error: #[serde(field_identifier)] and #[serde(variant_identifier)] cannot both be set
 --> tests/ui/identifier/both.rs:4:9
  |
3 | #[derive(Deserialize)]
  |          ----------- in this derive macro expansion
4 | #[serde(field_identifier, variant_identifier)]
  |         ^^^^^^^^^^^^^^^^
  |
  = note: this error originates in the derive macro `Deserialize` (in Nightly builds, run with -Z macro-backtrace for more info)

error: #[serde(field_identifier)] and #[serde(variant_identifier)] cannot both be set
 --> tests/ui/identifier/both.rs:4:27
  |
3 | #[derive(Deserialize)]
  |          ----------- in this derive macro expansion
4 | #[serde(field_identifier, variant_identifier)]
  |                           ^^^^^^^^^^^^^^^^^^
  |
  = note: this error originates in the derive macro `Deserialize` (in Nightly builds, run with -Z macro-backtrace for more info)