Steps to reproduce:

* Build with `integer` sanitizer
* `UBSAN_OPTIONS="suppressions=$(pwd)/test/sanitizer_suppressions/ubsan:print_stacktrace=1:halt_on_error=1:report_error_type=1" ./src/qt/bitcoin-qt`
* Enter into the RPC debug console: `decodepsbt "cHNidP8BAKOro2MDAwMDA5ggCAAA////CQAtAAD+///1AAAAAAAAAAAAAAAQAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAJAAAAAAAAAAAAAAAAAAAAAAAAAD+///1Zm9ybmV3nWx1Y2vmelLmegAAAAAAAAAAAAAAAAAAAAMKAwMDAwMDAwMDAwMACvMBA3FkAAAAAAAAAAAABAAlAAAAAAAAACEWDQ0zDQ0NDQ0NDQ0NCwEAAH9/f39/fwMAAABNo6P///kAAA=="`
switch(type) {
                case PSBT_GLOBAL_UNSIGNED_TX:
                {
                    if (!key_lookup.emplace(key).second) {
                        throw std::ios_base::failure("Duplicate Key, unsigned tx already provided");
                    } else if (key.size() != 1) {
                        throw std::ios_base::failure("Global unsigned tx key is more than one byte type");
                    }
                    CMutableTransaction mtx;
                    
                    OverrideStream<Stream> os(&s, s.GetType(), s.GetVersion() | SERIALIZE_TRANSACTION_NO_WITNESS);
                    UnserializeFromVector(os, mtx);
                    tx = std::move(mtx);
                    
                    for (const CTxIn& txin : tx->vin) {
                        if (!txin.scriptSig.empty() || !txin.scriptWitness.IsNull()) {
                            throw std::ios_base::failure("Unsigned tx does not have empty scriptSigs and scriptWitnesses.");
                        }
                    }
                    break;
                }
                case PSBT_GLOBAL_XPUB:
                {
                    if (key.size() != BIP32_EXTKEY_WITH_VERSION_SIZE + 1) {
                        throw std::ios_base::failure("Size of key was not the expected size for the type global xpub");
                    }
                    
                    CExtPubKey xpub;
                    xpub.DecodeWithVersion(&key.data()[1]);
                    if (!xpub.pubkey.IsFullyValid()) {