Reported by @kallewoof here: https://github.com/bitcoin/bitcoin/pull/13917#issuecomment-412459298

```
$ ./bitcoin-cli createpsbt "[]" "[{\"$(./bitcoin-cli getnewaddress)\":0.01}]"
cHNidP8BACoCAAAAAAFAQg8AAAAAABepFG6Rty1Vk+fUOR4v9E6R6YXDFkHwhwAAAAAAAA==
$ ./bitcoin-cli decodepsbt cHNidP8BACoCAAAAAAFAQg8AAAAAABepFG6Rty1Vk+fUOR4v9E6R6YXDFkHwhwAAAAAAAA==
error code: -22
error message:
TX decode failed CDataStream::read(): end of data: unspecified iostream_category error
```

case PSBT_IN_REDEEMSCRIPT:
                {
                    if (!redeem_script.empty()) {
                        throw std::ios_base::failure("Duplicate Key, input redeemScript already provided");
                    } else if (key.size() != 1) {
                        throw std::ios_base::failure("Input redeemScript key is more than one byte type");
                    }
                    s >> redeem_script;
                    break;
                }
                case PSBT_IN_WITNESSSCRIPT:
                {
                    if (!witness_script.empty()) {
                        throw std::ios_base::failure("Duplicate Key, input witnessScript already provided");
                    } else if (key.size() != 1) {
                        throw std::ios_base::failure("Input witnessScript key is more than one byte type");
                    }
                    s >> witness_script;
                    break;
                }
                case PSBT_IN_BIP32_DERIVATION:
                {
                    DeserializeHDKeypaths(s, key, hd_keypaths);
                    break;
                }
                case PSBT_IN_SCRIPTSIG:
                {
                    if (!final_script_sig.empty()) {
                        throw std::ios_base::failure("Duplicate Key, input final scriptSig already provided");
                    } else if (key.size() != 1) {