MuseScore::cmd --undo index 1 ASSERT failure in QList::operator[]: "index out of range", file /opt/Qt5.1.1/5.1.1/gcc_64/include/QtCore/qlist.h, line 460 Program received signal SIGABRT, Aborted. 0x00007fffedeed425 in raise () from /lib/x86_64-linux-gnu/libc.so.6 (gdb) bt #0 0x00007fffedeed425 in raise () from /lib/x86_64-linux-gnu/libc.so.6 #1 0x00007fffedef0b8b in abort () from /lib/x86_64-linux-gnu/libc.so.6 #2 0x00007ffff40e768e in QMessageLogger::fatal(char const*, ...) const () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Core.so.5 #3 0x00007ffff40e4484 in qt_assert_x(char const*, char const*, char const*, int) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Core.so.5 #4 0x0000000000925248 in QList::operator[] (this=0x602600196650, i=4) at /opt/Qt5.1.1/5.1.1/gcc_64/include/QtCore/qlist.h:460 #5 0x00000000011d6813 in Ms::Segment::add (this=0x602600196540, el=0x602800147340) at /home/antonio/MuseScore/libmscore/segment.cpp:457 #6 0x000000000113633a in Ms::Score::createMMRests (this=0x604600030280) at /home/antonio/MuseScore/libmscore/layout.cpp:955 #7 0x0000000001133688 in Ms::Score::doLayout (this=0x604600030280) at /home/antonio/MuseScore/libmscore/layout.cpp:628 #8 0x00000000012a5062 in Ms::Score::endUndoRedo (this=0x6046000cd400) at /home/antonio/MuseScore/libmscore/cmd.cpp:191 #9 0x0000000000ac1331 in Ms::MuseScore::undo (this=0x6042001d5280) at /home/antonio/MuseScore/mscore/musescore.cpp:2907 #10 0x0000000000acaaa2 in Ms::MuseScore::cmd (this=0x6042001d5280, a=0x600400198770, cmd=...) at /home/antonio/MuseScore/mscore/musescore.cpp:3991 #11 0x0000000000ac9720 in Ms::MuseScore::cmd (this=0x6042001d5280, a=0x600400198770) at /home/antonio/MuseScore/mscore/musescore.cpp:3845 #12 0x00000000008b0272 in Ms::MuseScore::qt_static_metacall (_o=0x6042001d5280, _c=QMetaObject::InvokeMetaMethod, _id=48, _a=0x7fffffffc3f0) at /home/antonio/MuseScore/build.debug/mscore/moc_musescore.cpp:813 #13 0x00007ffff42e6261 in QMetaObject::activate(QObject*, int, int, void**) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Core.so.5 #14 0x00007ffff24f44cf in QActionGroup::triggered(QAction*) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Widgets.so.5 #15 0x00007ffff24f4ca9 in ?? () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Widgets.so.5 #16 0x00007ffff42e6261 in QMetaObject::activate(QObject*, int, int, void**) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Core.so.5 #17 0x00007ffff24f0ba2 in QAction::triggered(bool) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Widgets.so.5 #18 0x00007ffff24f29d7 in QAction::activate(QAction::ActionEvent) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Widgets.so.5 #19 0x00007ffff25f8eb5 in ?? () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Widgets.so.5 #20 0x00007ffff25f9174 in QAbstractButton::mouseReleaseEvent(QMouseEvent*) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Widgets.so.5 #21 0x00007ffff26b7e7a in QToolButton::mouseReleaseEvent(QMouseEvent*) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Widgets.so.5 #22 0x00007ffff253286e in QWidget::event(QEvent*) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Widgets.so.5 #23 0x00007ffff26b8d10 in QToolButton::event(QEvent*) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Widgets.so.5 #24 0x00007ffff24fbb54 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Widgets.so.5 #25 0x00007ffff24fee39 in QApplication::notify(QObject*, QEvent*) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Widgets.so.5 #26 0x00007ffff42bedd4 in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Core.so.5 #27 0x00007ffff24fdfa8 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer&, bool) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Widgets.so.5 #28 0x00007ffff2551865 in ?? () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Widgets.so.5 #29 0x00007ffff2553a70 in ?? () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Widgets.so.5 #30 0x00007ffff24fbb54 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Widgets.so.5 #31 0x00007ffff24fefe6 in QApplication::notify(QObject*, QEvent*) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Widgets.so.5 #32 0x00007ffff42bedd4 in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Core.so.5 #33 0x00007ffff3ae801b in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Gui.so.5 #34 0x00007ffff3ae88ed in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Gui.so.5 #35 0x00007ffff3ad1a98 in QWindowSystemInterface::sendWindowSystemEventsImplementation(QFlags) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Gui.so.5 #36 0x00007fffe5361940 in ?? () from /opt/Qt5.1.1/5.1.1/gcc_64/plugins/platforms/libqxcb.so #37 0x00007fffec514d53 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #38 0x00007fffec5150a0 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #39 0x00007fffec515164 in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #40 0x00007ffff4309314 in QEventDispatcherGlib::processEvents(QFlags) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Core.so.5 #41 0x00007ffff42bdb6b in QEventLoop::exec(QFlags) () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Core.so.5 #42 0x00007ffff42c1bbe in QCoreApplication::exec() () from /opt/Qt5.1.1/5.1.1/gcc_64/lib/libQt5Core.so.5 #43 0x0000000000ad22f8 in main (argc=2, av=0x7fffffffe858) at /home/antonio/MuseScore/mscore/musescore.cpp:4916 (gdb) up 5 #5 0x00000000011d6813 in Ms::Segment::add (this=0x602600196540, el=0x602800147340) at /home/antonio/MuseScore/libmscore/segment.cpp:457 457 if (_elist[track]) { (gdb) info locals track = 4 __PRETTY_FUNCTION__ = "virtual void Ms::Segment::add(Ms::Element*)" (gdb) up #6 0x000000000113633a in Ms::Score::createMMRests (this=0x604600030280) at /home/antonio/MuseScore/libmscore/layout.cpp:955 955 s->add(r); (gdb) info locals r = 0x602800147340 track = 4 staffIdx = 1 mmr = 0x602c00052ec0 s = 0x602600196540 cs = 0x122c022 ::begin(QVariant*)+28> nm = 0x0 lm = 0x602c0004efc0 n = 32 len = {_numerator = 128, _denominator = 4} m = 0x602c0004b440