twenty-first 2.0.2

Collection of mathematics routines and cryptography for the twenty-first century.
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error: proc-macro derive panicked
 --> trybuild/multiple_field_attributes.rs:3:10
  |
3 | #[derive(BFieldCodec)]
  |          ^^^^^^^^^^^
  |
  = help: message: field `a` must have at most 1 `bfield_codec` attribute