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<?php interface foo { public function getThing() : \Traversable; } class mything implements foo { public function getThing() { return new \ArrayIterator([]); } } $xxx = new mything;
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Declaration of mything::getThing() must be compatible with foo::getThing(): Traversable in /in/CmGe3 on line 9
Process exited with code 255.

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