crash when clicking sha1 in git log view

#0  0x00007f83106d3a49 in QVariant::QVariant(QString const&) ()
   from /home/kamm/qtcreator-2.4.81/bin/../lib/libQtCore.so.4
#1  0x00007f82fa9823d4 in VCSBase::VCSBaseEditorParameterWidget::mapSetting(QComboBox*, QString*) () from /home/kamm/qtcreator-2.4.81/lib/qtcreator/plugins/Nokia/libVCSBase.so
#2  0x00007f82f4fbf1ae in ?? ()
   from /home/kamm/qtcreator-2.4.81/lib/qtcreator/plugins/Nokia/libScmGit.so
#3  0x00007f82f4faaddc in ?? ()
   from /home/kamm/qtcreator-2.4.81/lib/qtcreator/plugins/Nokia/libScmGit.so
#4  0x00007f82f4ff4bed in ?? ()
   from /home/kamm/qtcreator-2.4.81/lib/qtcreator/plugins/Nokia/libScmGit.so
#5  0x00007f83106c82f8 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**)
    () from /home/kamm/qtcreator-2.4.81/bin/../lib/libQtCore.so.4
#6  0x00007f82fa9846e7 in VCSBase::VCSBaseEditorWidget::describeRequested(QString const&, QString const&) ()
   from /home/kamm/qtcreator-2.4.81/lib/qtcreator/plugins/Nokia/libVCSBase.so
#7  0x00007f82fa957557 in VCSBase::VCSBaseEditorWidget::mouseReleaseEvent(QMouseEvent*) ()
   from /home/kamm/qtcreator-2.4.81/lib/qtcreator/plugins/Nokia/libVCSBase.so
#8  0x00007f8310fe8fcb in QWidget::event(QEvent*) ()
   from /home/kamm/qtcreator-2.4.81/bin/../lib/libQtGui.so.4
#9  0x00007f83113f293b in QFrame::event(QEvent*) ()
   from /home/kamm/qtcreator-2.4.81/bin/../lib/libQtGui.so.4
#10 0x00007f8311482267 in QAbstractScrollArea::viewportEvent(QEvent*) ()
   from /home/kamm/qtcreator-2.4.81/bin/../lib/libQtGui.so.4
#11 0x00007f82ff23fa1d in TextEditor::BaseTextEditorWidget::viewportEvent(QEvent*) ()
   from /home/kamm/qtcreator-2.4.81/lib/qtcreator/plugins/Nokia/libTextEditor.so
#12 0x00007f8311484398 in ?? () from /home/kamm/qtcreator-2.4.81/bin/../lib/libQtGui.so.4
#13 0x00007f83106b24ce in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /home/kamm/qtcreator-2.4.81/bin/../lib/libQtCore.so.4
#14 0x00007f8310f8d520 in QApplicationPrivate::notify_helper(QObject*, QEvent*) ()
   from /home/kamm/qtcreator-2.4.81/bin/../lib/libQtGui.so.4
#15 0x00007f8310f95c6e in QApplication::notify(QObject*, QEvent*) ()
   from /home/kamm/qtcreator-2.4.81/bin/../lib/libQtGui.so.4
#16 0x00007f83106b2124 in QCoreApplication::notifyInternal(QObject*, QEvent*) ()
   from /home/kamm/qtcreator-2.4.81/bin/../lib/libQtCore.so.4
#17 0x00007f8310f905a7 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer<QWidget>&, bool) ()
   from /home/kamm/qtcreator-2.4.81/bin/../lib/libQtGui.so.4
#18 0x00007f831101661d in ?? () from /home/kamm/qtcreator-2.4.81/bin/../lib/libQtGui.so.4
#19 0x00007f83110157e6 in QApplication::x11ProcessEvent(_XEvent*) ()
   from /home/kamm/qtcreator-2.4.81/bin/../lib/libQtGui.so.4
#20 0x00007f8311040778 in ?? () from /home/kamm/qtcreator-2.4.81/bin/../lib/libQtGui.so.4
#21 0x00007f830ef06bcd in g_main_context_dispatch ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#22 0x00007f830ef073a8 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#23 0x00007f830ef07639 in g_main_context_iteration ()
   from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#24 0x00007f83106dfd2c in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /home/kamm/qtcreator-2.4.81/bin/../lib/libQtCore.so.4
#25 0x00007f831104030f in ?? () from /home/kamm/qtcreator-2.4.81/bin/../lib/libQtGui.so.4
#26 0x00007f83106b1475 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>)
    () from /home/kamm/qtcreator-2.4.81/bin/../lib/libQtCore.so.4
#27 0x00007f83106b16c6 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /home/kamm/qtcreator-2.4.81/bin/../lib/libQtCore.so.4
#28 0x00007f83106b3504 in QCoreApplication::exec() ()