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<?php print_r(array_merge([], null));
Output for git.master, rfc.property-hooks, git.master_jit
Fatal error: Uncaught TypeError: array_merge(): Argument #2 must be of type array, null given in /in/fGBP7:3 Stack trace: #0 /in/fGBP7(3): array_merge(Array, NULL) #1 {main} thrown in /in/fGBP7 on line 3
Process exited with code 255.

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