error: UnwrapVariant can only be derived for single unnamed variants
 --> tests/unwrap_variant/fail/wrong_variants.rs:6:5
  |
6 | /     #[unwrap(ref)]
7 | |     A { v: u8 },
  | |_______________^

error: UnwrapVariant can only be derived for single unnamed variants
 --> tests/unwrap_variant/fail/wrong_variants.rs:8:5
  |
8 | /     #[unwrap(mut)]
9 | |     B,
  | |_____^

error: UnwrapVariant can only be derived for single unnamed variants
  --> tests/unwrap_variant/fail/wrong_variants.rs:10:5
   |
10 | /     #[unwrap(ref, mut)]
11 | |     C(u8, u8),
   | |_____________^

error: UnwrapVariant can only be derived for single unnamed variants
  --> tests/unwrap_variant/fail/wrong_variants.rs:12:5
   |
12 | /     #[unwrap(ref)]
13 | |     D { },
   | |_________^