src/test/ui/type-alias-impl-trait/generic_underconstrained2.full_tait.stderr

   1 error: at least one trait must be specified
   2   --> $DIR/generic_underconstrained2.rs:8:45
   3    |
   4 LL | type Underconstrained<T: std::fmt::Debug> = impl 'static;
   5    |                                             ^^^^^^^^^^^^
   6
   7 error: at least one trait must be specified
   8   --> $DIR/generic_underconstrained2.rs:17:46
   9    |
  10 LL | type Underconstrained2<T: std::fmt::Debug> = impl 'static;
  11    |                                              ^^^^^^^^^^^^
  12
  13 warning: the feature `type_alias_impl_trait` is incomplete and may not be safe to use and/or cause compiler crashes
  14   --> $DIR/generic_underconstrained2.rs:3:32
  15    |
  16 LL | #![cfg_attr(full_tait, feature(type_alias_impl_trait))]
  17    |                                ^^^^^^^^^^^^^^^^^^^^^
  18    |
  19    = note: `#[warn(incomplete_features)]` on by default
  20    = note: see issue #63063 <https://github.com/rust-lang/rust/issues/63063> for more information
  21
  22 error[E0277]: `U` doesn't implement `Debug`
  23   --> $DIR/generic_underconstrained2.rs:12:33
  24    |
  25 LL | type Underconstrained<T: std::fmt::Debug> = impl 'static;
  26    |                          --------------- required by this bound in `Underconstrained`
  27 ...
  28 LL | fn underconstrained<U>(_: U) -> Underconstrained<U> {
  29    |                                 ^^^^^^^^^^^^^^^^^^^ `U` cannot be formatted using `{:?}` because it doesn't implement `Debug`
  30    |
  31 help: consider restricting type parameter `U`
  32    |
  33 LL | fn underconstrained<U: std::fmt::Debug>(_: U) -> Underconstrained<U> {
  34    |                      ^^^^^^^^^^^^^^^^^
  35
  36 error[E0277]: `V` doesn't implement `Debug`
  37   --> $DIR/generic_underconstrained2.rs:21:43
  38    |
  39 LL | type Underconstrained2<T: std::fmt::Debug> = impl 'static;
  40    |                           --------------- required by this bound in `Underconstrained2`
  41 ...
  42 LL | fn underconstrained2<U, V>(_: U, _: V) -> Underconstrained2<V> {
  43    |                                           ^^^^^^^^^^^^^^^^^^^^ `V` cannot be formatted using `{:?}` because it doesn't implement `Debug`
  44    |
  45 help: consider restricting type parameter `V`
  46    |
  47 LL | fn underconstrained2<U, V: std::fmt::Debug>(_: U, _: V) -> Underconstrained2<V> {
  48    |                          ^^^^^^^^^^^^^^^^^
  49
  50 error: aborting due to 4 previous errors; 1 warning emitted
  51
  52 For more information about this error, try `rustc --explain E0277`.