1--TEST-- 2Bug #70805 (Segmentation faults whilst running Drupal 8 test suite) 3--FILE-- 4<?php 5class A { 6} 7 8class B { 9} 10 11class C { 12 public function __destruct() { 13 if (isset($GLOBALS["a"])) { 14 unset($GLOBALS["array"]); 15 unset($GLOBALS["a"]); // this will be called in gc_colloct_roots and put $a into gc roots buf 16 } 17 } 18} 19 20$a = new A; 21$a->b = new B; 22$a->b->a = $a; 23 24$i = 0; 25 26$c = new A; 27$array = array($c); //This is used to leave a room for $GLOBALS["a"] 28unset($c); 29 30while ($i++ < 9997) { 31 $t = []; 32 $t[] = &$t; 33 unset($t); 34} 35$t = [new C]; 36$t[] = &$t; 37unset($t); // This is used to trigger C::__destruct while doing gc_colloct_roots 38 39$e = $a; 40unset($a); // This one can not be putted into roots buf because it's full, thus gc_colloct_roots will be called, 41 // but C::__destructor which is called in gc_colloct_roots will put $a into buf 42 // which will make $a be putted into gc roots buf twice 43var_dump(gc_collect_cycles()); 44?> 45--EXPECT-- 46int(0) 47
