error: encountered duplicate `filled` parameter: duplicate set to true
 --> $DIR/duplicate-parameters.rs:4:27
  |
4 | #[bitfield(filled = true, filled = true)]
  |                           ^^^^^^

error: previous `filled` parameter here
 --> $DIR/duplicate-parameters.rs:4:12
  |
4 | #[bitfield(filled = true, filled = true)]
  |            ^^^^^^