#![crate_type = "lib"] #![feature(no_coverage)] //~ ERROR feature has been removed [E0557] #[derive(PartialEq, Eq)] // ensure deriving `Eq` does not enable `feature(coverage)` struct Foo { a: u8, b: u32, } #[coverage(off)] //~ ERROR the `#[coverage]` attribute is an experimental feature fn requires_feature_coverage() -> bool { let bar = Foo { a: 0, b: 0 }; bar == Foo { a: 0, b: 0 } }