error: #[serde(field_identifier)] and #[serde(variant_identifier)] cannot both be set
 --> tests/ui/identifier/both.rs:4:9
  |
4 | #[serde(field_identifier, variant_identifier)]
  |         ^^^^^^^^^^^^^^^^

error: #[serde(field_identifier)] and #[serde(variant_identifier)] cannot both be set
 --> tests/ui/identifier/both.rs:4:27
  |
4 | #[serde(field_identifier, variant_identifier)]
  |                           ^^^^^^^^^^^^^^^^^^