There may be a bug public.rs, please see code section with comment.

[godadada]

        PublicParams::ECDSA { ref curve, ref p } => f
            .debug_struct("PublicParams::ECDSA")
            .field("curve", curve)
            .field("p", &p)
            .finish(),
        PublicParams::ECDH {
            ref curve,
            ref p,
            hash,
            alg_sym,
        } => f
            .debug_struct("PublicParams::ECDSA")
                                                          // Should be ECDH?
            .field("curve", curve)
            .field("hash", hash)
            .field("alg_sym", alg_sym)
            .field("p", &p)
            .finish(),

PublicParams::Elgamal {

[dignifiedquire]

Yes, looks like it. Want to make a PR?