Bug #62339 [NEW]: zend_mm_heap corrupted when trait is autoloaded after a class that uses it.
From: manchokapitancho at gmail dot com
Operating system: win 7
PHP version: 5.4.4
Package: Reproducible crash
Bug Type: Bug
Bug description:zend_mm_heap corrupted when trait is autoloaded after a class that uses it.
Description:
------------
Bugs #61998 and #62234 seem to be really close to this:
PHP crashes after the script finishes. It echoes "zend_mm_heap corrupted".
Necessary components (ALL required):
1. A class that uses a trait.
2. The trait should contain a method that also exists in the class.
3. This trait method is loaded as an alias in the class.
4. The trait should be in a separate file that is loaded after the file
that
contains the class (__autoload)
5. There should be some other code loaded and parsed. The amount of code
has some
randomness but a class with 5000 methods usually works :)
Note: there is a serious randomness in the crash. Sometimes I get it
constantly,
sometimes it crashes when called from apache only and sometimes it may
crash once
and then start working fine.
Test script:
---------------
main.php
---------
function __autoload ($class) {
include 'trait.php';
}
include 'demo.php';
$demo = new demo;
echo $demo->someFunc0();
echo $demo->broken();
trait.php
----------
trait a {
function broken() { return 'broken'; }
}
demo.php
---------
class demo {
use a { broken as private broken_old; }
function broken() { return "OK:" . $this->broken_old(); }
function someFunc0(){return 0;}
... //a small number of method may not trigger that crash.
function someFunc5000(){return 5000;}
}
Expected result:
----------------
OK:broken
Actual result:
--------------
OK:broken
zend_mm_heap corrupted
--
Edit bug report at https://bugs.php.net/bug.php?id=62339&edit=1
--
Try a snapshot (PHP 5.4): https://bugs.php.net/fix.php?id=62339&r=trysnapshot54
Try a snapshot (PHP 5.3): https://bugs.php.net/fix.php?id=62339&r=trysnapshot53
Try a snapshot (trunk): https://bugs.php.net/fix.php?id=62339&r=trysnapshottrunk
Fixed in SVN: https://bugs.php.net/fix.php?id=62339&r=fixed
Fixed in SVN and need be documented: https://bugs.php.net/fix.php?id=62339&r=needdocs
Fixed in release: https://bugs.php.net/fix.php?id=62339&r=alreadyfixed
Need backtrace: https://bugs.php.net/fix.php?id=62339&r=needtrace
Need Reproduce Script: https://bugs.php.net/fix.php?id=62339&r=needscript
Try newer version: https://bugs.php.net/fix.php?id=62339&r=oldversion
Not developer issue: https://bugs.php.net/fix.php?id=62339&r=support
Expected behavior: https://bugs.php.net/fix.php?id=62339&r=notwrong
Not enough info: https://bugs.php.net/fix.php?id=62339&r=notenoughinfo
Submitted twice: https://bugs.php.net/fix.php?id=62339&r=submittedtwice
register_globals: https://bugs.php.net/fix.php?id=62339&r=globals
PHP 4 support discontinued: https://bugs.php.net/fix.php?id=62339&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=62339&r=dst
IIS Stability: https://bugs.php.net/fix.php?id=62339&r=isapi
Install GNU Sed: https://bugs.php.net/fix.php?id=62339&r=gnused
Floating point limitations: https://bugs.php.net/fix.php?id=62339&r=float
No Zend Extensions: https://bugs.php.net/fix.php?id=62339&r=nozend
MySQL Configuration Error: https://bugs.php.net/fix.php?id=62339&r=mysqlcfg
Thread (10 messages)
- manchokapitancho at gmail dot com