1--TEST-- 2Bug #24573 (debug_backtrace() crashes if $this is set to null) 3--FILE-- 4<?php 5 6class Foo { 7 function Bar() { 8 $__this = $this; 9 $this = null; 10 debug_backtrace(); 11 $this = $__this; 12 } 13} 14 15$f = new Foo; 16 17$f->Bar(); 18 19echo "OK\n"; 20 21?> 22--EXPECTF-- 23 24Fatal error: Cannot re-assign $this in %s on line %d