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<?php class A { final protected function __clone() { throw new Exception("No cloning!"); } } class B extends A { // this should probably not be legal function copy() { return clone $this; } } var_dump((new B)->copy());
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.33, 8.2.0 - 8.2.29, 8.3.0 - 8.3.25, 8.4.1 - 8.4.12
Fatal error: Uncaught Exception: No cloning! in /in/U1LMQ:6 Stack trace: #0 /in/U1LMQ(13): A->__clone() #1 /in/U1LMQ(16): B->copy() #2 {main} thrown in /in/U1LMQ on line 6
Process exited with code 255.

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