error: higher-ranked subtype error
  --> $DIR/issue-57611-trait-alias.rs:21:9
   |
LL |         |x| x
   |         ^^^^^

error: higher-ranked subtype error
  --> $DIR/issue-57611-trait-alias.rs:21:9
   |
LL |         |x| x
   |         ^^^^^

error: aborting due to 2 previous errors