Calling `*txoutset` calls in the console has been broken since #19056. The addition of the `RpcInterruptionPoint()` calls means that any user running the GUI without passing `-server`, will just see ["Shutting down"](https://github.com/bitcoin/bitcoin/blob/b33136b6ba9887f7db651c4c5264ca7f2f601df7/src/rpc/server.cpp#L325) printed to the console:

![console](https://user-images.githubusercontent.com/863730/84460760-55599a80-ac9d-11ea-8720-a718edde75dd.png)

cc @MarcoFalke 
{
            RPCHelpMan{"getmempoolancestors",
                "\nIf txid is in the mempool, returns all in-mempool ancestors.\n",
                {
                    {"txid", RPCArg::Type::STR_HEX, RPCArg::Optional::NO, "The transaction id (must be in mempool)"},
                    {"verbose", RPCArg::Type::BOOL,  "false", "True for a json object, false for array of transaction ids"},
                },
                {
                    RPCResult{"for verbose = false",
                        RPCResult::Type::ARR, "", "",
                        {{RPCResult::Type::STR_HEX, "", "The transaction id of an in-mempool ancestor transaction"}}},
                    RPCResult{"for verbose = true",
                        RPCResult::Type::OBJ_DYN, "transactionid", "", MempoolEntryDescription()},
                },
                RPCExamples{
                    HelpExampleCli("getmempoolancestors", "\"mytxid\"")
            + HelpExampleRpc("getmempoolancestors", "\"mytxid\"")
                },
            }.Check(request);
    bool fVerbose = false;
    if (!request.params[1].isNull())
        fVerbose = request.params[1].get_bool();