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<?php declare(strict_types=1); function wantString(string $s): void {}; $str = 'foo'; wantString($str); $f = static function() use(&$str): void { $str = 42; }; $f(); wantString($str);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: wantString(): Argument #1 ($s) must be of type string, int given, called in /in/J1GeF on line 14 and defined in /in/J1GeF:3 Stack trace: #0 /in/J1GeF(14): wantString(42) #1 {main} thrown in /in/J1GeF on line 3
Process exited with code 255.

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