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<?php var_dump(array_map(function($x, $y) { return $x.$y; }, array(2=>'2', 1=>'1')));
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught ArgumentCountError: Too few arguments to function {closure}(), 1 passed and exactly 2 expected in /in/QvORN:3 Stack trace: #0 [internal function]: {closure}('2') #1 /in/QvORN(3): array_map(Object(Closure), Array) #2 {main} thrown in /in/QvORN on line 3
Process exited with code 255.

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