| error[E0658]: use of unstable library feature 'derive_const' | |
| --> $DIR/derive-const-gate.rs:1:3 | |
| | | |
| LL | #[derive_const(Default)] | |
| | ^^^^^^^^^^^^ | |
| | | |
| = help: add `#![feature(derive_const)]` 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| = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date | |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 1 previous error | |
| For more information about this error, try `rustc --explain E0658`. |