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