rust/tests/ui/proc-macro/derive-helper-shadowing.stderr

error: cannot use a derive helper attribute through an import
  --> $DIR/derive-helper-shadowing.rs:43:15
   |
LL |             #[renamed]
   |               ^^^^^^^
   |
note: the derive helper attribute imported here
  --> $DIR/derive-helper-shadowing.rs:42:17
   |
LL |             use empty_helper as renamed;
   |                 ^^^^^^^^^^^^^^^^^^^^^^^

error: cannot find attribute `empty_helper` in this scope
  --> $DIR/derive-helper-shadowing.rs:39:22
   |
LL |             #[derive(GenHelperUse)]
   |                      ^^^^^^^^^^^^
   |
   = note: `empty_helper` is an attribute that can be used by the derive macro `Empty`, you might be missing a `derive` attribute
   = note: this error originates in the derive macro `GenHelperUse` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider importing this attribute macro through its public re-export
   |
LL +             use empty_helper;
   |

error: cannot find attribute `empty_helper` in this scope
  --> $DIR/derive-helper-shadowing.rs:15:11
   |
LL |         #[empty_helper]
   |           ^^^^^^^^^^^^
...
LL |             gen_helper_use!();
   |             ----------------- in this macro invocation
   |
   = note: `empty_helper` is an attribute that can be used by the derive macro `Empty`, you might be missing a `derive` attribute
   = note: this error originates in the macro `gen_helper_use` (in Nightly builds, run with -Z macro-backtrace for more info)
help: consider importing this attribute macro through its public re-export
   |
LL +             use crate::empty_helper;
   |

error[E0659]: `empty_helper` is ambiguous
  --> $DIR/derive-helper-shadowing.rs:20:3
   |
LL | #[empty_helper]
   |   ^^^^^^^^^^^^ ambiguous name
   |
   = note: ambiguous because of a name conflict with a derive helper attribute
note: `empty_helper` could refer to the derive helper attribute defined here
  --> $DIR/derive-helper-shadowing.rs:23:10
   |
LL | #[derive(Empty)]
   |          ^^^^^
note: `empty_helper` could also refer to the attribute macro imported here
  --> $DIR/derive-helper-shadowing.rs:11:5
   |
LL | use test_macros::empty_attr as empty_helper;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   = help: use `crate::empty_helper` to refer to this attribute macro unambiguously

error: derive helper attribute is used before it is introduced
  --> $DIR/derive-helper-shadowing.rs:20:3
   |
LL | #[empty_helper]
   |   ^^^^^^^^^^^^
...
LL | #[derive(Empty)]
   |          ----- the attribute is introduced here
   |
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
   = note: `#[deny(legacy_derive_helpers)]` (part of `#[deny(future_incompatible)]`) on by default

error: aborting due to 5 previous errors

For more information about this error, try `rustc --explain E0659`.
Future incompatibility report: Future breakage diagnostic:
error: derive helper attribute is used before it is introduced
  --> $DIR/derive-helper-shadowing.rs:20:3
   |
LL | #[empty_helper]
   |   ^^^^^^^^^^^^
...
LL | #[derive(Empty)]
   |          ----- the attribute is introduced here
   |
   = warning: this was previously accepted by the compiler but is being phased out; it will become a hard error in a future release!
   = note: for more information, see issue #79202 <https://github.com/rust-lang/rust/issues/79202>
   = note: `#[deny(legacy_derive_helpers)]` (part of `#[deny(future_incompatible)]`) on by default