A call to `removeprunedfunds` does not update the transaction list in the GUI, and trying to access the info of a deleted transaction will result in a segfault.

```bash
(lldb) run
Process 4859 launched: '/Users/michael/github/bitcoin/src/qt/bitcoin-qt' (x86_64)
2019-09-24 15:41:53.763094+0800 bitcoin-qt[4859:390268] MessageTracer: Falling back to default whitelist
Process 4859 stopped
* thread #1, name = 'bitcoin-main', queue = 'com.apple.main-thread', stop reason = EXC_BAD_ACCESS (code=1, address=0x34)
    frame #0: 0x00000001001c9bf6 bitcoin-qt`TransactionDesc::FormatTxStatus(wtx=0x00007ffeefbfc0e0, status=0x00007ffeefbfc0c0, inMempool=false, numBlocks=1) at transactiondesc.cpp:33:31
   30  	{
   31  	    if (!status.is_final)
   32  	    {
-> 33  	        if (wtx.tx->nLockTime < LOCKTIME_THRESHOLD)
   34  	            return tr("Open for %n more block(s)", "", wtx.tx->nLockTime - numBlocks);
   35  	        else
   36  	            return tr("Open until %1").arg(GUIUtil::dateTimeStr(wtx.tx->nLockTime));
Target 0: (bitcoin-qt) stopped.
```
{
    assert(!IsWalletFlagSet(WALLET_FLAG_DISABLE_PRIVATE_KEYS));
    assert(!IsWalletFlagSet(WALLET_FLAG_BLANK_WALLET));
    AssertLockHeld(cs_wallet);
    bool fCompressed = CanSupportFeature(FEATURE_COMPRPUBKEY); 
    CKey secret;
    
    int64_t nCreationTime = GetTime();
    CKeyMetadata metadata(nCreationTime);
    
    if (IsHDEnabled()) {
        DeriveNewChildKey(batch, metadata, secret, (CanSupportFeature(FEATURE_HD_SPLIT) ? internal : false));
    } else {
        secret.MakeNewKey(fCompressed);
    }
    
    if (fCompressed) {
        SetMinVersion(FEATURE_COMPRPUBKEY);
    }
    CPubKey pubkey = secret.GetPubKey();
    assert(secret.VerifyPubKey(pubkey));
    mapKeyMetadata[pubkey.GetID()] = metadata;
    UpdateTimeFirstKey(nCreationTime);
    if (!AddKeyPubKeyWithDB(batch, secret, pubkey)) {
        throw std::runtime_error(std::string(__func__) + ": AddKey failed");
    }
    return pubkey;
}
void CWallet::DeriveNewChildKey(WalletBatch &batch, CKeyMetadata& metadata, CKey& secret, bool internal)