error: Transparent format can only be applied to structs with one field (got 0)
 --> tests/ui/derive-transparent-empty.rs:7:10
  |
7 | #[derive(defmt::Format)]
  |          ^^^^^^^^^^^^^
  |
  = note: this error originates in the derive macro `defmt::Format` (in Nightly builds, run with -Z macro-backtrace for more info)

error: Transparent format can only be applied when all variants have exactly one field (got 0)
  --> tests/ui/derive-transparent-empty.rs:11:10
   |
11 | #[derive(defmt::Format)]
   |          ^^^^^^^^^^^^^
   |
   = note: this error originates in the derive macro `defmt::Format` (in Nightly builds, run with -Z macro-backtrace for more info)

error[E0004]: non-exhaustive patterns: type `&&Empty` is non-empty
 --> tests/ui/derive-transparent-empty.rs:3:10
  |
3 | #[derive(defmt::Format)]
  |          ^^^^^^^^^^^^^
  |
note: `Empty` defined here
 --> tests/ui/derive-transparent-empty.rs:5:6
  |
5 | enum Empty {}
  |      ^^^^^
  = note: the matched value is of type `&&Empty`
  = note: this error originates in the derive macro `defmt::Format` (in Nightly builds, run with -Z macro-backtrace for more info)