tests/ui/traits/duplicate-methods.rs - toolchain/rustc - Git at Google

 trait Foo {
     fn orange(&self);
     fn orange(&self); //~ ERROR the name `orange` is defined multiple times
 }

 fn main() {}
	trait Foo {
	fn orange(&self);
	fn orange(&self); //~ ERROR the name `orange` is defined multiple times
	}

	fn main() {}