Missing libdbus-1.so library, results in a crash at application start

QDBusConnection QDBusConnection::connectToBus(BusType type, const QString &name)
{
//    Q_ASSERT_X(QCoreApplication::instance(), "QDBusConnection::addConnection",
//               "Cannot create connection without a Q[Core]Application instance");
    if (!qdbus_loadLibDBus()) {
        QDBusConnectionPrivate *d = 0;
        return QDBusConnection(d);
    }

DBusConnection::DBusConnection(QObject *parent)
    : QObject(parent), m_a11yConnection(QString()), m_enabled(false)
{
    // Start monitoring if "org.a11y.Bus" is registered as DBus service.
    QDBusConnection c = QDBusConnection::sessionBus();
    dbusWatcher = new QDBusServiceWatcher(A11Y_SERVICE, c, QDBusServiceWatcher::WatchForRegistration, this);
    connect(dbusWatcher, SIGNAL(serviceRegistered(QString)), this, SLOT(serviceRegistered()));

    // If it is registered already, setup a11y right away
    if (c.interface()->isServiceRegistered(A11Y_SERVICE)) // <--------- HERE
        serviceRegistered();
}

Program received signal SIGSEGV, Segmentation fault.
0xf631306e in QT::QScopedPointer<QT::QObjectData, QT::QScopedPointerDeleter<QT::QObjectData> >::data (this=0x4) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:135
135	        return d;
(gdb) bt
#0  0xf631306e in QT::QScopedPointer<QT::QObjectData, QT::QScopedPointerDeleter<QT::QObjectData> >::data (this=0x4) at ../../include/QtCore/../../src/corelib/tools/qscopedpointer.h:135
#1  0xf6312953 in QT::qGetPtrHelper<QT::QScopedPointer<QT::QObjectData, QT::QScopedPointerDeleter<QT::QObjectData> > > (p=...) at ../../include/QtCore/../../src/corelib/global/qglobal.h:983
#2  0xf6312c26 in QT::QDBusAbstractInterface::d_func (this=0x0) at qdbusabstractinterface.h:148
Python Exception <type 'exceptions.AttributeError'> 'gdb.Type' object has no attribute 'name': 
#3  0xf631190f in QT::QDBusAbstractInterface::callWithArgumentList (this=0x0, mode=QT::QDBus::AutoDetect, method="NameHasOwner", args=) at qdbusabstractinterface.cpp:439
Python Exception <type 'exceptions.AttributeError'> 'gdb.Type' object has no attribute 'name': 
#4  0xf6312792 in QT::QDBusAbstractInterface::internalConstCall (this=0x0, mode=QT::QDBus::AutoDetect, method="NameHasOwner", args=) at qdbusabstractinterface.cpp:816
#5  0xf62f069e in QT::QDBusConnectionInterface::isServiceRegistered (this=0x0, serviceName="org.a11y.Bus") at qdbusconnectioninterface.cpp:202
#6  0xf655d65a in QT::DBusConnection::DBusConnection (this=0x80a34f8, parent=0x0) at linuxaccessibility/dbusconnection.cpp:66
#7  0xf6550f2a in QT::QSpiAccessibleBridge::QSpiAccessibleBridge (this=0x818b4c8) at linuxaccessibility/bridge.cpp:60
#8  0xf64b8f31 in QT::QXcbIntegration::accessibility (this=0x8061070) at qxcbintegration.cpp:316
#9  0xf74f9e0c in QT::platformAccessibility () at accessible/qaccessible.cpp:480
#10 0xf74fa599 in QT::QAccessible::isActive () at accessible/qaccessible.cpp:783
#11 0xf74fa6a9 in QT::QAccessible::updateAccessibility (event=0xffffbe50) at accessible/qaccessible.cpp:850
#12 0xf7bae778 in QT::QAbstractButton::setText (this=0x8182de8, text="New") at widgets/qabstractbutton.cpp:650
#13 0xf7ca7d73 in QT::QToolButton::setDefaultAction (this=0x8182de8, action=0x81bf2d8) at widgets/qtoolbutton.cpp:905
#14 0xf7ca1698 in QT::QToolBarLayout::createItem (this=0x80a15f0, action=0x81bf2d8) at widgets/qtoolbarlayout.cpp:728
#15 0xf7c9f416 in QT::QToolBarLayout::insertAction (this=0x80a15f0, index=0, action=0x81bf2d8) at widgets/qtoolbarlayout.cpp:194
#16 0xf7c9ce50 in QT::QToolBar::actionEvent (this=0x81c34b0, event=0xffffc728) at widgets/qtoolbar.cpp:931
#17 0xf7aae963 in QT::QWidget::event (this=0x81c34b0, event=0xffffc728) at kernel/qwidget.cpp:9044
#18 0xf7c9d719 in QT::QToolBar::event (this=0x81c34b0, event=0xffffc728) at widgets/qtoolbar.cpp:1144
#19 0xf7a5f71e in QT::QApplicationPrivate::notify_helper (this=0x8056458, receiver=0x81c34b0, e=0xffffc728) at kernel/qapplication.cpp:3716
#20 0xf7a5f595 in QT::QApplication::notify (this=0xffffc8a0, receiver=0x81c34b0, e=0xffffc728) at kernel/qapplication.cpp:3681
#21 0xf707046d in QT::QCoreApplication::notifyInternal (this=0xffffc8a0, receiver=0x81c34b0, event=0xffffc728) at kernel/qcoreapplication.cpp:965
#22 0xf7a4fc6b in QT::QCoreApplication::sendEvent (receiver=0x81c34b0, event=0xffffc728) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:224
#23 0xf7a9fbaf in QT::QWidget::insertAction (this=0x81c34b0, before=0x0, action=0x81bf2d8) at kernel/qwidget.cpp:3283
#24 0xf7a9f9ec in QT::QWidget::addAction (this=0x81c34b0, action=0x81bf2d8) at kernel/qwidget.cpp:3234
#25 0x0804e27a in MainWindow::createToolBars (this=0xffffc83c) at mainwindow.cpp:273
#26 0x0804c613 in MainWindow::MainWindow (this=0xffffc83c) at mainwindow.cpp:56
#27 0x0804c1f9 in main (argc=1, argv=0xffffc964) at main.cpp:53