Description:
------------
I am using the ondrej-php compiled 7.0.7 packages on a up-to-date Ubuntu 14.04 LTS. I was doing some bad coding practises as per our current cms when a coredump occurred. I was able to create a test script that will reproducibly on my system will coredump apache. 
 
The original code was much longer and more complex with subclasses, but I was able to minimize it to the code below. Basically what I did was put the class into a global variable and the use that global variable to call a non-existing function. It coredumps at creating the class in constructor.

Constructing the class you are currently constructing into a global is a one thing that should not be allowed I think, which would fix this particular issue at least.

Test script:
---------------
<?php


class foo {
  public function __construct() {
  
    $_GLOBAL['bar'] = new foo();
  }
  
}

$foo = new foo();


?>

Expected result:
----------------
Error that you can't create the partial class in the constructor.

Actual result:
--------------
Coredump in apache child