Description:
------------
Hello, i have a problem with php when i use pcre regexp ((?<!href).)


Test script:
---------------
preg_match_all('#<a.*?href="([^<>]*?)\?img_id=(\d+)"\s*>((?<!href).)*<img.*?src="(.*?)"#i',$html,$outA)

Expected result:
----------------
array 

Actual result:
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Reading symbols from /usr/bin/php...(no debugging symbols found)...done.
(gdb) run /var/www/502.cz/web/nod/onny/index.php
Starting program: /usr/bin/php /var/www/502.cz/web/nod/onny/index.php
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
[New Thread 0x7fffec495700 (LWP 12351)]
[Thread 0x7fffec495700 (LWP 12351) exited]

Program received signal SIGSEGV, Segmentation fault.
0x00000000004811ed in ?? ()
(gdb) bt
#0  0x00000000004811ed in ?? ()
#1  0x0000000000483496 in ?? ()
#2  0x000000000048f798 in ?? ()
#3  0x0000000000483496 in ?? ()
#4  0x000000000048f798 in ?? ()
#5  0x0000000000483496 in ?? ()
.... same lines
#10900 0x0000000000483496 in ?? ()
#10901 0x000000000048fa8c in ?? ()
#10902 0x0000000000492e0c in php_pcre_exec ()
#10903 0x0000000000497ba8 in php_pcre_match_impl ()
#10904 0x0000000000498538 in ?? ()
#10905 0x000000000076a0f1 in ?? ()
#10906 0x0000000000723f87 in execute ()
#10907 0x00000000006c44dc in zend_execute_scripts ()
#10908 0x0000000000664523 in php_execute_script ()
#10909 0x000000000076ca83 in ?? ()
#10910 0x000000000043181a in ?? ()

#10911 0x00007ffff53b4ead in __libc_start_main () from /lib/x86_64-linux-gnu/libc.so.6

#10912 0x00000000004318ad in _start ()