Edit report at https://bugs.php.net/bug.php?id=55365&edit=1
ID: 55365
Updated by: fel...@php.net
Reported by: dan at velsoft dot com
Summary: Using reference variable to $this in callback causes
a segfault
-Status: Open
+Status: Feedback
Type: Bug
Package: Reproducible crash
Operating System: OS X 10.7
PHP Version: 5.3.6
Block user comment: N
Private report: N
New Comment:
Thank you for this bug report. To properly diagnose the problem, we
need a backtrace to see what is happening behind the scenes. To
find out how to generate a backtrace, please read
http://bugs.php.net/bugs-generating-backtrace.php for *NIX and
http://bugs.php.net/bugs-generating-backtrace-win32.php for Win32
Once you have generated a backtrace, please submit it to this bug
report and change the status back to "Open". Thank you for helping
us make PHP better.
I can't reproduce it on linux 32 bit.
Previous Comments:
------------------------------------------------------------------------
[2011-08-04 20:32:51] dan at velsoft dot com
Description:
------------
Using a reference variable to $this within an anonymous function, in a class
function causes a segfault. This previously worked in PHP 5.3.5.
The segfault can be caused either when using the function as a closure, or as
an
anonymous function.
The GDB output:
GNU gdb 6.3.50-20050815 (Apple version gdb-1705) (Fri Jul 1 10:50:06 UTC 2011)
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB. Type "show warranty" for details.
This GDB was configured as "x86_64-apple-darwin"...Reading symbols for shared
libraries ...................... done
(gdb) run segfault.php
Starting program: /usr/bin/php segfault.php
Reading symbols for shared libraries
+++++++++++++++++++++...........................................................
............................................................... done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Reading symbols for shared libraries . done
Program received signal EXC_BAD_ACCESS, Could not access memory.
Reason: KERN_INVALID_ADDRESS at address: 0x00000001ffffffff
0x000000010035d53d in zend_std_get_method ()
Test script:
---------------
<?php
class Seg
{
public function fault()
{
$that = &$this;
$callback = function() use ($that){};
$callback(); // Causes a segfault
is_callable(function() use ($that){}); // Causes a segfault
}
}
$obj = new Seg();
for($i = 0; $i < 5000; $i++)
{
$obj->fault();
}
Expected result:
----------------
No segfault
Actual result:
--------------
Segfault
------------------------------------------------------------------------
--
Edit this bug report at https://bugs.php.net/bug.php?id=55365&edit=1
