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<?php error_reporting(E_ALL); function out(&$x) { $x = 'out'; } out($c = NULL); var_dump($c);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: out(): Argument #1 ($x) cannot be passed by reference in /in/JfD5Q:4 Stack trace: #0 {main} thrown in /in/JfD5Q on line 4
Process exited with code 255.

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