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<?php $f = function ($g) use ($f) { return $g($f); }; $f($f);
Output for git.master, git.master_jit, rfc.property-hooks
Warning: Undefined variable $f in /in/W7utN on line 3 Fatal error: Uncaught Error: Value of type null is not callable in /in/W7utN:3 Stack trace: #0 /in/W7utN(3): {closure}(NULL) #1 /in/W7utN(4): {closure}(Object(Closure)) #2 {main} thrown in /in/W7utN on line 3
Process exited with code 255.

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