error: const `impl` for trait `Add` which is not marked with `#[const_trait]` --> $DIR/generic-bound.rs:16:15 | LL | impl const std::ops::Add for S { | ^^^^^^^^^^^^^ | = note: marking a trait with `#[const_trait]` 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 previous error