error[E0412]: cannot find type `N` in this scope
  --> $DIR/issue-50480.rs:3:12
   |
LL | struct Foo(N, NotDefined, <i32 as Iterator>::Item, Vec<i32>, String);
   |            ^ not found in this scope
   |
help: you might be missing a type parameter
   |
LL | struct Foo<N>(N, NotDefined, <i32 as Iterator>::Item, Vec<i32>, String);
   |           +++

error[E0412]: cannot find type `NotDefined` in this scope
  --> $DIR/issue-50480.rs:3:15
   |
LL | struct Foo(N, NotDefined, <i32 as Iterator>::Item, Vec<i32>, String);
   |               ^^^^^^^^^^ not found in this scope

error[E0412]: cannot find type `N` in this scope
  --> $DIR/issue-50480.rs:3:12
   |
LL | struct Foo(N, NotDefined, <i32 as Iterator>::Item, Vec<i32>, String);
   |            ^ not found in this scope
   |
help: you might be missing a type parameter
   |
LL | struct Foo<N>(N, NotDefined, <i32 as Iterator>::Item, Vec<i32>, String);
   |           +++

error[E0412]: cannot find type `NotDefined` in this scope
  --> $DIR/issue-50480.rs:3:15
   |
LL | struct Foo(N, NotDefined, <i32 as Iterator>::Item, Vec<i32>, String);
   |               ^^^^^^^^^^ not found in this scope
   |
help: you might be missing a type parameter
   |
LL | struct Foo<NotDefined>(N, NotDefined, <i32 as Iterator>::Item, Vec<i32>, String);
   |           ++++++++++++

error[E0412]: cannot find type `N` in this scope
  --> $DIR/issue-50480.rs:11:18
   |
LL | struct Bar<T>(T, N, NotDefined, <i32 as Iterator>::Item, Vec<i32>, String);
   |            -     ^
   |            |
   |            similarly named type parameter `T` defined here
   |
help: a type parameter with a similar name exists
   |
LL | struct Bar<T>(T, T, NotDefined, <i32 as Iterator>::Item, Vec<i32>, String);
   |                  ~
help: you might be missing a type parameter
   |
LL | struct Bar<T, N>(T, N, NotDefined, <i32 as Iterator>::Item, Vec<i32>, String);
   |             +++

error[E0412]: cannot find type `NotDefined` in this scope
  --> $DIR/issue-50480.rs:11:21
   |
LL | struct Bar<T>(T, N, NotDefined, <i32 as Iterator>::Item, Vec<i32>, String);
   |                     ^^^^^^^^^^ not found in this scope

error[E0204]: the trait `Copy` cannot be implemented for this type
  --> $DIR/issue-50480.rs:1:17
   |
LL | #[derive(Clone, Copy)]
   |                 ^^^^
LL |
LL | struct Foo(N, NotDefined, <i32 as Iterator>::Item, Vec<i32>, String);
   |                                                    --------  ------ this field does not implement `Copy`
   |                                                    |
   |                                                    this field does not implement `Copy`
   |
   = note: this error originates in the derive macro `Copy` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0204]: the trait `Copy` cannot be implemented for this type
  --> $DIR/issue-50480.rs:9:17
   |
LL | #[derive(Clone, Copy)]
   |                 ^^^^
LL |
LL | struct Bar<T>(T, N, NotDefined, <i32 as Iterator>::Item, Vec<i32>, String);
   |                                                          --------  ------ this field does not implement `Copy`
   |                                                          |
   |                                                          this field does not implement `Copy`
   |
   = note: this error originates in the derive macro `Copy` (in Nightly builds, run with -Z macro-backtrace for more info)

error: aborting due to 8 previous errors

Some errors have detailed explanations: E0204, E0412.
For more information about an error, try `rustc --explain E0204`.