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<?php declare(strict_types=1); function double(int $value) { return 2 * $value; } function coerceInt(string $value) : int { return $value; } $a = double(coerceInt("5")); var_dump($a);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: coerceInt(): Return value must be of type int, string returned in /in/dONJL:11 Stack trace: #0 /in/dONJL(13): coerceInt('5') #1 {main} thrown in /in/dONJL on line 11
Process exited with code 255.

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