error[E0275]: overflow evaluating the requirement `<(T,) as Grault>::A == _`
  --> $DIR/impl-wf-cycle-5.rs:22:1
   |
LL | / impl<T> Grault for (T,)
LL | |
LL | | where
LL | |     T: Grault,
LL | |     Self::A: Baz,
   | |_________________^
LL |   {
LL |       type A = ();
   |       ------ associated type `<(T,) as Grault>::A` is specified here
   |
note: required for `(T,)` to implement `Grault`
  --> $DIR/impl-wf-cycle-5.rs:22:9
   |
LL | impl<T> Grault for (T,)
   |         ^^^^^^     ^^^^
...
LL |     Self::A: Baz,
   |              --- unsatisfied trait bound introduced here
help: associated type for the current `impl` cannot be restricted in `where` clauses, remove this bound
   |
LL -     T: Grault,
LL -     Self::A: Baz,
LL +     T: Grault,
   |

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0275`.