error[E0277]: the size for values of type `X` cannot be known at compilation time
  --> $DIR/unsized3.rs:7:13
   |
LL | fn f1<X: ?Sized>(x: &X) {
   |       - this type parameter needs to be `std::marker::Sized`
LL |     f2::<X>(x);
   |             ^ doesn't have a size known at compile-time
...
LL | fn f2<X>(x: &X) {
   |       - required by this bound in `f2`
   |
   = help: the trait `std::marker::Sized` is not implemented for `X`
   = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
help: consider relaxing the implicit `Sized` restriction
   |
LL | fn f2<X: ?Sized>(x: &X) {
   |        ^^^^^^^^

error[E0277]: the size for values of type `X` cannot be known at compilation time
  --> $DIR/unsized3.rs:18:13
   |
LL | fn f3<X: ?Sized + T>(x: &X) {
   |       - this type parameter needs to be `std::marker::Sized`
LL |     f4::<X>(x);
   |             ^ doesn't have a size known at compile-time
...
LL | fn f4<X: T>(x: &X) {
   |       - required by this bound in `f4`
   |
   = help: the trait `std::marker::Sized` is not implemented for `X`
   = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
help: consider relaxing the implicit `Sized` restriction
   |
LL | fn f4<X: T + ?Sized>(x: &X) {
   |            ^^^^^^^^

error[E0277]: the size for values of type `X` cannot be known at compilation time
  --> $DIR/unsized3.rs:33:8
   |
LL | fn f5<Y>(x: &Y) {}
   |       - required by this bound in `f5`
...
LL | fn f8<X: ?Sized>(x1: &S<X>, x2: &S<X>) {
   |       - this type parameter needs to be `std::marker::Sized`
LL |     f5(x1);
   |        ^^ doesn't have a size known at compile-time
   |
   = help: within `S<X>`, the trait `std::marker::Sized` is not implemented for `X`
   = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
   = note: required because it appears within the type `S<X>`
help: consider relaxing the implicit `Sized` restriction
   |
LL | fn f5<Y: ?Sized>(x: &Y) {}
   |        ^^^^^^^^

error[E0277]: the size for values of type `X` cannot be known at compilation time
  --> $DIR/unsized3.rs:40:8
   |
LL | fn f9<X: ?Sized>(x1: Box<S<X>>) {
   |       - this type parameter needs to be `std::marker::Sized`
LL |     f5(&(*x1, 34));
   |        ^^^^^^^^^^ doesn't have a size known at compile-time
   |
   = help: within `S<X>`, the trait `std::marker::Sized` is not implemented for `X`
   = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
   = note: required because it appears within the type `S<X>`
   = note: only the last element of a tuple may have a dynamically sized type

error[E0277]: the size for values of type `X` cannot be known at compilation time
  --> $DIR/unsized3.rs:45:9
   |
LL | fn f10<X: ?Sized>(x1: Box<S<X>>) {
   |        - this type parameter needs to be `std::marker::Sized`
LL |     f5(&(32, *x1));
   |         ^^^^^^^^^ doesn't have a size known at compile-time
   |
   = help: within `({integer}, S<X>)`, the trait `std::marker::Sized` is not implemented for `X`
   = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
   = note: required because it appears within the type `S<X>`
   = note: required because it appears within the type `({integer}, S<X>)`
   = note: tuples must have a statically known size to be initialized

error[E0277]: the size for values of type `X` cannot be known at compilation time
  --> $DIR/unsized3.rs:45:8
   |
LL | fn f5<Y>(x: &Y) {}
   |       - required by this bound in `f5`
...
LL | fn f10<X: ?Sized>(x1: Box<S<X>>) {
   |        - this type parameter needs to be `std::marker::Sized`
LL |     f5(&(32, *x1));
   |        ^^^^^^^^^^ doesn't have a size known at compile-time
   |
   = help: within `({integer}, S<X>)`, the trait `std::marker::Sized` is not implemented for `X`
   = note: to learn more, visit <https://doc.rust-lang.org/book/ch19-04-advanced-types.html#dynamically-sized-types-and-the-sized-trait>
   = note: required because it appears within the type `S<X>`
   = note: required because it appears within the type `({integer}, S<X>)`
help: consider relaxing the implicit `Sized` restriction
   |
LL | fn f5<Y: ?Sized>(x: &Y) {}
   |        ^^^^^^^^

error: aborting due to 6 previous errors

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