| error: const `impl` for trait `Debug` which is not `const` | |
| --> $DIR/rustc-impl-const-stability.rs:15:12 | |
| | | |
| LL | impl const std::fmt::Debug for Data { | |
| | ^^^^^^^^^^^^^^^ 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: aborting due to 1 previous error | |