php?id=54614&r=oldversion
Not developer issue:
http://bugs.php.net/fix.php?id=54614&r=support
Expected behavior:
http://bugs.php.net/fix.php?id=54614&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=54614&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=54614&r=submittedtwice
register_globals:
http://bugs.php.net/fix.php?id=54614&r=globals
PHP 4 support discontinued: http://bugs.php.net/fix.php?id=54614&r=php4
Daylight Savings: http://bugs.php.net/fix.php?id=54614&r=dst
IIS Stability:
http://bugs.php.net/fix.php?id=54614&r=isapi
Install GNU Sed:
http://bugs.php.net/fix.php?id=54614&r=gnused
Floating point limitations:
http://bugs.php.net/fix.php?id=54614&r=float
No Zend Extensions:
http://bugs.php.net/fix.php?id=54614&r=nozend
MySQL Configuration Error:
http://bugs.php.net/fix.php?id=54614&r=mysqlcfg
