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<?php $input = array('RI' => 123); var_dump(array_map(function($value, $index) { return array('PROD' => $index);}, $input));
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/9VVkp:5 Stack trace: #0 [internal function]: {closure}(123) #1 /in/9VVkp(5): array_map(Object(Closure), Array) #2 {main} thrown in /in/9VVkp on line 5
Process exited with code 255.

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