error: `macro_use` attributes are no longer needed in the Rust 2018 edition
  --> tests/ui/macro_use_imports.rs:18:5
   |
LL |     #[macro_use]
   |     ^^^^^^^^^^^^ help: remove the attribute and import the macro directly, try: `use mac::{pub_macro, inner_mod_macro, function_macro, ty_macro, pub_in_private_macro};`
   |
   = note: `-D clippy::macro-use-imports` implied by `-D warnings`
   = help: to override `-D warnings` add `#[allow(clippy::macro_use_imports)]`

error: `macro_use` attributes are no longer needed in the Rust 2018 edition
  --> tests/ui/macro_use_imports.rs:22:5
   |
LL |     #[macro_use]
   |     ^^^^^^^^^^^^ help: remove the attribute and import the macro directly, try: `use mac::{inner::mut_mut, inner::try_err};`

error: `macro_use` attributes are no longer needed in the Rust 2018 edition
  --> tests/ui/macro_use_imports.rs:24:5
   |
LL |     #[macro_use]
   |     ^^^^^^^^^^^^ help: remove the attribute and import the macro directly, try: `use mac::inner::nested::string_add;`

error: `macro_use` attributes are no longer needed in the Rust 2018 edition
  --> tests/ui/macro_use_imports.rs:20:5
   |
LL |     #[macro_use]
   |     ^^^^^^^^^^^^ help: remove the attribute and import the macro directly, try: `use mini_mac::ClippyMiniMacroTest;`

error: aborting due to 4 previous errors