error: `?Trait` bounds are only permitted at the point where a type parameter is declared
  --> $DIR/maybe-bounds-where.rs:1:23
   |
LL | struct S1<T>(T) where (T): ?Sized;
   |                       ^^^

error: `?Trait` bounds are only permitted at the point where a type parameter is declared
  --> $DIR/maybe-bounds-where.rs:4:23
   |
LL | struct S2<T>(T) where u8: ?Sized;
   |                       ^^

error: `?Trait` bounds are only permitted at the point where a type parameter is declared
  --> $DIR/maybe-bounds-where.rs:7:23
   |
LL | struct S3<T>(T) where &'static T: ?Sized;
   |                       ^^^^^^^^^^

error: `?Trait` bounds are only permitted at the point where a type parameter is declared
  --> $DIR/maybe-bounds-where.rs:12:31
   |
LL | struct S4<T>(T) where for<'a> T: ?Trait<'a>;
   |                               ^

error: `?Trait` bounds are only permitted at the point where a type parameter is declared
  --> $DIR/maybe-bounds-where.rs:20:18
   |
LL |     fn f() where T: ?Sized {}
   |                  ^

error[E0203]: type parameter has more than one relaxed default bound, only one is supported
  --> $DIR/maybe-bounds-where.rs:15:11
   |
LL | struct S5<T>(*const T) where T: ?Trait<'static> + ?Sized;
   |           ^

warning: default bound relaxed for a type parameter, but this does nothing because the given bound is not a default; only `?Sized` is supported
  --> $DIR/maybe-bounds-where.rs:15:11
   |
LL | struct S5<T>(*const T) where T: ?Trait<'static> + ?Sized;
   |           ^

error: aborting due to 6 previous errors; 1 warning emitted

For more information about this error, try `rustc --explain E0203`.