segfault

#0  0x00007ffff4298674 in ThreadWeaver::IdDecorator::~IdDecorator() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#1  0x00007ffff429e1b5 in ThreadWeaver::QObjectDecorator::~QObjectDecorator() () from /usr/lib/x86_64-linux-gnu/libKF5ThreadWeaver.so.5
#2  0x00007ffff5b9f778 in QObject::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#3  0x00007ffff6477b2c in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#4  0x00007ffff647d000 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#5  0x00007ffff5b6dc2b in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#6  0x00007ffff5b6fc9b in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#7  0x00007ffff5bc6843 in ?? () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#8  0x00007fffef39ec3d in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#9  0x00007fffef39ef20 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#10 0x00007fffef39efcc in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007ffff5bc6c57 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#12 0x00007ffff5b6b3e2 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQt5Core.so.5
#13 0x00007ffff66794b5 in QDialog::exec() () from /usr/lib/x86_64-linux-gnu/libQt5Widgets.so.5
#14 0x00007ffff0600a5c in KMessageBox::createKMessageBox(QDialog*, QDialogButtonBox*, QIcon const&, QString const&, QStringList const&, QString const&, bool*, QFlags<KMessageBox::Option>, QString const&, QMessageBox::Icon) () from /usr/lib/x86_64-linux-gnu/libKF5WidgetsAddons.so.5
#15 0x00007ffff0600d06 in KMessageBox::createKMessageBox(QDialog*, QDialogButtonBox*, QMessageBox::Icon, QString const&, QStringList const&, QString const&, bool*, QFlags<KMessageBox::Option>, QString const&) () from /usr/lib/x86_64-linux-gnu/libKF5WidgetsAddons.so.5
#16 0x00007ffff0601aea in ?? () from /usr/lib/x86_64-linux-gnu/libKF5WidgetsAddons.so.5
#17 0x00007ffff6e4e834 in App::handleFirstRun (this=0x7fffffffdda0) at /home/rishabh/amaroksrc2/src/amarok/src/App.cpp:624
#18 0x00007ffff6e4de7d in App::continueInit (this=0x7fffffffdda0) at /home/rishabh/amaroksrc2/src/amarok/src/App.cpp:504
#19 0x000000000040d8e8 in main (argc=1, argv=0x7fffffffdef8) at /home/rishabh/amaroksrc2/src/amarok/src/main.cpp:346