Edit report at https://bugs.php.net/bug.php?id=62049&edit=1

 ID:                 62049
 User updated by:    arvids dot kokins at di dot lv
 Reported by:        arvids dot kokins at di dot lv
 Summary:            A specific regex/input combo crashes PHP
 Status:             Open
 Type:               Bug
 Package:            PCRE related
 Operating System:   Windows
 PHP Version:        5.4.3
 Block user comment: N
 Private report:     N

 New Comment:

Another example: http://ideone.com/L29ib
If I remove the round brackets, the example works though: 
http://ideone.com/3ILgY


Previous Comments:
------------------------------------------------------------------------
[2012-05-16 20:34:07] arvids dot kokins at di dot lv

Looks like a warning is thrown with an internal error: 
http://codepad.org/FmlJi8N9
Some configurations need bigger input strings to trigger a crash, some react 
differently...
Got HTTP error 101 (connection was reset) at home with the word "error" 
repeated 
25 times.

------------------------------------------------------------------------
[2012-05-16 19:58:30] nulle at gmx dot com

Apache 2.2.9
PHP 5.3.1
Windows
Everything works fine.

------------------------------------------------------------------------
[2012-05-16 15:54:06] arvids dot kokins at di dot lv

Description:
------------
Test script crashes on web server (Apache 2.2.21) only with "empty response" 
(324). Suspected to be a limit/overflow problem since it works if "errorerror" 
is 
replaced with "error".

Test script:
---------------
<?php
echo preg_match( '/^<a(.)+class="(.)?actor-link(.)?"(.)+>Super User<\/a>/', '<a 
class="actor-link" 
href="/errorerror.lv/lv/jomsocial/42-super-user/profile">Super User</a> added 2 
new photos in <a 
href="/errorerror.lv/lv/jomsocial/42-super-user/photos/album?albumid=1">crap</a>
 album' );
echo "\nFINISHED!";
?>

Expected result:
----------------
"1\nFINISHED"

Actual result:
--------------
HTTP error 324: empty response. Probably PHP crash. Apache didn't crash.


------------------------------------------------------------------------



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