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<?php abstract class A { abstract public function test(A $foo): self; } class B extends A { public function test(A $foo): self { return $this; } } $foo = new B(); var_dump($foo, $foo->test($foo));
Output for git.master_jit, git.master, rfc.property-hooks
object(B)#1 (0) { } object(B)#1 (0) { }

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