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<?php $func = function (callback $a) { $a(); }; $a = function () { echo 'Hello World'; }; $func($a);
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: {closure}(): Argument #1 ($a) must be of type callback, Closure given, called in /in/8aUji on line 10 and defined in /in/8aUji:2 Stack trace: #0 /in/8aUji(10): {closure}(Object(Closure)) #1 {main} thrown in /in/8aUji on line 2
Process exited with code 255.

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