error: associated constant `UNUSED_CONST` is never used
  --> $DIR/unused-assoc-const.rs:4:11
   |
LL | trait Trait {
   |       ----- associated constant in this trait
LL |     const UNUSED_CONST: i32;
   |           ^^^^^^^^^^^^
   |
note: the lint level is defined here
  --> $DIR/unused-assoc-const.rs:1:9
   |
LL | #![deny(dead_code)]
   |         ^^^^^^^^^

error: aborting due to 1 previous error