Steps to reproduce:

* Build with `integer` sanitizer
* Start: `UBSAN_OPTIONS="suppressions=$(pwd)/test/sanitizer_suppressions/ubsan:print_stacktrace=1:halt_on_error=1:report_error_type=1" ./src/qt/bitcoin-qt -chain=main`
* Enter `getdescriptorinfo "sh(multi(1,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,[00000000]xprv9uPDJpEQgRQfDcW7BkF7eTya6RPxXeJCqCJGHuCJ4GiRVLzkTXBAJMu2qaMWPrS7AANYqdq6vcBcBUdJCVVFceUvJFjaPdGZ2y9WACViL4L/58)0)"` into the console
} 
    assert(!desc_prefix.empty());
    
    if (Params().IsTestChain()) {
        desc_prefix += "/1'";
    } else {
        desc_prefix += "/0'";
    }
    std::string internal_path = internal ? "/1" : "/0";
    std::string desc_str = desc_prefix + "/0'" + internal_path + desc_suffix;
    
    FlatSigningProvider keys;
    std::string error;
    std::unique_ptr<Descriptor> desc = Parse(desc_str, keys, error, false);
    WalletDescriptor w_desc(std::move(desc), creation_time, 0, 0, 0);
    m_wallet_descriptor = w_desc;
    
    WalletBatch batch(m_storage.GetDatabase());
    if (!AddDescriptorKeyWithDB(batch, master_key.key, master_key.key.GetPubKey())) {
        throw std::runtime_error(std::string(__func__) + ": writing descriptor master private key failed");
    }
    if (!batch.WriteDescriptor(GetID(), m_wallet_descriptor)) {
        throw std::runtime_error(std::string(__func__) + ": writing descriptor failed");
    }
    
    TopUp();
    m_storage.UnsetBlankWalletFlag(batch);
    return true;
}
bool DescriptorScriptPubKeyMan::IsHDEnabled() const