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error[E0277]: `T` doesn't implement `std::fmt::Display`
  --> $DIR/generic-associated-types-where.rs:18:22
   |
LL |     type Assoc2<T> = Vec<T>;
   |                      ^^^^^^ the trait `std::fmt::Display` is not implemented for `T`
   |
help: consider restricting type parameter `T` with trait `Display`
   |
LL |     type Assoc2<T: std::fmt::Display> = Vec<T>;
   |                  +++++++++++++++++++

error[E0276]: impl has stricter requirements than trait
  --> $DIR/generic-associated-types-where.rs:20:38
   |
LL |     type Assoc3<T>;
   |     -------------- definition of `Assoc3` from trait
...
LL |     type Assoc3<T> = Vec<T> where T: Iterator;
   |                                      ^^^^^^^^ impl has extra requirement `T: Iterator`

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0276, E0277.
For more information about an error, try `rustc --explain E0276`.