From: benoit dot beraud at gmail dot com
Operating system: Win XP
PHP version: 5CVS-2006-06-30 (snap)
PHP Bug Type: Reproducible crash
Bug description: Php makes Apache crash with preg_match
Description:
------------
When executing the reproduce code, the function preg_match makes APache
restart with the 'traditionnal' error ("[notice] Parent: child process
exited with status 3221225477 -- Restarting.")
The script makes Apache crash with php 5.1.4 and the snapshot of php
5.2.0-2006-06-30. together with apache 2.0.58
Everything is ok with php 4.3.10 with apache 1.3.33
I've seen some corresponding bug in the DB but they do not seem to apply,
as in my case it was working in previous version of php (and probably
PECR) and now it does not work. Strange ...
I don't have any idea if it really comes from php or if it's an issue of
the PECR library or of apache 2.
I would have been happy to provide a bugtrace but my knowledge of php
compilation is still to limited to do it.
Thanks in advance for your help.
Reproduce code:
---------------
// 'Well-formed UTF-8'
$goodUtf8 =
'^([\x00-\x7f]|[\xc2-\xdf][\x80-\xbf]|\xe0[\xa0-\xbf][\x80-\xbf]|[\xe1-\xec][\x80-\xbf]{2}|\xed[\x80-\x9f][\x80-\xbf]|[\xee-\xef][\x80-\xbf]{2}|f0[\x90-\xbf][\x80-\xbf]{2}|[\xf1-\xf3][\x80-\xbf]{3}|\xf4[\x80-\x8f][\x80-\xbf]{2})*$';
// ISO-10646 'UCS'
$ucsUtf8 =
'^([\x00-\x7f]|[\xc0-\xdf][\x80-\xbf]|[\xe0-\xef][\x80-\xbf]{2}|[\xf0-\xf7][\x80-\xbf]{3}|[\xf8-\xfb][\x80-\xbf]{4}|[\xfc-\xfd][\x80-\xbf]{5})*$';
$inStr = "Complex models, such as activated sludge model No. 1 (ASM1),
have rarely been used in practice for process control or optimization. One
major reason for this is the computational effort demanded by these models
for both parameter estimation and simulation. Therefore, a linearized
version of the ASM1 model is developed and applied to the control and
optimization of a bench-scale alternating aerobic/anoxic activated sludge
system. The model prediction was used to optimize the aeration time by
manipulating tc (total cycle time) and fa (fraction of aeration cycle
time) while meeting the permit requirement of the effluent ammonia
concentration. The linear nature of the model facilitates its use for
on-line calculations, and error feedback is used to counteract problems of
model inaccuracy. The model was applied to two cases in which the influent
compositions were either known currently or only the previous day\'s
information was available. The average optimized fa was found to be 0.30
for the first case and 0.37 for the second case, when the maximum effluent
NH4+N concentration was set at 1 mg/l. The efficiency of nitrogen removal
was 76% for both test cases since nitrate could almost completely be
removed through adequate anoxic cycle ratios resulting from the fa
optimization.";
preg_match("/$goodUtf8|$ucsUtf8/",$inStr);
Expected result:
----------------
The function preg_match should check if the variable inStr is goodUtf or
ISO-10646 'UCS'.
--
Edit bug report at http://bugs.php.net/?id=37978&edit=1
--
Try a CVS snapshot (PHP 4.4):
http://bugs.php.net/fix.php?id=37978&r=trysnapshot44
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=37978&r=trysnapshot52
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=37978&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=37978&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=37978&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=37978&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=37978&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=37978&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=37978&r=support
Expected behavior: http://bugs.php.net/fix.php?id=37978&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=37978&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=37978&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=37978&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=37978&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=37978&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=37978&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=37978&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=37978&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=37978&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=37978&r=mysqlcfg
