ASSERT failure in QVector::operator[]: "index out of range", file /home/antonio/Qt5.4.0/5.4/gcc_64/include/QtCore/qvector.h, line 396 Program received signal SIGABRT, Aborted. 0x00007fffeeacccc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56 56 ../nptl/sysdeps/unix/sysv/linux/raise.c: No such file or directory. (gdb) bt #0 0x00007fffeeacccc9 in __GI_raise (sig=sig@entry=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:56 #1 0x00007fffeead00d8 in __GI_abort () at abort.c:89 #2 0x00007ffff60f6b76 in QMessageLogger::fatal(char const*, ...) const () from /home/antonio/Qt5.4.0/5.4/gcc_64/lib/libQt5Core.so.5 #3 0x00007ffff60f17fe in qt_assert_x(char const*, char const*, char const*, int) () from /home/antonio/Qt5.4.0/5.4/gcc_64/lib/libQt5Core.so.5 #4 0x0000000000a546f9 in QVector::operator[] (this=0x6170000eca48, i=0) at /home/antonio/Qt5.4.0/5.4/gcc_64/include/QtCore/qvector.h:396 #5 0x00000000011e5e7e in Ms::ScoreView::editElementDragTransition (this=0x6170000ec800, ev=0x60b00034f3b0) at /home/antonio/MuseScore/mscore/editelement.cpp:153 #6 0x0000000000a50f73 in Ms::EditDragEditTransition::eventTest (this=0x603000761b00, event=0x604000cbe290) at /home/antonio/MuseScore/mscore/scoreview.cpp:358 #7 0x00007ffff63a9589 in QStateMachinePrivate::selectTransitions(QEvent*) const () from /home/antonio/Qt5.4.0/5.4/gcc_64/lib/libQt5Core.so.5 #8 0x00007ffff63adadc in QStateMachinePrivate::_q_process() () from /home/antonio/Qt5.4.0/5.4/gcc_64/lib/libQt5Core.so.5 #9 0x00007ffff63afb4d in QStateMachinePrivate::handleFilteredEvent(QObject*, QEvent*) () from /home/antonio/Qt5.4.0/5.4/gcc_64/lib/libQt5Core.so.5 #10 0x00007ffff63afbfd in QStateMachine::eventFilter(QObject*, QEvent*) () from /home/antonio/Qt5.4.0/5.4/gcc_64/lib/libQt5Core.so.5 #11 0x00007ffff633ceed in QCoreApplicationPrivate::sendThroughObjectEventFilters(QObject*, QEvent*) () from /home/antonio/Qt5.4.0/5.4/gcc_64/lib/libQt5Core.so.5 #12 0x00007ffff37928bf in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /home/antonio/Qt5.4.0/5.4/gcc_64/lib/libQt5Widgets.so.5 #13 0x00007ffff3796071 in QApplication::notify(QObject*, QEvent*) () from /home/antonio/Qt5.4.0/5.4/gcc_64/lib/libQt5Widgets.so.5 #14 0x00007ffff633cc84 in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /home/antonio/Qt5.4.0/5.4/gcc_64/lib/libQt5Core.so.5 #15 0x00007ffff3794f88 in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer&, bool) () from /home/antonio/Qt5.4.0/5.4/gcc_64/lib/libQt5Widgets.so.5 #16 0x00007ffff37e9387 in ?? () from /home/antonio/Qt5.4.0/5.4/gcc_64/lib/libQt5Widgets.so.5 #17 0x00007ffff37ebe78 in ?? () from /home/antonio/Qt5.4.0/5.4/gcc_64/lib/libQt5Widgets.so.5 #18 0x00007ffff37928f4 in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /home/antonio/Qt5.4.0/5.4/gcc_64/lib/libQt5Widgets.so.5 #19 0x00007ffff3796506 in QApplication::notify(QObject*, QEvent*) () from /home/antonio/Qt5.4.0/5.4/gcc_64/lib/libQt5Widgets.so.5 #20 0x00007ffff633cc84 in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /home/antonio/Qt5.4.0/5.4/gcc_64/lib/libQt5Core.so.5 #21 0x00007ffff59d31d7 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () from /home/antonio/Qt5.4.0/5.4/gcc_64/lib/libQt5Gui.so.5 #22 0x00007ffff59d3c65 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () from /home/antonio/Qt5.4.0/5.4/gcc_64/lib/libQt5Gui.so.5 #23 0x00007ffff59b8a88 in QWindowSystemInterface::sendWindowSystemEvents(QFlags) () from /home/antonio/Qt5.4.0/5.4/gcc_64/lib/libQt5Gui.so.5 #24 0x00007fffe3529be0 in ?? () from /home/antonio/Qt5.4.0/5.4/gcc_64/plugins/platforms/libqxcb.so #25 0x00007fffed0bfe04 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #26 0x00007fffed0c0048 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #27 0x00007fffed0c00ec in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 #28 0x00007ffff6397554 in QEventDispatcherGlib::processEvents(QFlags) () from /home/antonio/Qt5.4.0/5.4/gcc_64/lib/libQt5Core.so.5 #29 0x00007ffff633aeab in QEventLoop::exec(QFlags) () from /home/antonio/Qt5.4.0/5.4/gcc_64/lib/libQt5Core.so.5 #30 0x00007ffff633fdc5 in QCoreApplication::exec() () from /home/antonio/Qt5.4.0/5.4/gcc_64/lib/libQt5Core.so.5 #31 0x0000000000c949f6 in main (argc=2, av=0x7fffffffdfc8) at /home/antonio/MuseScore/mscore/musescore.cpp:4935