#![crate_type = "lib"] #[derive(PartialEq, Eq)] // ensure deriving `Eq` does not enable `feature(no_coverage)` struct Foo { a: u8, b: u32, } #[no_coverage] //~ ERROR the `#[no_coverage]` attribute is an experimental feature fn requires_feature_no_coverage() -> bool { let bar = Foo { a: 0, b: 0 }; bar == Foo { a: 0, b: 0 } }