(gdb) continue Continuing. [New Thread 0x7f57d7089700 (LWP 6491)] Program received signal SIGSEGV, Segmentation fault. 0x00007f57fbe148b5 in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 (gdb) bt full #0 0x00007f57fbe148b5 in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 No symbol table info available. #1 0x00007f57fc8dbebd in QInputContext::sendEvent(QInputMethodEvent const&) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 No symbol table info available. #2 0x00007f57fc8dbe72 in QInputContext::sendEvent(QInputMethodEvent const&) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 No symbol table info available. #3 0x00007f57d7de88b1 in IBusInputContext::displayPreeditText(IBus::Pointer const&, unsigned int, bool) () from /usr/lib/x86_64-linux-gnu/qt4/plugins/inputmethods/libqtim-ibus.so No symbol table info available. #4 0x00007f57fbe28a58 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 No symbol table info available. #5 0x00007f57d7bcd264 in IBus::InputContext::updatePreeditText(IBus::Pointer const&, unsigned int, bool) () from /usr/lib/libibus-qt.so.1 No symbol table info available. #6 0x00007f57d7bc2a70 in IBus::InputContext::slotUpdatePreeditText(QDBusVariant const&, unsigned int, bool) () from /usr/lib/libibus-qt.so.1 No symbol table info available. #7 0x00007f57fbe28a58 in QMetaObject::activate(QObject*, QMetaObject const*, int, void**) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 No symbol table info available. #8 0x00007f57d7bcb854 in IBusInputContextProxy::UpdatePreeditText(QDBusVariant const&, unsigned int, bool) () from /usr/lib/libibus-qt.so.1 No symbol table info available. #9 0x00007f57d7bcc7d6 in ?? () from /usr/lib/libibus-qt.so.1 No symbol table info available. #10 0x00007f57d7bcd053 in IBusInputContextProxy::qt_metacall(QMetaObject::Call, int, void**) () from /usr/lib/libibus-qt.so.1 No symbol table info available. #11 0x00007f57e1321e36 in ?? () from /usr/lib/x86_64-linux-gnu/libQtDBus.so.4 No symbol table info available. #12 0x00007f57fbe2cdce in QObject::event(QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 No symbol table info available. #13 0x00007f57fc344dfc in QApplicationPrivate::notify_helper(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 No symbol table info available. #14 0x00007f57fc34b470 in QApplication::notify(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 No symbol table info available. #15 0x00007f57fbe148bd in QCoreApplication::notifyInternal(QObject*, QEvent*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 No symbol table info available. #16 0x00007f57fbe17e1f in QCoreApplicationPrivate::sendPostedEvents(QObject*, int, QThreadData*) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 No symbol table info available. #17 0x00007f57fbe42073 in ?? () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 No symbol table info available. #18 0x00007f57f5fc23b6 in g_main_context_dispatch () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #19 0x00007f57f5fc2708 in ?? () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #20 0x00007f57f5fc27ac in g_main_context_iteration () from /lib/x86_64-linux-gnu/libglib-2.0.so.0 No symbol table info available. #21 0x00007f57fbe41a55 in QEventDispatcherGlib::processEvents(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 No symbol table info available. #22 0x00007f57fc3e69d6 in ?? () from /usr/lib/x86_64-linux-gnu/libQtGui.so.4 No symbol table info available. #23 0x00007f57fbe135ef in QEventLoop::processEvents(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 No symbol table info available. #24 0x00007f57fbe138e5 in QEventLoop::exec(QFlags) () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 No symbol table info available. #25 0x00007f57fbe18e5b in QCoreApplication::exec() () from /usr/lib/x86_64-linux-gnu/libQtCore.so.4 No symbol table info available. #26 0x00007f57ffedaf67 in octave_start_gui (argc=1, argv=, start_gui=) at src/octave-gui.cc:192 gui_tr = qsci_tr = term = {static npos = , _M_dataplus = {> = {<__gnu_cxx::new_allocator> = {}, }, _M_p = 0xdc07f8 "xterm"}} w = { = {}, static staticMetaObject = { d = {superdata = 0x7f57fce19440 , stringdata = 0x7f57fff5c020 "main_window", data = 0x7f57fff5cae0 , extradata = 0x7f58001bd4c0 }}, static staticMetaObjectExtraData = {objects = 0x0, static_metacall = 0x7f57fff168f0 }, _workspace_model = 0xdca540, status_bar = 0xdd7350, command_window = 0xe41770, history_window = 0xe2dba0, file_browser_window = 0xe262e0, doc_browser_window = 0xe26210, editor_window = 0xf21de0, workspace_window = 0xfe3ef0, _release_notes_icon = {static null = {}, static shared_null = {ref = {_q_value = 7129}, alloc = 0, size = 0, data = 0x7f57fc17993a , clean = 0, simpletext = 0, righttoleft = 0, asciiCache = 0, capacity = 0, reserved = 0, array = {0}}, static shared_empty = { ref = {_q_value = 11}, alloc = 0, size = 0, data = 0x7f57fc17991a , clean = 0, simpletext = 0, righttoleft = 0, asciiCache = 0, capacity = 0, reserved = 0, array = {0}}, d = 0xde5ef0, static codecForCStrings = 0xd55720}, _main_tool_bar = 0x1027d70, _warning_bar = 0x7f58003f0558, _gui_info_button = 0xfbc5d0, _debug_menu = 0x1006030, _debug_continue = 0x100c850, _debug_step_into = 0x1003e60, _debug_step_over = 0x1006150, _debug_step_out = 0x100ae90, _debug_quit = 0x100f410, _new_script_action = 0xff16d0, _new_function_action = 0xff17d0, _open_action = 0xff1810, _copy_action = 0xfb1ef0, _paste_action = 0xffcc70, _clear_clipboard_action = 0xffcc90, _undo_action = 0xff87f0, _find_files_action = 0xfa9db0, _exit_action = 0xff7e90, _current_directory_combo_box = 0xff0a30, static current_directory_width = 300, static current_directory_max_visible = 16, static current_directory_max_count = 16, _current_directory_line_edit = 0x0, find_files_dlg = 0x0, release_notes_window = 0x0, community_news_window = 0x0, _octave_qt_link = 0xfc74b0, _clipboard = 0x1005d80, _closing = false, _cmd_queue = 0xf84770, _cmd_processing = { d = 0xfe1f30}, _cmd_queue_mutex = {d = 0xfe20a0}, _dbg_queue = 0xfe20d0, _dbg_processing = {d = 0xfe20f0}, _dbg_queue_mutex = {d = 0xfe2780}} application = qt_tr = #27 0x00007f57fe6b3de5 in __libc_start_main (main= 0x400890 , argc=1, ubp_av=0x7fffbb2613e8, init=, fini=, rtld_fini=, stack_end=0x7fffbb2613d8) at libc-start.c:260 result = unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -4559400142165928822, 4196598, 140736333222880, 0, 0, 4559533940476843146, 4473830815019537546}, mask_was_saved = 0}}, priv = {pad = { 0x0, 0x0, 0x4009e0 <__libc_csu_init>, 0x7fffbb2613e8}, data = { prev = 0x0, cleanup = 0x0, canceltype = 4196832}}} not_first_call = #28 0x000000000040091f in _start () No symbol table info available.