While regtesting with [bitcoin-spock](https://github.com/msgilligan/bitcoin-spock) I noticed at some point the transaction creation via `sendtoaddress -> CreateTransaction()` fails, because the created transaction is larger than `MAX_STANDARD_TX_SIZE`.

During the process a lot of raw transactions are created, which have smallish outputs and when then using `sendtoaddress`, it appears to attempt to create a transaction that spends too many of those dust-ish outputs.

The transaction to create does not have many outputs, but it looks like it's caused by the coin selection, which selects too many inputs. Testing was done with a 0.9 branch, but on the first glimpse I believe this issue is as well be present in 0.10. If this is a known issue, and if there is already a guard against this behavior, I'd be happy about a hint.

Sorry in advance, I do not have a test script to reproduce this issue in an isolated manner. A potential fix would probably require to adjust the coin selection, so that it selects a combination of coins, which, in addition to the size of the rest of the transaction, is still smaller than the limit.

if (!spendable && params.only_spendable) continue;
            
            std::vector<std::vector<uint8_t>> script_solutions;
            TxoutType type = Solver(output.scriptPubKey, script_solutions);
            
            
            
            
            bool is_from_p2sh{false};
            if (type == TxoutType::SCRIPTHASH && solvable) {
                CScript script;
                if (!provider->GetCScript(CScriptID(uint160(script_solutions[0])), script)) continue;
                type = Solver(script, script_solutions);
                is_from_p2sh = true;
            }
            result.Add(GetOutputType(type, is_from_p2sh),
                       COutput(outpoint, output, nDepth, input_bytes, spendable, solvable, safeTx, wtx.GetTxTime(), tx_from_me, feerate));
            
            if (params.min_sum_amount != MAX_MONEY) {
                if (result.GetTotalAmount() >= params.min_sum_amount) {
                    return result;
                }
            }
            
            if (params.max_count > 0 && result.Size() >= params.max_count) {
                return result;
            }
        }
    }