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<?php class A { protected $a; public function foo() { strtolower( function () { set_error_handler(function() {}); $class = get_called_class(); restore_error_handler(); return $class; }); $f = function() { }; $f(); } } $a = new A; $a->foo();
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Uncaught TypeError: strtolower(): Argument #1 ($string) must be of type string, Closure given in /in/KCfKL:5 Stack trace: #0 /in/KCfKL(5): strtolower(Object(Closure)) #1 /in/KCfKL(22): A->foo() #2 {main} thrown in /in/KCfKL on line 5
Process exited with code 255.

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