#27951 [Opn]: debug_backtrace crash after using ++ on unassigned overloaded object property
ID: 27951
User updated by: calum at lasham dot com
Reported By: calum at lasham dot com
Status: Open
Bug Type: Reproducible crash
Operating System: Windows XP
PHP Version: 5CVS-2004-04-11 (dev)
New Comment:
expected result should be a backtrace
Previous Comments:
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[2004-04-11 11:11:08] calum at lasham dot com
Description:
------------
When using the ++ operator on an overloaded object property that's not
assigned a value, a debug_backtrace() in another unrelated object
causes a crash. See example code to reproduce the problem.
Note 1: The script executes correctly if, in the example code...
$foo->bar++;
is replaced with...
$x = $foo->bar;
$x++;
$foo->bar = $x;
Note 2: if the __set method in class Setter actually sets the variable
on the object the script executes correctly.
The bug appears in php5rc1 and the snapshot Built On: Apr 11, 2004
10:30 GMT. crash occurs when using php as apache module or from
command line.
Reproduce code:
---------------
<?php
class Setter {
function __get($nm){ }
function __set($nm, $val){ }
}
class Test {
function backtrace(){
debug_backtrace();
}
}
$foo = new Setter();
$foo->bar++;
$t = new Test();
$t->backtrace();
?>
Expected result:
----------------
"got exception" printed
Actual result:
--------------
apache service crash
------------------------------------------------------------------------
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Edit this bug report at http://bugs.php.net/?id=27951&edit=1
Thread (3 messages)