error[E0326]: implemented const `CONST` has an incompatible type for trait
  --> $DIR/issue-41549.rs:9:18
   |
LL |     const CONST: () = ();
   |                  ^^ expected u32, found ()
   |
   = note: expected type `u32`
              found type `()`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0326`.