#0  Ms::Spanner::setStartElement(Ms::Element*) (this=0x55555d46c770, e=0x0) at .../MuseScore/libmscore/spanner.cpp:918
#1  0x0000555556a81e4b in Ms::ChangeStartEndSpanner::flip(Ms::EditData*) (this=0x55555d5ba490) at .../MuseScore/libmscore/undo.cpp:2533
#2  0x0000555556a77824 in Ms::UndoCommand::redo(Ms::EditData*) (this=0x55555d5ba490, ed=0x0) at .../MuseScore/libmscore/undo.cpp:166
#3  0x0000555556a781fa in Ms::UndoStack::push(Ms::UndoCommand*, Ms::EditData*) (this=0x555559f51360, cmd=0x55555d5ba490, ed=0x0) at .../MuseScore/libmscore/undo.cpp:308
#4  0x0000555556975005 in Ms::Score::undo(Ms::UndoCommand*, Ms::EditData*) const (this=0x55555a3ba320, cmd=0x55555d5ba490, ed=0x0) at .../MuseScore/libmscore/score.cpp:3762
#5  0x000055555698a88e in Ms::Segment::remove(Ms::Element*) (this=0x55555b023d60, el=0x55555d111aa0) at .../MuseScore/libmscore/segment.cpp:662
#6  0x000055555696a721 in Ms::Score::removeElement(Ms::Element*) (this=0x55555a3ba320, element=0x55555d111aa0) at .../MuseScore/libmscore/score.cpp:1519
#7  0x0000555556a7b039 in Ms::RemoveElement::redo(Ms::EditData*) (this=0x55555d3d28f0) at .../MuseScore/libmscore/undo.cpp:897
#8  0x0000555556a781fa in Ms::UndoStack::push(Ms::UndoCommand*, Ms::EditData*) (this=0x555559f51360, cmd=0x55555d3d28f0, ed=0x0) at .../MuseScore/libmscore/undo.cpp:308
#9  0x0000555556975005 in Ms::Score::undo(Ms::UndoCommand*, Ms::EditData*) const (this=0x55555a3ba320, cmd=0x55555d3d28f0, ed=0x0) at .../MuseScore/libmscore/score.cpp:3762
#10 0x000055555682ae39 in Ms::Score::undoRemoveElement(Ms::Element*) (this=0x55555a3ba320, element=0x55555d111aa0) at .../MuseScore/libmscore/edit.cpp:5126
#11 0x0000555556015075 in Ms::Score::makeGap(Ms::Segment*, int, Ms::Fraction const&, Ms::Tuplet*, bool) (this=0x55555a3ba320, segment=0x55555b023d60, track=0, _sd=..., tuplet=0x0, keepChord=false)
    at .../MuseScore/libmscore/cmd.cpp:978
#12 0x0000555556013a71 in Ms::Score::setNoteRest(Ms::Segment*, int, Ms::NoteVal, Ms::Fraction, Ms::Direction, bool, bool, Ms::InputState*)
    (this=0x55555a3ba320, segment=0x55555b023d60, track=0, nval=..., sd=..., stemDirection=Ms::Direction::AUTO, forceAccidental=false, rhythmic=false, externalInputState=0x0)
    at .../MuseScore/libmscore/cmd.cpp:730
#13 0x000055555683be08 in Ms::Score::addPitch(Ms::NoteVal&, bool, Ms::InputState*) (this=0x55555a3ba320, nval=..., addFlag=false, externalInputState=0x0)
    at .../MuseScore/libmscore/noteentry.cpp:245
#14 0x00005555568124e9 in Ms::Score::addMidiPitch(int, bool) (this=0x55555a3ba320, pitch=60, addFlag=false) at .../MuseScore/libmscore/edit.cpp:1013
#15 0x000055555601b2f0 in Ms::Score::processMidiInput() (this=0x55555a3ba320) at .../MuseScore/libmscore/cmd.cpp:2253
#16 0x000055555622fa77 in Ms::ScoreView::cmd(char const*) (this=0x55555a40ad90, s=0x0) at .../MuseScore/mscore/scoreview.cpp:2897
#17 0x0000555556238d78 in Ms::ScoreView::midiNoteReceived(int, bool, int) (this=0x55555a40ad90, pitch=60, chord=false, velocity=1) at .../MuseScore/mscore/scoreview.cpp:4453
#18 0x0000555555e21714 in Ms::MuseScore::midiNoteReceived(int, int, int) (this=0x5555596ce0f0, channel=0, pitch=60, velo=1) at .../MuseScore/mscore/musescore.cpp:3256
#19 0x0000555555ec325e in Ms::Seq::heartBeatTimeout() (this=0x5555589fa4f0) at .../MuseScore/mscore/seq.cpp:1609
#20 0x00005555561a4964 in Ms::Seq::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) (_o=0x5555589fa4f0, _c=QMetaObject::InvokeMetaMethod, _id=9, _a=0x7fffffffe390)
    at .../MuseScore/build.debug/mscore/mscoreapp_autogen/EWIEGA46WW/moc_seq.cpp:163
#21 0x00007fffeda78720 in  () at /usr/lib/libQt5Core.so.5
#22 0x00007fffeda7c6bb in QTimer::timeout(QTimer::QPrivateSignal) () at /usr/lib/libQt5Core.so.5
#23 0x00007fffeda6e3af in QObject::event(QEvent*) () at /usr/lib/libQt5Core.so.5
#24 0x00007ffff6dd9d62 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib/libQt5Widgets.so.5
#25 0x00007fffeda4133a in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib/libQt5Core.so.5
#26 0x00007fffeda992dd in QTimerInfoList::activateTimers() () at /usr/lib/libQt5Core.so.5
#27 0x00007fffeda99bda in  () at /usr/lib/libQt5Core.so.5
#28 0x00007fffea86610c in g_main_context_dispatch () at /usr/lib/libglib-2.0.so.0
#29 0x00007fffea8b9b99 in  () at /usr/lib/libglib-2.0.so.0
#30 0x00007fffea863871 in g_main_context_iteration () at /usr/lib/libglib-2.0.so.0
#31 0x00007fffeda99f66 in QEventDispatcherGlib::processEvents(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#32 0x00007fffeda3fcac in QEventLoop::exec(QFlags<QEventLoop::ProcessEventsFlag>) () at /usr/lib/libQt5Core.so.5
#33 0x00007fffeda48214 in QCoreApplication::exec() () at /usr/lib/libQt5Core.so.5
#34 0x0000555555e45486 in Ms::runApplication(int&, char**) (argc=@0x7fffffffe83c: 1, av=0x7fffffffe948) at .../MuseScore/mscore/musescore.cpp:7933
#35 0x0000555555e0513e in main(int, char**) (argc=1, argv=0x7fffffffe948) at .../MuseScore/main/main.cpp:95