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@ 2016-01-12T17:50:06Z

<?php

function fn() {
    throw new Exception('test');
}

try {
    $fn = function() { fn(); };
    $fn();
} catch (Exception $e) {
    foreach ($e->getTrace() as $frame) {
        $r = new ReflectionFunction($frame['function']);
        echo($r->isClosure());
    }
}

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This is an error 404