error[E0277]: the size for values of type `str` cannot be known at compilation time
  --> $DIR/issue-85945-check-where-clause-before-suggesting-unsized.rs:4:16
   |
LL | fn bar() { foo(""); }
   |            --- ^^ doesn't have a size known at compile-time
   |            |
   |            required by a bound introduced by this call
   |
   = help: the trait `Sized` is not implemented for `str`
note: required by a bound in `foo`
  --> $DIR/issue-85945-check-where-clause-before-suggesting-unsized.rs:3:8
   |
LL | fn foo<T>(_: &T) where T: Sized {}
   |        ^ required by this bound in `foo`

error: aborting due to 1 previous error

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