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<?php $foo = []; //$foo['bar'] = 1; var_dump([$foo['bar'] ?? void]);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught Error: Undefined constant "void" in /in/nAEc2:6 Stack trace: #0 {main} thrown in /in/nAEc2 on line 6
Process exited with code 255.

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