Bug #70868 [NEW]: PCRE JIT and pattern reuse segfault
From: marcio
Operating system:
PHP version: 7.0.0RC6
Package: PCRE related
Bug Type: Bug
Bug description:PCRE JIT and pattern reuse segfault
Description:
------------
It seems there is a conflict when reusing patters while PCRE JIT is
enabled, causing a segfault. It's an obscure bug that I couldn't find a
solution and had to disable PCRE JIT to get things working.
These are the (strange) requirements to reproduce the segfault:
1) code MUST be namespaced;
2) code must be run on a non debug build;
3) a preg_replace call must happen while iterating over a regex iterator
or derivated;
4) both the preg_replace and the regex iterator instance involved must
have the exact same regexp patter;
The test script may be easier to understand. Requirement 1 is really a
mystery to me :/
Test script:
---------------
<?php
namespace X;
$iterator =
new \RegexIterator(
new \ArrayIterator(['A.phpt', 'B.phpt', 'C.phpt']),
'/\.phpt$/'
)
;
foreach ($iterator as $foo) {
var_dump($foo);
preg_replace('/\.phpt$/', '', '');
}
echo "Done", PHP_EOL;
?>
Expected result:
----------------
No segfault.
Actual result:
--------------
Segfault.
--
Edit bug report at https://bugs.php.net/bug.php?id=70868&edit=1
--
Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=70868&r=trysnapshot54
Try a snapshot (PHP 5.5): https://bugs.php.net/fix.php?id=70868&r=trysnapshot55
Try a snapshot (trunk): https://bugs.php.net/fix.php?id=70868&r=trysnapshottrunk
Fixed in SVN: https://bugs.php.net/fix.php?id=70868&r=fixed
Fixed in release: https://bugs.php.net/fix.php?id=70868&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=70868&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=70868&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=70868&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=70868&r=support
Expected behavior: https://bugs.php.net/fix.php?id=70868&r=notwrong
Not enough info: https://bugs.php.net/fix.php?id=70868&r=notenoughinfo
Submitted twice: https://bugs.php.net/fix.php?id=70868&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=70868&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=70868&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=70868&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=70868&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=70868&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=70868&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=70868&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=70868&r=mysqlcfg
Thread (3 messages)
- marcio@php.net