1--TEST-- 2Context switches are prevented during GC collect cycles 3--FILE-- 4<?php 5 6$fiber = new Fiber(function () { 7 call_user_func(function () { 8 $a = new class { public $next; }; 9 10 $b = new class { 11 public $next; 12 public function __destruct() { 13 Fiber::suspend(); 14 } 15 }; 16 17 $a->next = $b; 18 $b->next = $a; 19 }); 20 21 gc_collect_cycles(); 22}); 23 24$fiber->start(); 25 26?> 27--EXPECTF-- 28Fatal error: Uncaught FiberError: Cannot switch fibers in current execution context in %sno-switch-gc.php:%d 29Stack trace: 30#0 %sno-switch-gc.php(%d): Fiber::suspend() 31#1 [internal function]: class@anonymous->__destruct() 32#2 %sno-switch-gc.php(%d): gc_collect_cycles() 33#3 [internal function]: {closure}() 34#4 %sno-switch-gc.php(%d): Fiber->start() 35#5 {main} 36 thrown in %sno-switch-gc.php on line %d 37
