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<?php $x = new __PHP_Incomplete_Class(); var_dump(is_object($x)); class Foo extends __PHP_Incomplete_Class { } $y = new Foo(); var_dump(is_object($y));
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Class Foo cannot extend final class __PHP_Incomplete_Class in /in/amqBC on line 6
Process exited with code 255.

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