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<?php $fn = function() { throw new Exception('test'); }; try { $fn(); } catch (Exception $e) { foreach ($e->getTrace() as $frame) { $r = new ReflectionFunction($frame['function']); echo($r->isClosure()); } }
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught ReflectionException: Function {closure}() does not exist in /in/VJmLA:9 Stack trace: #0 /in/VJmLA(9): ReflectionFunction->__construct('{closure}') #1 {main} thrown in /in/VJmLA on line 9
Process exited with code 255.

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