error: #[arma(default)] cannot be used on new type structs
 --> tests/derive/fail_struct_newtype_default.rs:4:8
  |
4 | #[arma(default)]
  |        ^^^^^^^

error: #[arma(default)] cannot be used on new type structs
 --> tests/derive/fail_struct_newtype_default.rs:8:21
  |
8 | struct Field(#[arma(default)] u32);
  |                     ^^^^^^^