rust/src/test/ui/error-codes/E0091.stderr

error[E0091]: type parameter `T` is unused
  --> $DIR/E0091.rs:11:10
   |
LL | type Foo<T> = u32; //~ ERROR E0091
   |          ^ unused type parameter

error[E0091]: type parameter `B` is unused
  --> $DIR/E0091.rs:12:14
   |
LL | type Foo2<A, B> = Box<A>; //~ ERROR E0091
   |              ^ unused type parameter

error: aborting due to 2 previous errors

If you want more information on this error, try using "rustc --explain E0091"