| error: const `impl` for trait `A` which is not `const` | |
| --> $DIR/const-impl-requires-const-trait.rs:6:12 | |
| | | |
| LL | impl const A for () {} | |
| | ^ 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 | |
| help: mark `A` as `const` to allow it to have `const` implementations | |
| | | |
| LL | #[const_trait] pub trait A {} | |
| | ++++++++++++++ | |
| error: aborting due to 1 previous error | |