rust/tests/ui/feature-gates/feature-gate-rustc-attrs-1.stderr

error[E0658]: the `#[rustc_variance]` attribute is just used for rustc unit tests and will never be stable
  --> $DIR/feature-gate-rustc-attrs-1.rs:3:1
   |
LL | #[rustc_variance]
   | ^^^^^^^^^^^^^^^^^
   |
   = help: add `#![feature(rustc_attrs)]` to the crate attributes to enable
   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date

error[E0658]: the `#[rustc_nonnull_optimization_guaranteed]` attribute is just used to document guaranteed niche optimizations in libcore and libstd and will never be stable
              (note that the compiler does not even check whether the type indeed is being non-null-optimized; it is your responsibility to ensure that the attribute is only used on types that are optimized)
  --> $DIR/feature-gate-rustc-attrs-1.rs:4:1
   |
LL | #[rustc_nonnull_optimization_guaranteed]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = help: add `#![feature(rustc_attrs)]` to the crate attributes to enable
   = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0658`.
Tweak unstable diagnostic output 2019-04-10 16:40:12 -07:00			error[E0658]: the `#[rustc_variance]` attribute is just used for rustc unit tests and will never be stable
Remove redundant `ignore-tidy-linelength` annotations This is step 2 towards fixing #77548. In the codegen and codegen-units test suites, the `//` comment markers were kept in order not to affect any source locations. This is because these tests cannot be automatically `--bless`ed. 2021-04-03 13:05:11 +02:00			`--> $DIR/feature-gate-rustc-attrs-1.rs:3:1`
Feature gate arbitrary tokens in non-macro attributes with a separate gate Feature gate `rustc_` and `derive_` with their own gates again instead of `custom_attribute` 2018-08-11 16:40:08 +03:00			`\|`
Update tests 2019-03-09 15:03:44 +03:00			`LL \| #[rustc_variance]`
Feature gate arbitrary tokens in non-macro attributes with a separate gate Feature gate `rustc_` and `derive_` with their own gates again instead of `custom_attribute` 2018-08-11 16:40:08 +03:00			`\| ^^^^^^^^^^^^^^^^^`
			`\|`
normalize use of backticks in compiler messages for libsyntax/feature_gate https://github.com/rust-lang/rust/issues/60532 2019-07-09 11:32:08 +02:00			= help: add `#![feature(rustc_attrs)]` to the crate attributes to enable
Bless tests Update tests 2024-01-10 01:39:02 -05:00			`= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date`
Feature gate arbitrary tokens in non-macro attributes with a separate gate Feature gate `rustc_` and `derive_` with their own gates again instead of `custom_attribute` 2018-08-11 16:40:08 +03:00
fix rustc_nonnull_optimization_guaranteed docs 2024-09-22 08:11:17 +02:00			error[E0658]: the `#[rustc_nonnull_optimization_guaranteed]` attribute is just used to document guaranteed niche optimizations in libcore and libstd and will never be stable
			`(note that the compiler does not even check whether the type indeed is being non-null-optimized; it is your responsibility to ensure that the attribute is only used on types that are optimized)`
Remove attribute `#[rustc_error]` 2025-03-30 00:39:55 +03:00			`--> $DIR/feature-gate-rustc-attrs-1.rs:4:1`
Allow null-pointer-optimized enums in FFI if their underlying representation is FFI safe This allows types like Option<NonZeroU8> to be used in FFI without triggering the improper_ctypes lint. This works by changing the is_repr_nullable_ptr function to consider an enum E to be FFI-safe if: - E has no explicit #[repr(...)]. - It only has two variants. - One of those variants is empty (meaning it has no fields). - The other variant has only one field. - That field is one of the following: - &T - &mut T - extern "C" fn - core::num::NonZero* - core::ptr::NonNull<T> - #[repr(transparent)] struct wrapper around one of the types in this list. - The size of E and its field are both known and are both the same size (implying E is participating in the nonnull optimization). 2019-05-22 06:49:43 -07:00			`\|`
			`LL \| #[rustc_nonnull_optimization_guaranteed]`
			`\| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^`
			`\|`
normalize use of backticks in compiler messages for libsyntax/feature_gate https://github.com/rust-lang/rust/issues/60532 2019-07-09 11:32:08 +02:00			= help: add `#![feature(rustc_attrs)]` to the crate attributes to enable
Bless tests Update tests 2024-01-10 01:39:02 -05:00			`= note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date`
Allow null-pointer-optimized enums in FFI if their underlying representation is FFI safe This allows types like Option<NonZeroU8> to be used in FFI without triggering the improper_ctypes lint. This works by changing the is_repr_nullable_ptr function to consider an enum E to be FFI-safe if: - E has no explicit #[repr(...)]. - It only has two variants. - One of those variants is empty (meaning it has no fields). - The other variant has only one field. - That field is one of the following: - &T - &mut T - extern "C" fn - core::num::NonZero* - core::ptr::NonNull<T> - #[repr(transparent)] struct wrapper around one of the types in this list. - The size of E and its field are both known and are both the same size (implying E is participating in the nonnull optimization). 2019-05-22 06:49:43 -07:00
Remove attribute `#[rustc_error]` 2025-03-30 00:39:55 +03:00			`error: aborting due to 2 previous errors`
Feature gate arbitrary tokens in non-macro attributes with a separate gate Feature gate `rustc_` and `derive_` with their own gates again instead of `custom_attribute` 2018-08-11 16:40:08 +03:00
Fix tests 2019-01-28 22:28:44 +01:00			For more information about this error, try `rustc --explain E0658`.