From:             a at b dot c dot de
Operating system: Windows XP
PHP version:      5.0.3
PHP Bug Type:     Reproducible crash
Bug description:  Invalid object callbacks not caught in array_walk()

Description:
------------
Using array_walk will crash PHP if a method of an uninstantiated object
variable is used in the callback method. Other functions that take
variables (at least, usort(), array_map(), array_reduce()) error out
instead. There has to be at least one element in the array being walked.

Reproduce code:
---------------
$array = array('at least one element');

array_walk($array, array($nonesuchvar,'show'));


Expected result:
----------------
PHP 4.3.10's error message for this situation reads:

Warning:  array_walk(): Unable to call Array() - function does not exist
in ...

while PHP 5.0.3 also reports a Notice-level message that $nonesuchvar is
undefined.

Actual result:
--------------
A Notice-level message that $nonesuchvar is undefined, then a Windows core
dump.


-- 
Edit bug report at http://bugs.php.net/?id=31720&edit=1
-- 
Try a CVS snapshot (php4):   http://bugs.php.net/fix.php?id=31720&r=trysnapshot4
Try a CVS snapshot (php5.0): 
http://bugs.php.net/fix.php?id=31720&r=trysnapshot50
Try a CVS snapshot (php5.1): 
http://bugs.php.net/fix.php?id=31720&r=trysnapshot51
Fixed in CVS:                http://bugs.php.net/fix.php?id=31720&r=fixedcvs
Fixed in release:            http://bugs.php.net/fix.php?id=31720&r=alreadyfixed
Need backtrace:              http://bugs.php.net/fix.php?id=31720&r=needtrace
Need Reproduce Script:       http://bugs.php.net/fix.php?id=31720&r=needscript
Try newer version:           http://bugs.php.net/fix.php?id=31720&r=oldversion
Not developer issue:         http://bugs.php.net/fix.php?id=31720&r=support
Expected behavior:           http://bugs.php.net/fix.php?id=31720&r=notwrong
Not enough info:             
http://bugs.php.net/fix.php?id=31720&r=notenoughinfo
Submitted twice:             
http://bugs.php.net/fix.php?id=31720&r=submittedtwice
register_globals:            http://bugs.php.net/fix.php?id=31720&r=globals
PHP 3 support discontinued:  http://bugs.php.net/fix.php?id=31720&r=php3
Daylight Savings:            http://bugs.php.net/fix.php?id=31720&r=dst
IIS Stability:               http://bugs.php.net/fix.php?id=31720&r=isapi
Install GNU Sed:             http://bugs.php.net/fix.php?id=31720&r=gnused
Floating point limitations:  http://bugs.php.net/fix.php?id=31720&r=float
No Zend Extensions:          http://bugs.php.net/fix.php?id=31720&r=nozend
MySQL Configuration Error:   http://bugs.php.net/fix.php?id=31720&r=mysqlcfg

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