error[E0277]: `{closure@$DIR/use-parentheses-to-call-closure-issue-145404.rs:12:12: 12:14}` doesn't implement `std::fmt::Display`
  --> $DIR/use-parentheses-to-call-closure-issue-145404.rs:12:12
   |
LL |     S.call(|| "hello");
   |       ---- ^^^^^^^^^^ unsatisfied trait bound
   |       |
   |       required by a bound introduced by this call
   |
   = help: the trait `std::fmt::Display` is not implemented for closure `{closure@$DIR/use-parentheses-to-call-closure-issue-145404.rs:12:12: 12:14}`
note: required by a bound in `S::call`
  --> $DIR/use-parentheses-to-call-closure-issue-145404.rs:8:28
   |
LL |     fn call(&self, _: impl Display) {}
   |                            ^^^^^^^ required by this bound in `S::call`
help: use parentheses to call this closure
   |
LL -     S.call(|| "hello");
LL +     S.call((|| "hello")());
   |

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0277`.