error[E0405]: cannot find trait `MyTrait` in the crate root --> $DIR/issue-100199.rs:1:1 | LL | #[issue_100199::struct_with_bound] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ not found in the crate root | = note: this error originates in the attribute macro `issue_100199::struct_with_bound` (in Nightly builds, run with -Z macro-backtrace for more info) help: consider importing this trait | LL + use traits::MyTrait; | error: aborting due to previous error For more information about this error, try `rustc --explain E0405`.