While rescanning  wenn i click File>open wallet  in time wenn mouse cursor touch "open wallet" item app just immediately crashed.
V0.18.0 
{
    overviewAction->setEnabled(enabled);
    sendCoinsAction->setEnabled(enabled);
    sendCoinsMenuAction->setEnabled(enabled);
    receiveCoinsAction->setEnabled(enabled);
    receiveCoinsMenuAction->setEnabled(enabled);
    historyAction->setEnabled(enabled);
    encryptWalletAction->setEnabled(enabled);
    backupWalletAction->setEnabled(enabled);
    changePassphraseAction->setEnabled(enabled);
    signMessageAction->setEnabled(enabled);
    verifyMessageAction->setEnabled(enabled);
    usedSendingAddressesAction->setEnabled(enabled);
    usedReceivingAddressesAction->setEnabled(enabled);
    openAction->setEnabled(enabled);
    m_close_wallet_action->setEnabled(enabled);
}
void BitcoinGUI::createTrayIcon()
{
    assert(QSystemTrayIcon::isSystemTrayAvailable());
#ifndef Q_OS_MAC
    if (QSystemTrayIcon::isSystemTrayAvailable()) {
        trayIcon = new QSystemTrayIcon(m_network_style->getTrayAndWindowIcon(), this);
        QString toolTip = tr("%1 client").arg(tr(PACKAGE_NAME)) + " " + m_network_style->getTitleAddText();
        trayIcon->setToolTip(toolTip);
    }
#endif
}
void BitcoinGUI::createTrayIconMenu()