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error[E0207]: the lifetime parameter `'a` is not constrained by the impl trait, self type, or predicates
  --> $DIR/type-alias-impl-trait-unconstrained-lifetime.rs:10:6
   |
LL | impl<'a, I: Iterator<Item = i32>> Trait for (i32, I) {
   |      ^^ unconstrained lifetime parameter

error[E0792]: expected generic lifetime parameter, found `'_`
  --> $DIR/type-alias-impl-trait-unconstrained-lifetime.rs:14:9
   |
LL | impl<'a, I: Iterator<Item = i32>> Trait for (i32, I) {
   |      -- this generic parameter must be used with a generic lifetime parameter
...
LL |         (0_i32, [0_i32].iter().copied())
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: aborting due to 2 previous errors

Some errors have detailed explanations: E0207, E0792.
For more information about an error, try `rustc --explain E0207`.