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<?php $a = null; $b = array( 1,2,3); var_dump(array_merge($a, $b));
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: array_merge(): Argument #1 must be of type array, null given in /in/4vURI:6 Stack trace: #0 /in/4vURI(6): array_merge(NULL, Array) #1 {main} thrown in /in/4vURI on line 6
Process exited with code 255.

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