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<?php class Bar { private $a; public function __construct($a) { $this->a = (bool) $a; } public function a() { return $this->a; } } function foo(callable $x) { $object = new Bar(false); $x($object); return $object->a(); } var_dump(foo('Bar::__construct'));
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: foo(): Argument #1 ($x) must be of type callable, string given, called in /in/kPpaY on line 25 and defined in /in/kPpaY:18 Stack trace: #0 /in/kPpaY(25): foo('Bar::__construc...') #1 {main} thrown in /in/kPpaY on line 18
Process exited with code 255.

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