rust/tests/ui/feature-gates/feature-gate-rustc-allow-const-fn-unstable.stderr

error[E0658]: rustc_allow_const_fn_unstable side-steps feature gating and stability checks
  --> $DIR/feature-gate-rustc-allow-const-fn-unstable.rs:3:1
   |
LL | #[rustc_allow_const_fn_unstable()]
   | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: see issue #69399 <https://github.com/rust-lang/rust/issues/69399> for more information
   = help: add `#![feature(rustc_allow_const_fn_unstable)]` to the crate attributes to enable

error: aborting due to previous error

For more information about this error, try `rustc --explain E0658`.
add rustc_allow_const_fn_unstable attribute allow_internal_unstable is currently used to side-step feature gate and stability checks. While it was originally only meant to be used only on macros, its use was expanded to const functions. This commit prepares stricter checks for the usage of allow_internal_unstable (only on macros) and introduces the rustc_allow_const_fn_unstable attribute for usage on functions. See rust-lang/rust#69399 2020-10-21 10:36:07 +00:00			`error[E0658]: rustc_allow_const_fn_unstable side-steps feature gating and stability checks`
			`--> $DIR/feature-gate-rustc-allow-const-fn-unstable.rs:3:1`
			`\|`
			`LL \| #[rustc_allow_const_fn_unstable()]`
			`\| ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^`
			`\|`
			`= note: see issue #69399 <https://github.com/rust-lang/rust/issues/69399> for more information`
			= help: add `#![feature(rustc_allow_const_fn_unstable)]` to the crate attributes to enable

			`error: aborting due to previous error`

			For more information about this error, try `rustc --explain E0658`.