error[E0277]: the size for values of type `(dyn Debug + 'static)` cannot be known at compilation time
  --> $DIR/unsizing-wfcheck-issue-126272.rs:12:13
   |
LL |     nested: &'static Bar<dyn std::fmt::Debug>,
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
   |
   = help: the trait `Sized` is not implemented for `(dyn Debug + 'static)`
note: required by an implicit `Sized` bound in `Bar`
  --> $DIR/unsizing-wfcheck-issue-126272.rs:21:12
   |
LL | struct Bar<T>(T);
   |            ^ required by the implicit `Sized` requirement on this type parameter in `Bar`
help: you could relax the implicit `Sized` bound on `T` if it were used through indirection like `&T` or `Box<T>`
  --> $DIR/unsizing-wfcheck-issue-126272.rs:21:12
   |
LL | struct Bar<T>(T);
   |            ^  - ...if indirection were used here: `Box<T>`
   |            |
   |            this could be changed to `T: ?Sized`...

error[E0204]: the trait `ConstParamTy_` cannot be implemented for this type
  --> $DIR/unsizing-wfcheck-issue-126272.rs:8:32
   |
LL | #[derive(Debug, PartialEq, Eq, ConstParamTy)]
   |                                ^^^^^^^^^^^^
...
LL |     nested: &'static Bar<dyn std::fmt::Debug>,
   |     ----------------------------------------- this field does not implement `ConstParamTy_`
   |
   = note: this error originates in the derive macro `ConstParamTy` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0204]: the trait `ConstParamTy_` cannot be implemented for this type
  --> $DIR/unsizing-wfcheck-issue-126272.rs:8:32
   |
LL | #[derive(Debug, PartialEq, Eq, ConstParamTy)]
   |                                ^^^^^^^^^^^^
...
LL |     nested: &'static Bar<dyn std::fmt::Debug>,
   |     ----------------------------------------- this field does not implement `ConstParamTy_`
   |
note: the `ConstParamTy_` impl for `&'static Bar<(dyn Debug + 'static)>` requires that `(dyn Debug + 'static): Eq`
  --> $DIR/unsizing-wfcheck-issue-126272.rs:12:13
   |
LL |     nested: &'static Bar<dyn std::fmt::Debug>,
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: the `ConstParamTy_` impl for `&'static Bar<(dyn Debug + 'static)>` requires that `(dyn Debug + 'static): Sized`
  --> $DIR/unsizing-wfcheck-issue-126272.rs:12:13
   |
LL |     nested: &'static Bar<dyn std::fmt::Debug>,
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
note: the `ConstParamTy_` impl for `&'static Bar<(dyn Debug + 'static)>` requires that `(dyn Debug + 'static): UnsizedConstParamTy`
  --> $DIR/unsizing-wfcheck-issue-126272.rs:12:13
   |
LL |     nested: &'static Bar<dyn std::fmt::Debug>,
   |             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   = note: this error originates in the derive macro `ConstParamTy` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0277]: the size for values of type `(dyn Debug + 'static)` cannot be known at compilation time
  --> $DIR/unsizing-wfcheck-issue-126272.rs:12:5
   |
LL | #[derive(Debug, PartialEq, Eq, ConstParamTy)]
   |          ----- in this derive macro expansion
...
LL |     nested: &'static Bar<dyn std::fmt::Debug>,
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
   |
   = help: the trait `Sized` is not implemented for `(dyn Debug + 'static)`
   = help: the trait `Debug` is implemented for `Bar<T>`
note: required for `Bar<(dyn Debug + 'static)>` to implement `Debug`
  --> $DIR/unsizing-wfcheck-issue-126272.rs:20:10
   |
LL | #[derive(Debug, PartialEq, Eq, ConstParamTy)]
   |          ^^^^^
LL | struct Bar<T>(T);
   |            - unsatisfied trait bound introduced in this `derive` macro
   = note: 2 redundant requirements hidden
   = note: required for `&&'static Bar<(dyn Debug + 'static)>` to implement `Debug`
   = note: required for the cast from `&&&'static Bar<(dyn Debug + 'static)>` to `&dyn Debug`
   = note: this error originates in the derive macro `Debug` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0369]: binary operation `==` cannot be applied to type `&Bar<dyn Debug>`
  --> $DIR/unsizing-wfcheck-issue-126272.rs:12:5
   |
LL | #[derive(Debug, PartialEq, Eq, ConstParamTy)]
   |                 --------- in this derive macro expansion
...
LL |     nested: &'static Bar<dyn std::fmt::Debug>,
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: this error originates in the derive macro `PartialEq` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0277]: the trait bound `dyn Debug: Eq` is not satisfied
  --> $DIR/unsizing-wfcheck-issue-126272.rs:12:5
   |
LL | #[derive(Debug, PartialEq, Eq, ConstParamTy)]
   |                            -- in this derive macro expansion
...
LL |     nested: &'static Bar<dyn std::fmt::Debug>,
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ the trait `Eq` is not implemented for `dyn Debug`
   |
   = help: the trait `Eq` is implemented for `Bar<T>`
note: required for `Bar<dyn Debug>` to implement `Eq`
  --> $DIR/unsizing-wfcheck-issue-126272.rs:20:28
   |
LL | #[derive(Debug, PartialEq, Eq, ConstParamTy)]
   |                            ^^ unsatisfied trait bound introduced in this `derive` macro
   = note: 1 redundant requirement hidden
   = note: required for `&'static Bar<dyn Debug>` to implement `Eq`
note: required by a bound in `AssertParamIsEq`
  --> $SRC_DIR/core/src/cmp.rs:LL:COL
   = note: this error originates in the derive macro `Eq` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0277]: the size for values of type `dyn Debug` cannot be known at compilation time
  --> $DIR/unsizing-wfcheck-issue-126272.rs:12:5
   |
LL | #[derive(Debug, PartialEq, Eq, ConstParamTy)]
   |                            -- in this derive macro expansion
...
LL |     nested: &'static Bar<dyn std::fmt::Debug>,
   |     ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^ doesn't have a size known at compile-time
   |
   = help: the trait `Sized` is not implemented for `dyn Debug`
note: required by an implicit `Sized` bound in `Bar`
  --> $DIR/unsizing-wfcheck-issue-126272.rs:21:12
   |
LL | struct Bar<T>(T);
   |            ^ required by the implicit `Sized` requirement on this type parameter in `Bar`
help: you could relax the implicit `Sized` bound on `T` if it were used through indirection like `&T` or `Box<T>`
  --> $DIR/unsizing-wfcheck-issue-126272.rs:21:12
   |
LL | struct Bar<T>(T);
   |            ^  - ...if indirection were used here: `Box<T>`
   |            |
   |            this could be changed to `T: ?Sized`...
   = note: this error originates in the derive macro `Eq` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0277]: the size for values of type `(dyn Debug + 'static)` cannot be known at compilation time
  --> $DIR/unsizing-wfcheck-issue-126272.rs:26:33
   |
LL |     let x: Test<{ Foo { nested: &Bar(4) } }> = Test;
   |                                 ^^^^^^^ doesn't have a size known at compile-time
   |
   = help: the trait `Sized` is not implemented for `(dyn Debug + 'static)`
note: required by an implicit `Sized` bound in `Bar`
  --> $DIR/unsizing-wfcheck-issue-126272.rs:21:12
   |
LL | struct Bar<T>(T);
   |            ^ required by the implicit `Sized` requirement on this type parameter in `Bar`
help: you could relax the implicit `Sized` bound on `T` if it were used through indirection like `&T` or `Box<T>`
  --> $DIR/unsizing-wfcheck-issue-126272.rs:21:12
   |
LL | struct Bar<T>(T);
   |            ^  - ...if indirection were used here: `Box<T>`
   |            |
   |            this could be changed to `T: ?Sized`...

error: aborting due to 8 previous errors

Some errors have detailed explanations: E0204, E0277, E0369.
For more information about an error, try `rustc --explain E0204`.