1--TEST-- 2Self-referencing map entry GC - 002 3--FILE-- 4<?php 5 6class Value { 7 public function __construct(public readonly string $value) { 8 } 9} 10 11$map = new WeakMap(); 12$obj = new Value('a'); 13$map[$obj] = [$obj]; 14 15gc_collect_cycles(); 16 17var_dump($map); 18 19$obj = null; 20gc_collect_cycles(); 21 22var_dump($map); 23 24--EXPECTF-- 25object(WeakMap)#%d (1) { 26 [0]=> 27 array(2) { 28 ["key"]=> 29 object(Value)#%d (1) { 30 ["value"]=> 31 string(1) "a" 32 } 33 ["value"]=> 34 array(1) { 35 [0]=> 36 object(Value)#%d (1) { 37 ["value"]=> 38 string(1) "a" 39 } 40 } 41 } 42} 43object(WeakMap)#1 (0) { 44} 45