@achow101 noted we don't reject them therefore they must be silently accepted. This is not part of the specs, we should remove them. Also cc @sipa.

I can take care of this.
{
    using namespace spanparsing;
    bool permit_uncompressed = ctx == ParseScriptContext::TOP || ctx == ParseScriptContext::P2SH;
    auto split = Split(sp, '/');
    std::string str(split[0].begin(), split[0].end());
    if (str.size() == 0) {
        error = "No key provided";
        return nullptr;
    }
    if (split.size() == 1) {
        if (IsHex(str)) {
            std::vector<unsigned char> data = ParseHex(str);
            CPubKey pubkey(data);
            if (pubkey.IsFullyValid()) {
                if (permit_uncompressed || pubkey.IsCompressed()) {
                    return std::make_unique<ConstPubkeyProvider>(key_exp_index, pubkey, false);
                } else {
                    error = "Uncompressed keys are not allowed";
                    return nullptr;
                }
            } else if (data.size() == 32 && ctx == ParseScriptContext::P2TR) {
                unsigned char fullkey[33] = {0x02};
                std::copy(data.begin(), data.end(), fullkey + 1);
                pubkey.Set(std::begin(fullkey), std::end(fullkey));