1 error[E0091]: type parameter `T` is unused
4 LL | type Foo<T> = u32;
5 | ^ unused type parameter
7 error[E0091]: type parameter `B` is unused
10 LL | type Foo2<A, B> = Box<A>;
11 | ^ unused type parameter
13 error: aborting due to 2 previous errors
15 For more information about this error, try `rustc --explain E0091`.