```
error: equality constraints are not yet supported in `where` clauses
  --> $DIR/equality-bound.rs:50:9
   |
LL |         IntoIterator::Item = A,
   |         ^^^^^^^^^^^^^^^^^^^^^^ not supported
   |
   = note: see issue rust-lang#20041 <rust-lang#20041> for more information
help: if `IntoIterator::Item` is an associated type you're trying to set, use the associated type binding syntax
   |
LL ~     fn from_iter<T: IntoIterator<Item = A>>(_: T) -> Self
LL |     where
LL ~
   |

error: equality constraints are not yet supported in `where` clauses
  --> $DIR/equality-bound.rs:63:9
   |
LL |         T::Item = A,
   |         ^^^^^^^^^^^ not supported
   |
   = note: see issue rust-lang#20041 <rust-lang#20041> for more information
help: if `IntoIterator::Item` is an associated type you're trying to set, use the associated type binding syntax
   |
LL ~     fn from_iter<T: IntoIterator<Item = A>>(_: T) -> Self
LL |     where
LL ~
   |
```

Fix rust-lang#68982.