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<?php class Whatever { public function kissMe(Whatever $arg) { if ($arg === null) { echo 'no way'; } else { echo 'smooch'; } } } $whatever = new Whatever(); $nothing = null; $whatever->kissMe($whatever); $whatever->kissMe($nothing);
Output for git.master, git.master_jit, rfc.property-hooks
smooch Fatal error: Uncaught TypeError: Whatever::kissMe(): Argument #1 ($arg) must be of type Whatever, null given, called in /in/4OF7F on line 13 and defined in /in/4OF7F:4 Stack trace: #0 /in/4OF7F(13): Whatever->kissMe(NULL) #1 {main} thrown in /in/4OF7F on line 4
Process exited with code 255.

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