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<?php $f = function($fun, $x) { return $fun($x*$x); }; $f($f,1);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught ArgumentCountError: Too few arguments to function {closure}(), 1 passed in /in/sLW8o on line 3 and exactly 2 expected in /in/sLW8o:3 Stack trace: #0 /in/sLW8o(3): {closure}(1) #1 /in/sLW8o(4): {closure}(Object(Closure), 1) #2 {main} thrown in /in/sLW8o on line 3
Process exited with code 255.

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