Application hangs when emit signal on Linux in g_main_context_wakeup

    QMutexLocker locker(&d->mutex);
    ...

    locker.relock();
    d->terminated = false;

    QAbstractEventDispatcher *eventDispatcher = d->data->eventDispatcher;
    if (eventDispatcher) {
        d->data->eventDispatcher = 0;
        locker.unlock();
        eventDispatcher->closingDown();
        delete eventDispatcher;
        locker.relock();
    }

    ...
    if (data->eventDispatcher)
        data->eventDispatcher->wakeUp();

void QEventLoop::wakeUp()
{
    Q_D(QEventLoop);
    if (!d->threadData->eventDispatcher)
        return;
    d->threadData->eventDispatcher->wakeUp();
}

    if (eventsMoved > 0 && targetData->eventDispatcher) {
        targetData->canWait = false;
        targetData->eventDispatcher->wakeUp();
    }