error: cannot use a derive helper attribute through an import
  --> $DIR/derive-helper-shadowing.rs:40:15
   |
LL |             #[renamed]
   |               ^^^^^^^
   |
note: the derive helper attribute imported here
  --> $DIR/derive-helper-shadowing.rs:39:17
   |
LL |             use empty_helper as renamed;
   |                 ^^^^^^^^^^^^^^^^^^^^^^^

error: cannot find attribute `empty_helper` in this scope
  --> $DIR/derive-helper-shadowing.rs:36:22
   |
LL |             #[derive(GenHelperUse)]
   |                      ^^^^^^^^^^^^
   |
   = note: this error originates in a derive macro (in Nightly builds, run with -Z macro-backtrace for more info)

error: cannot find attribute `empty_helper` in this scope
  --> $DIR/derive-helper-shadowing.rs:14:11
   |
LL |         #[empty_helper]
   |           ^^^^^^^^^^^^
...
LL |             gen_helper_use!();
   |             ------------------ in this macro invocation
   |
   = note: this error originates in a macro (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0659]: `empty_helper` is ambiguous (name vs any other name during import resolution)
  --> $DIR/derive-helper-shadowing.rs:24:13
   |
LL |         use empty_helper;
   |             ^^^^^^^^^^^^ ambiguous name
   |
note: `empty_helper` could refer to the derive helper attribute defined here
  --> $DIR/derive-helper-shadowing.rs:20:10
   |
LL | #[derive(Empty)]
   |          ^^^^^
note: `empty_helper` could also refer to the attribute macro imported here
  --> $DIR/derive-helper-shadowing.rs:10:5
   |
LL | use test_macros::empty_attr as empty_helper;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   = help: use `crate::empty_helper` to refer to this attribute macro unambiguously

error[E0659]: `empty_helper` is ambiguous (derive helper attribute vs any other name)
  --> $DIR/derive-helper-shadowing.rs:19:3
   |
LL | #[empty_helper]
   |   ^^^^^^^^^^^^ ambiguous name
   |
note: `empty_helper` could refer to the derive helper attribute defined here
  --> $DIR/derive-helper-shadowing.rs:20:10
   |
LL | #[derive(Empty)]
   |          ^^^^^
note: `empty_helper` could also refer to the attribute macro imported here
  --> $DIR/derive-helper-shadowing.rs:10:5
   |
LL | use test_macros::empty_attr as empty_helper;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   = help: use `crate::empty_helper` to refer to this attribute macro unambiguously

error: aborting due to 5 previous errors

For more information about this error, try `rustc --explain E0659`.