error: the constant `N` is not of type `usize` --> $DIR/bad-const-wf-doesnt-specialize.rs:8:29 | LL | impl Copy for S {} | ^^^^ expected `usize`, found `i32` | note: required by a bound in `S` --> $DIR/bad-const-wf-doesnt-specialize.rs:6:10 | LL | struct S; | ^^^^^^^^^^^^^^ required by this bound in `S` error: aborting due to previous error