error: const `impl` for trait `Drop` which is not marked with `#[const_trait]` --> $DIR/const-drop-fail.rs:19:12 | LL | impl const Drop for ConstImplWithDropGlue { | ^^^^ | = 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: `~const` can only be applied to `#[const_trait]` traits --> $DIR/const-drop-fail.rs:23:26 | LL | const fn check(_: T) {} | ^^^^^^^^ error[E0493]: destructor of `T` cannot be evaluated at compile-time --> $DIR/const-drop-fail.rs:23:36 | LL | const fn check(_: T) {} | ^ - value is dropped here | | | the destructor for this type cannot be evaluated in constant functions error: aborting due to 3 previous errors For more information about this error, try `rustc --explain E0493`.