error: precise capturing lists may not be parenthesized
  --> $DIR/parenthesized.rs:4:24
   |
LL | fn f() -> impl Sized + (use<>) {}
   |                        ^^^^^^^
   |
help: remove the parentheses
   |
LL - fn f() -> impl Sized + (use<>) {}
LL + fn f() -> impl Sized + use<> {}
   |

error: aborting due to 1 previous error