error[E0658]: `impl Trait` in type aliases is unstable
  --> $DIR/feature-gate-type_alias_impl_trait.rs:3:12
   |
LL | type Foo = impl Debug;
   |            ^^^^^^^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/63063
   = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable

error[E0658]: `impl Trait` in type aliases is unstable
  --> $DIR/feature-gate-type_alias_impl_trait.rs:11:16
   |
LL |     type Baa = impl Debug;
   |                ^^^^^^^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/63063
   = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable

error[E0658]: `impl Trait` in type aliases is unstable
  --> $DIR/feature-gate-type_alias_impl_trait.rs:18:18
   |
LL |     type Assoc = impl Debug;
   |                  ^^^^^^^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/63063
   = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable

error[E0658]: associated type defaults are unstable
  --> $DIR/feature-gate-type_alias_impl_trait.rs:18:5
   |
LL |     type Assoc = impl Debug;
   |     ^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/29661
   = help: add `#![feature(associated_type_defaults)]` to the crate attributes to enable

error[E0658]: `impl Trait` in type aliases is unstable
  --> $DIR/feature-gate-type_alias_impl_trait.rs:24:24
   |
LL | type NestedFree = (Vec<impl Debug>, impl Debug, impl Iterator<Item = impl Debug>);
   |                        ^^^^^^^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/63063
   = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable

error[E0658]: `impl Trait` in type aliases is unstable
  --> $DIR/feature-gate-type_alias_impl_trait.rs:24:37
   |
LL | type NestedFree = (Vec<impl Debug>, impl Debug, impl Iterator<Item = impl Debug>);
   |                                     ^^^^^^^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/63063
   = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable

error[E0658]: `impl Trait` in type aliases is unstable
  --> $DIR/feature-gate-type_alias_impl_trait.rs:24:49
   |
LL | type NestedFree = (Vec<impl Debug>, impl Debug, impl Iterator<Item = impl Debug>);
   |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/63063
   = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable

error[E0658]: `impl Trait` in type aliases is unstable
  --> $DIR/feature-gate-type_alias_impl_trait.rs:24:70
   |
LL | type NestedFree = (Vec<impl Debug>, impl Debug, impl Iterator<Item = impl Debug>);
   |                                                                      ^^^^^^^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/63063
   = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable

error[E0658]: `impl Trait` in type aliases is unstable
  --> $DIR/feature-gate-type_alias_impl_trait.rs:34:21
   |
LL |     type Baa = (Vec<impl Debug>, impl Debug, impl Iterator<Item = impl Debug>);
   |                     ^^^^^^^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/63063
   = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable

error[E0658]: `impl Trait` in type aliases is unstable
  --> $DIR/feature-gate-type_alias_impl_trait.rs:34:34
   |
LL |     type Baa = (Vec<impl Debug>, impl Debug, impl Iterator<Item = impl Debug>);
   |                                  ^^^^^^^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/63063
   = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable

error[E0658]: `impl Trait` in type aliases is unstable
  --> $DIR/feature-gate-type_alias_impl_trait.rs:34:46
   |
LL |     type Baa = (Vec<impl Debug>, impl Debug, impl Iterator<Item = impl Debug>);
   |                                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/63063
   = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable

error[E0658]: `impl Trait` in type aliases is unstable
  --> $DIR/feature-gate-type_alias_impl_trait.rs:34:67
   |
LL |     type Baa = (Vec<impl Debug>, impl Debug, impl Iterator<Item = impl Debug>);
   |                                                                   ^^^^^^^^^^
   |
   = note: for more information, see https://github.com/rust-lang/rust/issues/63063
   = help: add `#![feature(type_alias_impl_trait)]` to the crate attributes to enable

error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
  --> $DIR/feature-gate-type_alias_impl_trait.rs:18:18
   |
LL |     type Assoc = impl Debug;
   |                  ^^^^^^^^^^

error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
  --> $DIR/feature-gate-type_alias_impl_trait.rs:24:24
   |
LL | type NestedFree = (Vec<impl Debug>, impl Debug, impl Iterator<Item = impl Debug>);
   |                        ^^^^^^^^^^

error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
  --> $DIR/feature-gate-type_alias_impl_trait.rs:24:37
   |
LL | type NestedFree = (Vec<impl Debug>, impl Debug, impl Iterator<Item = impl Debug>);
   |                                     ^^^^^^^^^^

error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
  --> $DIR/feature-gate-type_alias_impl_trait.rs:24:49
   |
LL | type NestedFree = (Vec<impl Debug>, impl Debug, impl Iterator<Item = impl Debug>);
   |                                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
  --> $DIR/feature-gate-type_alias_impl_trait.rs:34:21
   |
LL |     type Baa = (Vec<impl Debug>, impl Debug, impl Iterator<Item = impl Debug>);
   |                     ^^^^^^^^^^

error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
  --> $DIR/feature-gate-type_alias_impl_trait.rs:34:34
   |
LL |     type Baa = (Vec<impl Debug>, impl Debug, impl Iterator<Item = impl Debug>);
   |                                  ^^^^^^^^^^

error[E0562]: `impl Trait` not allowed outside of function and inherent method return types
  --> $DIR/feature-gate-type_alias_impl_trait.rs:34:46
   |
LL |     type Baa = (Vec<impl Debug>, impl Debug, impl Iterator<Item = impl Debug>);
   |                                              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 19 previous errors

Some errors have detailed explanations: E0562, E0658.
For more information about an error, try `rustc --explain E0562`.