Description:
------------
Bugs #61998 and #62234 seem to be really close to this:

PHP crashes after the script finishes. It echoes "zend_mm_heap corrupted".
Necessary components (ALL required):
1. A class that uses a trait. 
2. The trait should contain a method that also exists in the class. 
3. This trait method is loaded as an alias in the class.
4. The trait should be in a separate file that is loaded after the file that 
contains the class (__autoload)
5. There should be some other code loaded and parsed. The amount of code has some 
randomness but a class with 5000 methods usually works :)

Note: there is a serious randomness in the crash. Sometimes I get it constantly, 
sometimes it crashes when called from apache only and sometimes it may crash once 
and then start working fine.

Test script:
---------------
main.php
---------
function __autoload ($class) {
    include 'trait.php';
}
include 'demo.php';
$demo = new demo;
echo $demo->someFunc0();
echo $demo->broken();

trait.php
----------
trait a {
    function broken() { return 'broken'; }
}

demo.php
---------
class demo { 
    use a { broken as private broken_old; } 
    function broken() { return "OK:" . $this->broken_old(); } 
    function someFunc0(){return 0;}
... //a small number of method may not trigger that crash.
    function someFunc5000(){return 5000;}
}



Expected result:
----------------
OK:broken

Actual result:
--------------
OK:broken
zend_mm_heap corrupted