1 error[E0005]: refutable pattern in local binding
2 --> $DIR/empty-never-array.rs:10:9
4 LL | let Helper::U(u) = Helper::T(t, []);
5 | ^^^^^^^^^^^^ pattern `Helper::T(_, _)` not covered
7 = note: `let` bindings require an "irrefutable pattern", like a `struct` or an `enum` with only one variant
8 = note: for more information, visit https://doc.rust-lang.org/book/ch18-02-refutability.html
9 note: `Helper<T, U>` defined here
10 --> $DIR/empty-never-array.rs:3:6
12 LL | enum Helper<T, U> {
16 = note: the matched value is of type `Helper<T, U>`
17 help: you might want to use `let else` to handle the variant that isn't matched
19 LL | let Helper::U(u) = Helper::T(t, []) else { todo!() };
22 error: aborting due to previous error
24 For more information about this error, try `rustc --explain E0005`.