Run `src/qt/bitcoin-qt --disablewallet=1`. 
Quitting after any amount of time will result in `Segmentation fault: 11`

0.14.0 branch at 861cb0c83db0571c2863f6b6276314e115c266ee , osx 10.12.3, Qt5.8
unitDisplayControl->setOptionsModel(_clientModel->getOptionsModel());
        
        OptionsModel* optionsModel = _clientModel->getOptionsModel();
        if(optionsModel)
        {
            
            connect(optionsModel,SIGNAL(hideTrayIconChanged(bool)),this,SLOT(setTrayIconVisible(bool)));
        
            
            setTrayIconVisible(optionsModel->getHideTrayIcon());
        }
        modalOverlay->setKnownBestHeight(clientModel->getHeaderTipHeight(), QDateTime::fromTime_t(clientModel->getHeaderTipTime()));
    } else {
        
        toggleHideAction->setEnabled(false);
        if(trayIconMenu)
        {
            
            trayIconMenu->clear();
        }
        
        rpcConsole->setClientModel(nullptr);
#ifdef ENABLE_WALLET
        walletFrame->setClientModel(nullptr);
#endif 
        unitDisplayControl->setOptionsModel(nullptr);
    }
}
#ifdef ENABLE_WALLET
bool BitcoinGUI::addWallet(const QString& name, WalletModel *walletModel)