| error[E0658]: use of unstable library feature `derive_const` |
| --> $DIR/derive-const-gate.rs:1:3 |
| | |
| LL | #[derive_const(Debug)] |
| | ^^^^^^^^^^^^ |
| | |
| = note: see issue #118304 <https://github.com/rust-lang/rust/issues/118304> for more information |
| = 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| = note: this compiler was built on YYYY-MM-DD; consider upgrading it if it is out of date |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: const `impl` for trait `Debug` which is not `const` |
| --> $DIR/derive-const-gate.rs:1:16 |
| | |
| LL | #[derive_const(Debug)] |
| | ^^^^^ this trait is not `const` |
| | |
| = note: marking a trait with `const` ensures all default method bodies are `const` |
| = note: adding a non-const method body in the future would be a breaking change |
| |
| error[E0015]: cannot call non-const method `Formatter::<'_>::write_str` in constant functions |
| --> $DIR/derive-const-gate.rs:1:16 |
| | |
| LL | #[derive_const(Debug)] |
| | ^^^^^ |
| | |
| = note: calls in constant functions are limited to constant functions, tuple structs and tuple variants |
| |
| error: aborting due to 3 previous errors |
| |
| Some errors have detailed explanations: E0015, E0658. |
| For more information about an error, try `rustc --explain E0015`. |
