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<?php function reduce(int $a, int $b, callable $reducer) : int { return $reducer($a, $b); } reduce(1, 2, function($a, $b, $c) { return $a + $b + 'c'; });
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught ArgumentCountError: Too few arguments to function {closure}(), 2 passed in /in/va0jA on line 4 and exactly 3 expected in /in/va0jA:7 Stack trace: #0 /in/va0jA(4): {closure}(1, 2) #1 /in/va0jA(7): reduce(1, 2, Object(Closure)) #2 {main} thrown in /in/va0jA on line 7
Process exited with code 255.

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