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<?php interface foo { function foo($x, $y = NULL); } class bar implements foo { function foo($x) {} }
Output for git.master, git.master_jit, rfc.property-hooks
Fatal error: Declaration of bar::foo($x) must be compatible with foo::foo($x, $y = null) in /in/vbC21 on line 7
Process exited with code 255.

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