Program received signal SIGSEGV, Segmentation fault.
Score::undoChangePitch (this=0x11de0d0, note=0x6768590, pitch=67, tpc=15, line=-1) at /home/johan/Projects/MuseScore/libmscore/undo.cpp:372
372	            Note* n      = c->notes().at(noteIndex);
(gdb) bt
#0  Score::undoChangePitch (this=0x11de0d0, note=0x6768590, pitch=67, tpc=15, line=-1)
    at /home/johan/Projects/MuseScore/libmscore/undo.cpp:372
#1  0x000000000096cfbb in Score::upDown (this=0x11de0d0, up=false, mode=UP_DOWN_OCTAVE)
    at /home/johan/Projects/MuseScore/libmscore/cmd.cpp:1211
#2  0x00000000009714e4 in Score::cmd (this=0x11de0d0, a=0x180eef0) at /home/johan/Projects/MuseScore/libmscore/cmd.cpp:2009
#3  0x0000000000587abc in ScoreView::cmd (this=0x540bab0, a=0x180eef0) at /home/johan/Projects/MuseScore/mscore/scoreview.cpp:2992
#4  0x000000000066a146 in MuseScore::cmd (this=0x1780b30, a=0x180eef0, cmd=...) at /home/johan/Projects/MuseScore/mscore/musescore.cpp:4419
#5  0x000000000066a4c8 in MuseScore::cmd (this=0x1780b30, a=0x180eef0) at /home/johan/Projects/MuseScore/mscore/musescore.cpp:4055
#6  0x0000000000565561 in MuseScore::qt_static_metacall (_o=0x1780b30, _c=<optimized out>, _id=<optimized out>, _a=<optimized out>)
    at /home/johan/Projects/MuseScore/build.release/mscore/moc_musescore.cxx:583
#7  0x00007ffff3947281 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#8  0x00007ffff43e0c9f in QActionGroup::triggered(QAction*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#9  0x00007ffff43e0d27 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#10 0x00007ffff3947281 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#11 0x00007ffff43de132 in QAction::triggered(bool) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#12 0x00007ffff43de31f in QAction::activate(QAction::ActionEvent) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#13 0x00007ffff43de48f in QAction::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#14 0x00007ffff43e4894 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#15 0x00007ffff43e9713 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#16 0x00007ffff3932e9c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#17 0x00007ffff44168b9 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#18 0x00007ffff4417d8a in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#19 0x00007ffff43eaf92 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#20 0x00007ffff3932e9c in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#21 0x00007ffff4488c49 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#22 0x00007ffff44890bb in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#23 0x00007ffff4463637 in QApplication::x11ProcessEvent(_XEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#24 0x00007ffff448d0d2 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#25 0x00007fffefaa0d53 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#26 0x00007fffefaa10a0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#27 0x00007fffefaa1164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0
#28 0x00007ffff39623bf in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) ()
   from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#29 0x00007ffff448cd5e in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4
#30 0x00007ffff3931c82 in QEventLoop::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#31 0x00007ffff3931ed7 in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#32 0x00007ffff3936f67 in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4
#33 0x000000000055c456 in main (argc=1, av=<optimized out>) at /home/johan/Projects/MuseScore/mscore/musescore.cpp:2476
(gdb)