Bug 321184

If you eject a cd after playing tracks from it and then select edit track details including some cd tracks (I was trying to see the length of a subset of the playlist) amarok will crash.

- Insert cd
- Add cd tracks to playlist (with other tracks)
- play cd and after completion
- eject cd (from within amarok) tracks don't grey out
- select tracks including a cd track
- try to select 'edit track details' (from mouse menu)
- amarok will immediately crash

Repeatable - here's the relevant bit of the traceback

Thread 1 (Thread 0xaeb5a740 (LWP 28822)):
[KCrash Handler]
#7  0x00000000 in ?? ()
#8  0xb702cf3d in TagDialog::getTagsFromTrack (this=this@entry=0xc509c78, track=...) at ../../src/dialogs/TagDialog.cpp:957
#9  0xb702da88 in TagDialog::addTrack (this=0xc509c78, track=...) at ../../src/dialogs/TagDialog.cpp:154
#10 0xb7038a49 in TagDialog::TagDialog (this=0xc509c78, tracks=..., parent=0xe36ac00) at ../../src/dialogs/TagDialog.cpp:71
#11 0xb6c4c6da in Playlist::PrettyListView::editTrackInformation (this=0xad399d8) at ../../src/playlist/view/listview/PrettyListView.cpp:164
#12 0xb6c4e53b in qt_static_metacall (_a=0xbfbb7c08, _id=2, _o=0xad399d8, _c=<optimized out>) at ./PrettyListView.moc:108
#13 Playlist::PrettyListView::qt_static_metacall (_o=0xad399d8, _c=QMetaObject::InvokeMetaMethod, _id=2, _a=0xbfbb7c08) at ./PrettyListView.moc:100
#14 0xb59cbb56 in QMetaObject::activate (sender=sender@entry=0xb9c7390, m=m@entry=0xb689e398 <QAction::staticMetaObject>, local_signal_index=local_signal_index@entry=1, argv=argv@entry=0xbfbb7c08) at kernel/qobject.cpp:3539
#15 0xb5f214cd in QAction::triggered (this=this@entry=0xb9c7390, _t1=false) at .moc/release-shared/moc_qaction.cpp:277
#16 0xb5f22a7c in QAction::activate (this=this@entry=0xb9c7390, event=event@entry=QAction::Trigger) at kernel/qaction.cpp:1257
#17 0xb63d42e5 in QMenuPrivate::activateCausedStack (this=0xf178c90, causedStack=..., action=0xb9c7390, action_e=QAction::Trigger, self=true) at widgets/qmenu.cpp:1038
#18 0xb63da136 in QMenuPrivate::activateAction (this=0xf178c90, action=0xb9c7390, action_e=QAction::Trigger, self=self@entry=true) at widgets/qmenu.cpp:1130
#19 0xb63de225 in QMenu::mouseReleaseEvent (this=this@entry=0xf05f918, e=e@entry=0xbfbb8484) at widgets/qmenu.cpp:2372
#20 0xb7621bbc in KMenu::mouseReleaseEvent (this=0xf05f918, e=0xbfbb8484) at ../../kdeui/widgets/kmenu.cpp:464
#21 0xb5f7f710 in QWidget::event (this=0xf05f918, event=0xbfbb8484) at kernel/qwidget.cpp:8375
#22 0xb63dbcdc in QMenu::event (this=0xf05f918, e=0xbfbb8484) at widgets/qmenu.cpp:2481
#23 0xb5f28c7c in QApplicationPrivate::notify_helper (this=0x9e197e8, receiver=0xf05f918, e=0xbfbb8484) at kernel/qapplication.cpp:4567
#24 0xb5f2c587 in QApplication::notify (this=0x9e197e8, receiver=0xf05f918, e=0xbfbb8484) at kernel/qapplication.cpp:4110
#25 0xb754bd01 in KApplication::notify (this=0xbfbba50c, receiver=0xf05f918, event=0xbfbb8484) at ../../kdeui/kernel/kapplication.cpp:311
#26 0xb59b590e in QCoreApplication::notifyInternal (this=0xbfbba50c, receiver=receiver@entry=0xf05f918, event=event@entry=0xbfbb8484) at kernel/qcoreapplication.cpp:946
#27 0xb5f2f823 in sendEvent (event=<optimized out>, receiver=<optimized out>) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:231
#28 QApplicationPrivate::sendMouseEvent (receiver=receiver@entry=0xf05f918, event=event@entry=0xbfbb8484, alienWidget=0x0, nativeWidget=nativeWidget@entry=0xf05f918, buttonDown=buttonDown@entry=0xb68bbd14 <qt_button_down>, lastMouseReceiver=..., spontaneous=spontaneous@entry=true) at kernel/qapplication.cpp:3178
#29 0xb5fb162f in QETWidget::translateMouseEvent (this=0xf05f918, event=0xbfbb88ac) at kernel/qapplication_x11.cpp:4565
#30 0xb5fb0575 in QApplication::x11ProcessEvent (this=0xbfbba50c, event=0xbfbb88ac) at kernel/qapplication_x11.cpp:3746
#31 0xb5fdf954 in x11EventSourceDispatch (s=0x9e20e00, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#32 0xb43e53b3 in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#33 0xb43e5750 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#34 0xb43e5831 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#35 0xb59e7c21 in QEventDispatcherGlib::processEvents (this=this@entry=0x9cb0eb8, flags=...) at kernel/qeventdispatcher_glib.cpp:424
#36 0xb5fdfa5a in QGuiEventDispatcherGlib::processEvents (this=0x9cb0eb8, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#37 0xb59b43ec in QEventLoop::processEvents (this=this@entry=0xbfbb8b98, flags=...) at kernel/qeventloop.cpp:149
#38 0xb59b46e1 in QEventLoop::exec (this=this@entry=0xbfbb8b98, flags=...) at kernel/qeventloop.cpp:204
#39 0xb63d8fd7 in QMenu::exec (this=0xf05f918, p=..., action=0x0) at widgets/qmenu.cpp:2125
#40 0xb6c34747 in Playlist::ViewCommon::trackMenu (this=0xad399ec, parent=0xad399d8, index=0xbfbb8c68, pos=...) at ../../src/playlist/view/PlaylistViewCommon.cpp:74
#41 0xb6c48056 in Playlist::PrettyListView::contextMenuEvent (this=0xad399ec, event=0xbfbb9450) at ../../src/playlist/view/listview/PrettyListView.cpp:411
#42 0xb5f7fd63 in QWidget::event (this=0xad399d8, event=0xbfbb9450) at kernel/qwidget.cpp:8553
#43 0xb63932f5 in QFrame::event (this=this@entry=0xad399d8, e=e@entry=0xbfbb9450) at widgets/qframe.cpp:557
#44 0xb6426013 in QAbstractScrollArea::viewportEvent (this=0xad399d8, e=0xbfbb9450) at widgets/qabstractscrollarea.cpp:1043
#45 0xb64cfedc in QAbstractItemView::viewportEvent (this=0xad399d8, event=0xbfbb9450) at itemviews/qabstractitemview.cpp:1644
#46 0xb64264b6 in viewportEvent (event=0xbfbb9450, this=<optimized out>) at widgets/qabstractscrollarea_p.h:100
#47 QAbstractScrollAreaFilter::eventFilter (this=0xad3ab38, o=0xad39310, e=0xbfbb9450) at widgets/qabstractscrollarea_p.h:116
#48 0xb59b5a7e in QCoreApplicationPrivate::sendThroughObjectEventFilters (this=this@entry=0x9e197e8, receiver=receiver@entry=0xad39310, event=event@entry=0xbfbb9450) at kernel/qcoreapplication.cpp:1056
#49 0xb5f28c4d in QApplicationPrivate::notify_helper (this=0x9e197e8, receiver=0xad39310, e=0xbfbb9450) at kernel/qapplication.cpp:4563
#50 0xb5f2c79f in QApplication::notify (this=0xbfbb91d0, receiver=0xad39310, e=0xbfbb9450) at kernel/qapplication.cpp:4189
#51 0xb754bd01 in KApplication::notify (this=0xbfbba50c, receiver=0xad39310, event=0xbfbb9450) at ../../kdeui/kernel/kapplication.cpp:311
#52 0xb59b590e in QCoreApplication::notifyInternal (this=0xbfbba50c, receiver=receiver@entry=0xad39310, event=event@entry=0xbfbb9450) at kernel/qcoreapplication.cpp:946
#53 0xb5fb17f8 in sendSpontaneousEvent (event=0xbfbb9440, receiver=0xad39310) at ../../include/QtCore/../../src/corelib/kernel/qcoreapplication.h:234
#54 QETWidget::translateMouseEvent (this=0xad39310, event=0xbfbb989c) at kernel/qapplication_x11.cpp:4636
#55 0xb5fb0575 in QApplication::x11ProcessEvent (this=0xbfbba50c, event=0xbfbb989c) at kernel/qapplication_x11.cpp:3746
#56 0xb5fdf954 in x11EventSourceDispatch (s=0x9e20e00, callback=0x0, user_data=0x0) at kernel/qguieventdispatcher_glib.cpp:146
#57 0xb43e53b3 in g_main_context_dispatch () from /lib/i386-linux-gnu/libglib-2.0.so.0
#58 0xb43e5750 in ?? () from /lib/i386-linux-gnu/libglib-2.0.so.0
#59 0xb43e5831 in g_main_context_iteration () from /lib/i386-linux-gnu/libglib-2.0.so.0
#60 0xb59e7c3f in QEventDispatcherGlib::processEvents (this=this@entry=0x9cb0eb8, flags=...) at kernel/qeventdispatcher_glib.cpp:426
#61 0xb5fdfa5a in QGuiEventDispatcherGlib::processEvents (this=0x9cb0eb8, flags=...) at kernel/qguieventdispatcher_glib.cpp:204
#62 0xb59b43ec in QEventLoop::processEvents (this=this@entry=0xbfbb9b98, flags=...) at kernel/qeventloop.cpp:149
#63 0xb59b46e1 in QEventLoop::exec (this=this@entry=0xbfbb9b98, flags=...) at kernel/qeventloop.cpp:204
#64 0xb59ba3fa in QCoreApplication::exec () at kernel/qcoreapplication.cpp:1218
#65 0xb5f26fc4 in QApplication::exec () at kernel/qapplication.cpp:3828
#66 0x080500df in main (argc=1, argv=0xbfbba5f4) at ../../src/main.cpp:329