error[E0107]: missing generics for associated type `Provider::A`
  --> $DIR/issue-71176.rs:10:27
   |
LL |   inner: Box<dyn Provider<A = B>>,
   |                           ^ expected 1 lifetime argument
   |
note: associated type defined here, with 1 lifetime parameter: `'a`
  --> $DIR/issue-71176.rs:2:10
   |
LL |     type A<'a>;
   |          ^ --
help: add missing lifetime argument
   |
LL |   inner: Box<dyn Provider<A<'a> = B>>,
   |                            ++++

error[E0107]: missing generics for associated type `Provider::A`
  --> $DIR/issue-71176.rs:10:27
   |
LL |   inner: Box<dyn Provider<A = B>>,
   |                           ^ expected 1 lifetime argument
   |
note: associated type defined here, with 1 lifetime parameter: `'a`
  --> $DIR/issue-71176.rs:2:10
   |
LL |     type A<'a>;
   |          ^ --
   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
help: add missing lifetime argument
   |
LL |   inner: Box<dyn Provider<A<'a> = B>>,
   |                            ++++

error[E0107]: missing generics for associated type `Provider::A`
  --> $DIR/issue-71176.rs:10:27
   |
LL |   inner: Box<dyn Provider<A = B>>,
   |                           ^ expected 1 lifetime argument
   |
note: associated type defined here, with 1 lifetime parameter: `'a`
  --> $DIR/issue-71176.rs:2:10
   |
LL |     type A<'a>;
   |          ^ --
   = note: duplicate diagnostic emitted due to `-Z deduplicate-diagnostics=no`
help: add missing lifetime argument
   |
LL |   inner: Box<dyn Provider<A<'a> = B>>,
   |                            ++++

error[E0038]: the trait `Provider` is not dyn compatible
  --> $DIR/issue-71176.rs:10:14
   |
LL |   inner: Box<dyn Provider<A = B>>,
   |              ^^^^^^^^^^^^^^^^^^^ `Provider` is not dyn compatible
   |
note: for a trait to be dyn compatible it needs to allow building a vtable
      for more information, visit <https://doc.rust-lang.org/reference/items/traits.html#dyn-compatibility>
  --> $DIR/issue-71176.rs:2:10
   |
LL | trait Provider {
   |       -------- this trait is not dyn compatible...
LL |     type A<'a>;
   |          ^ ...because it contains the generic associated type `A`
   = help: consider moving `A` to another trait
   = help: only type `()` implements `Provider`; consider using it directly instead.

error[E0038]: the trait `Provider` is not dyn compatible
  --> $DIR/issue-71176.rs:19:16
   |
LL |         inner: Box::new(()),
   |                ^^^^^^^^^^^^ `Provider` is not dyn compatible
   |
note: for a trait to be dyn compatible it needs to allow building a vtable
      for more information, visit <https://doc.rust-lang.org/reference/items/traits.html#dyn-compatibility>
  --> $DIR/issue-71176.rs:2:10
   |
LL | trait Provider {
   |       -------- this trait is not dyn compatible...
LL |     type A<'a>;
   |          ^ ...because it contains the generic associated type `A`
   = help: consider moving `A` to another trait
   = help: only type `()` implements `Provider`; consider using it directly instead.

error: aborting due to 5 previous errors

Some errors have detailed explanations: E0038, E0107.
For more information about an error, try `rustc --explain E0038`.