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<?php interface A { function x(self $o); } class B implements A { function x(self $o) { return $o; } } class C extends B { } $c = new C(); var_dump($c->x($c));
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Declaration of B::x(B $o) must be compatible with A::x(A $o) in /in/FU3BJ on line 8
Process exited with code 255.

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