From: stas at zend dot com
Operating system: *
PHP version: 5.2CVS-2007-11-05 (CVS)
PHP Bug Type: Scripting Engine problem
Bug description: Crash on using unitialized vals and __get/__set
Description:
------------
Code modifying the result of __get (erroneously) and using undefined
variables crashes, apparently because of unitialized_zval being freed.
Reproduce code:
---------------
<?php
class Foo {
function __get($k) {
return null;
}
function __set($k, $v) {
$this->$k = $v;
}
}
$c = new Foo();
$c->arr[0]["k"] = 1;
$c->arr[0]["k2"] = $ref;
for($cnt=0;$cnt<6;$cnt++) {
$ref = chop($undef);
$c->arr[$cnt]["k2"] = $ref;
}
?>
Expected result:
----------------
No crash :)
Actual result:
--------------
On windows - crash
On Unix debug -
php5/Zend/zend_hash.c(517) : ht=0xa533520 is being destroyed
--
Edit bug report at http://bugs.php.net/?id=43201&edit=1
--
Try a CVS snapshot (PHP 4.4):
http://bugs.php.net/fix.php?id=43201&r=trysnapshot44
Try a CVS snapshot (PHP 5.2):
http://bugs.php.net/fix.php?id=43201&r=trysnapshot52
Try a CVS snapshot (PHP 5.3):
http://bugs.php.net/fix.php?id=43201&r=trysnapshot53
Try a CVS snapshot (PHP 6.0):
http://bugs.php.net/fix.php?id=43201&r=trysnapshot60
Fixed in CVS: http://bugs.php.net/fix.php?id=43201&r=fixedcvs
Fixed in release:
http://bugs.php.net/fix.php?id=43201&r=alreadyfixed
Need backtrace: http://bugs.php.net/fix.php?id=43201&r=needtrace
Need Reproduce Script: http://bugs.php.net/fix.php?id=43201&r=needscript
Try newer version: http://bugs.php.net/fix.php?id=43201&r=oldversion
Not developer issue: http://bugs.php.net/fix.php?id=43201&r=support
Expected behavior: http://bugs.php.net/fix.php?id=43201&r=notwrong
Not enough info:
http://bugs.php.net/fix.php?id=43201&r=notenoughinfo
Submitted twice:
http://bugs.php.net/fix.php?id=43201&r=submittedtwice
register_globals: http://bugs.php.net/fix.php?id=43201&r=globals
PHP 3 support discontinued: http://bugs.php.net/fix.php?id=43201&r=php3
Daylight Savings: http://bugs.php.net/fix.php?id=43201&r=dst
IIS Stability: http://bugs.php.net/fix.php?id=43201&r=isapi
Install GNU Sed: http://bugs.php.net/fix.php?id=43201&r=gnused
Floating point limitations: http://bugs.php.net/fix.php?id=43201&r=float
No Zend Extensions: http://bugs.php.net/fix.php?id=43201&r=nozend
MySQL Configuration Error: http://bugs.php.net/fix.php?id=43201&r=mysqlcfg
