error: the `#[test]` attribute may only be used on a non-associated function --> $DIR/issue-109816.rs:4:5 | LL | #[test] | ^^^^^^^ the `#[test]` macro causes a function to be run as a test and has no effect on non-functions LL | LL | struct A5(u32, u8); | ------------------- expected a non-associated function, found a struct | help: replace with conditional compilation to make the item only exist when tests are being run | LL | #[cfg(test)] | error: aborting due to 1 previous error