src/test/ui/function-pointer/unsized-ret.stderr

   1 error[E0277]: the size for values of type `str` cannot be known at compilation time
   2   --> $DIR/unsized-ret.rs:10:27
   3    |
   4 LL |     foo::<fn() -> str, _>(None, ());
   5    |     --------------------- ^^^^ doesn't have a size known at compile-time
   6    |     |
   7    |     required by a bound introduced by this call
   8    |
   9    = help: within `fn() -> str`, the trait `Sized` is not implemented for `str`
  10    = note: required because it appears within the type `fn() -> str`
  11 note: required by a bound in `foo`
  12   --> $DIR/unsized-ret.rs:5:11
  13    |
  14 LL | fn foo<F: Fn<T>, T:std::marker::Tuple>(f: Option<F>, t: T) {
  15    |           ^^^^^ required by this bound in `foo`
  16
  17 error[E0277]: the size for values of type `(dyn std::fmt::Display + 'a)` cannot be known at compilation time
  18   --> $DIR/unsized-ret.rs:13:66
  19    |
  20 LL |     foo::<for<'a> fn(&'a ()) -> (dyn std::fmt::Display + 'a), _>(None, (&(),));
  21    |     ------------------------------------------------------------ ^^^^ doesn't have a size known at compile-time
  22    |     |
  23    |     required by a bound introduced by this call
  24    |
  25    = help: within `for<'a> fn(&'a ()) -> (dyn std::fmt::Display + 'a)`, the trait `for<'a> Sized` is not implemented for `(dyn std::fmt::Display + 'a)`
  26    = note: required because it appears within the type `for<'a> fn(&'a ()) -> (dyn std::fmt::Display + 'a)`
  27 note: required by a bound in `foo`
  28   --> $DIR/unsized-ret.rs:5:11
  29    |
  30 LL | fn foo<F: Fn<T>, T:std::marker::Tuple>(f: Option<F>, t: T) {
  31    |           ^^^^^ required by this bound in `foo`
  32
  33 error: aborting due to 2 previous errors
  34
  35 For more information about this error, try `rustc --explain E0277`.