error[E0573]: expected type, found constant `X`
  --> $DIR/issue-18119.rs:5:6
   |
LL | impl X {}
   |      ^ not a type

error[E0573]: expected type, found static `Y`
  --> $DIR/issue-18119.rs:7:6
   |
LL | impl Y {}
   |      ^ not a type

error[E0573]: expected type, found function `foo`
  --> $DIR/issue-18119.rs:9:6
   |
LL | impl foo {}
   |      ^^^ not a type

error: aborting due to 3 previous errors