Edit report at https://bugs.php.net/bug.php?id=63349&edit=1

 ID:                 63349
 User updated by:    phpwnd at gmail dot com
 Reported by:        phpwnd at gmail dot com
 Summary:            Segfault during GC
-Status:             Feedback
+Status:             Closed
 Type:               Bug
 Package:            Reproducible crash
 Operating System:   Gentoo Linux
 PHP Version:        5.4.8
 Block user comment: N
 Private report:     N

 New Comment:

Turning off zend.enable_gc does prevent the crash. I read #63055 before 
submitting this but I thought the fix went into 5.4.8 and I was hitting a 
different bug or a case not covered by the fix. Had I realized the fix was for 
the next version, I would have waited a little more.

I don't have an easy way to install a snapshot to reproduce this crash (which 
itself requires very specific conditions in my case) and I can't reproduce it 
without XDebug either. So here's what I'm going to do: I'm going to close this 
bug for now and I'll reopen it with more info if I can reproduce the crash 
later.


Previous Comments:
------------------------------------------------------------------------
[2012-10-25 05:24:59] larue...@php.net

Please try using this snapshot:

  http://snaps.php.net/php5.4-latest.tar.gz
 
For Windows:

  http://windows.php.net/snapshots/

This seems very similar to #63055, which was fixed a short time ago, could you 
please test with the sanpshot of 5.4?

------------------------------------------------------------------------
[2012-10-24 23:00:25] s...@php.net

Thanks for the report. Can you continue working on it and:
- Upload a script that reproduces the problem when XDebug is not installed
- Upload build & configuration information
- Try with zend.enable_gc = Off

------------------------------------------------------------------------
[2012-10-24 20:48:11] phpwnd at gmail dot com

Description:
------------
PHP 5.4.8 + XDebug 2.2.1, no other extensions

I've been experiencing a few segfaults lately. They've been a bit hard to 
reproduce because so far I've only hit them when using PHP_CodeCoverage and 
only on specific revisions of my code (adding or removing a single statement 
such as "$a=1;" would keep it from happening.)

I have gotten around rebuilding PHP with all the debug bells and whistles and 
the resulting backtrace (hopefully attached to this bug) indicates it's related 
to GC and/or PCRE. Adding a call to gc_collect_cycles() fixed it for me, at 
least for now.



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