1 error: `macro_use` attributes are no longer needed in the Rust 2018 edition
2 --> $DIR/macro_use_imports.rs:5:1
5 | ^^^^^^^^^^^^ help: remove the attribute and import the macro directly, try: `use std::prelude::<macro name>`
7 = note: `-D clippy::macro-use-imports` implied by `-D warnings`
9 error: aborting due to previous error