Description:
------------
A segfault occurs when using callbacks to functions that get triggered via __call.

In the case of what's actually being called, the class is derived from mysqli.

I haven't done extensive testing, but I was getting segfaults with both array_map and array_filter. It seems to be a general callback-related issue.

Dual Opteron
Kernel is SMP + 64bit
Configure:

./configure \
--with-pgsql \
--with-xmlrpc \
--with-apxs2=/usr/local/apache2/bin/apxs \
--with-mysql=/usr --with-mysqli=/usr/bin/mysql_config \
--prefix=/usr/local/apache2/php \
--with-config-file-path=/usr/local/apache2/php \
--enable-force-cgi-redirect \
--disable-magic-quotes \
--with-curl \
--with-gd --with-jpeg-dir=/usr/lib --with-png-dir=/usr/lib --with-freetype-dir=/usr/lib --with-zlib-dir=/usr/lib


Reproduce code:
---------------
<?php
class Faulty
{
    function __call($Method,$Args)
    {
        switch($Method)
        {
            case 'seg':
              echo "I hate me";
            break;
        }
    }

    function NormalMethod($Args)
    {
       echo "I heart me"; 
    }
}

$Faulty = new Faulty();
$Array = array('Some junk','Some other junk');

// This causes a seg fault.
$Failure = array_map(array($Faulty,'seg'),$Array);

// This does not.
$Failure = array_map(array($Faulty,'NormalMethod'),$Array);


?>

Expected result:
----------------
Not seg faulting.

Actual result:
--------------
Segfaulting.