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<?php $array = array('toto' => null); isset($array['toto']); array_key_exists($array, 'toto');
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: array_key_exists(): Argument #2 ($array) must be of type array, string given in /in/pVAFu:5 Stack trace: #0 {main} thrown in /in/pVAFu on line 5
Process exited with code 255.

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