From:
Operating system: Linux
PHP version: 5.3.6
Package: Variables related
Bug Type: Bug
Bug description:Corrupted referenced strings inside Closure
Description:
------------
This is a bug in 5.3.6, which did not occur in 5.3.5. When executing a
Closure,
and using a variable which references a string property of the context
class, the
original string property becomes corrupted. Its first characters become
corrupted,
resulting in an unexpected new string.
(Tested on several CentOS machines; 5.3.6 results in the bug, 5.3.5 does
not)
Step-by-step recreation: (code sample attached)
1. Define a string property in a class.
2. Define a Closure which accepts a parameter.
3. Execute that Closure, passing a parameter which is a reference to the
original
string property.
4. The original string property becomes corrupted. If you var_dump() it,
you
receive a corrupted string instead of your original string.
Test script:
---------------
class Foo
{
public function __construct()
{
$this->a = 'foo';
}
public function bug()
{
$a = &$this->a;
$b = function()use($a){
return strlen($a);
};
$b();
}
}
$foo = new Foo();
$foo->bug();
var_dump($foo->a);
Expected result:
----------------
String(3) "foo" (this happens in 5.3.5)
Actual result:
--------------
String(...) "{some_rubbish}oo" (this happens in 5.3.6)
--
Edit bug report at https://bugs.php.net/bug.php?id=55349&edit=1
--
Try a snapshot (PHP 5.4):
https://bugs.php.net/fix.php?id=55349&r=trysnapshot54
Try a snapshot (PHP 5.3):
https://bugs.php.net/fix.php?id=55349&r=trysnapshot53
Try a snapshot (trunk):
https://bugs.php.net/fix.php?id=55349&r=trysnapshottrunk
Fixed in SVN:
https://bugs.php.net/fix.php?id=55349&r=fixed
Fixed in SVN and need be documented:
https://bugs.php.net/fix.php?id=55349&r=needdocs
Fixed in release:
https://bugs.php.net/fix.php?id=55349&r=alreadyfixed
Need backtrace:
https://bugs.php.net/fix.php?id=55349&r=needtrace
Need Reproduce Script:
https://bugs.php.net/fix.php?id=55349&r=needscript
Try newer version:
https://bugs.php.net/fix.php?id=55349&r=oldversion
Not developer issue:
https://bugs.php.net/fix.php?id=55349&r=support
Expected behavior:
https://bugs.php.net/fix.php?id=55349&r=notwrong
Not enough info:
https://bugs.php.net/fix.php?id=55349&r=notenoughinfo
Submitted twice:
https://bugs.php.net/fix.php?id=55349&r=submittedtwice
register_globals:
https://bugs.php.net/fix.php?id=55349&r=globals
PHP 4 support discontinued:
https://bugs.php.net/fix.php?id=55349&r=php4
Daylight Savings: https://bugs.php.net/fix.php?id=55349&r=dst
IIS Stability:
https://bugs.php.net/fix.php?id=55349&r=isapi
Install GNU Sed:
https://bugs.php.net/fix.php?id=55349&r=gnused
Floating point limitations:
https://bugs.php.net/fix.php?id=55349&r=float
No Zend Extensions:
https://bugs.php.net/fix.php?id=55349&r=nozend
MySQL Configuration Error:
https://bugs.php.net/fix.php?id=55349&r=mysqlcfg
