error[E0277]: the size for values of type `[u8]` cannot be known at compilation time
  --> $DIR/issue-85943-no-suggest-unsized-indirection-in-where-clause.rs:5:10
   |
LL | struct B(A<[u8]>);
   |          ^^^^^^^ doesn't have a size known at compile-time
   |
   = help: the trait `Sized` is not implemented for `[u8]`
note: required by a bound in `A`
  --> $DIR/issue-85943-no-suggest-unsized-indirection-in-where-clause.rs:4:10
   |
LL | struct A<T>(T) where T: Send;
   |          ^ required by this bound in `A`
help: you could relax the implicit `Sized` bound on `T` if it were used through indirection like `&T` or `Box<T>`
  --> $DIR/issue-85943-no-suggest-unsized-indirection-in-where-clause.rs:4:10
   |
LL | struct A<T>(T) where T: Send;
   |          ^  - ...if indirection were used here: `Box<T>`
   |          |
   |          this could be changed to `T: ?Sized`...

error: aborting due to previous error

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