1--TEST-- 2Bug #77793: Segmentation fault in extract() when overwriting reference with itself 3--FILE-- 4<?php 5 6$str = 'foo'; 7$vars = ['var' => $str . 'bar']; 8$var = &$vars['var']; 9extract($vars); 10var_dump($vars, $var); 11 12?> 13--EXPECT-- 14array(1) { 15 ["var"]=> 16 &string(6) "foobar" 17} 18string(6) "foobar" 19