error[E0276]: impl has stricter requirements than trait
  --> $DIR/mismatched-where-clause-regions.rs:8:38
   |
LL |     type T<'a1, 'b1>
   |     ---------------- definition of `T` from trait
...
LL |     type T<'a2, 'b2> = () where 'b2: 'a2;
   |                                      ^^^ impl has extra requirement `'b2: 'a2`
   |
help: copy the `where` clause predicates from the trait
   |
LL |     type T<'a2, 'b2> = () where 'a2: 'b2;
   |                           ~~~~~~~~~~~~~~

error: aborting due to 1 previous error

For more information about this error, try `rustc --explain E0276`.