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<?php $m1 = new Map(array('a' => 1, 'b' => 2)); $m2 = new Map(array('b' => 3, 'c' => 4)); var_dump($m1 += $m2);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: Class "Map" not found in /in/0sqW2:3 Stack trace: #0 {main} thrown in /in/0sqW2 on line 3
Process exited with code 255.

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