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<?php class Foo {} $foo = new Foo(); $weakMap = new WeakMap(); $weakMap[$foo] = $foo; unset($foo); foreach ($weakMap as $prop => $value) { var_dump($prop, $value); }
Output for git.master, git.master_jit, rfc.property-hooks
object(Foo)#1 (0) { } object(Foo)#1 (0) { }

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