Edit report at https://bugs.php.net/bug.php?id=60927&edit=1
ID: 60927
Updated by: johan...@php.net
Reported by: jimmy at axenhus dot com
Summary: Recursive functions for preg_replace_callback causes
SEGFAULT
-Status: Bogus
+Status: Not a bug
Type: Bug
Package: PCRE related
Operating System: Ubuntu 11.04
PHP Version: 5.3.9
Block user comment: N
Private report: N
New Comment:
.
Previous Comments:
------------------------------------------------------------------------
[2012-01-29 19:47:53] johan...@php.net
Thank you for taking the time to write to us, but this is not
a bug. Please double-check the documentation available at
http://www.php.net/manual/ and the instructions on how to report
a bug at http://bugs.php.net/how-to-report.php
Recursion ends in a stack overflow. A stack overflow makes the operating system
kill the process.
------------------------------------------------------------------------
[2012-01-29 19:33:01] jimmy at axenhus dot com
Description:
------------
Using recursive functions for preg_replace_callback that never ends PHP will
exit with a SEGFAULT (unexpected signal 11) due to a function stack overflow.
It's expected that it should never end and therefore PHP should abort the
execution. However PHP should output a helpful error message rather than just
aborting it. Depending on your code this could be a major issue to debug. (I
was using Drupal and it look me hours to find the source.)
Test script:
---------------
<?php
function a() {
b();
}
function b() {
a();
}
preg_replace_callback("/0/s", 'a', "0");
echo "We made it my friend!";
Expected result:
----------------
Some sort of error message that the callback stack limit has been reached.
Actual result:
--------------
A 500 Internal Server error (Apache with mod_fcgid) and a SEGFAULT in the error
log.
------------------------------------------------------------------------
--
Edit this bug report at https://bugs.php.net/bug.php?id=60927&edit=1
