(gdb) where #0 0x00007f4f2326b5f0 in QWidget::hasFocus() const () at /usr/lib64/../lib64/libQt5Widgets.so.5 #1 0x00007f4f255c357d in octave::documentation::copyClipboard() (this=0xde8c50) at ../libgui/src/documentation.cc:577 #2 0x00007f4f220f5d7f in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/../lib64/libQt5Core.so.5 #3 0x00007f4f255fe5d0 in octave::main_window::copyClipboard() (this=0xa29aa0) at ../libgui/src/main-window.cc:1406 #4 0x00007f4f2567d446 in octave::main_window::qt_static_metacall(QObject*, QMetaObject::Call, int, void**) (_o=0xa29aa0, _c=, _id=, _a=) at libgui/src/moc-main-window.cc:717 #5 0x00007f4f220f5d7f in QMetaObject::activate(QObject*, int, int, void**) () at /usr/lib64/../lib64/libQt5Core.so.5 #6 0x00007f4f2323eec2 in QAction::triggered(bool) () at /usr/lib64/../lib64/libQt5Widgets.so.5 #7 0x00007f4f232412d0 in QAction::activate(QAction::ActionEvent) () at /usr/lib64/../lib64/libQt5Widgets.so.5 #8 0x00007f4f233b112a in () at /usr/lib64/../lib64/libQt5Widgets.so.5 #9 0x00007f4f233b81a9 in () at /usr/lib64/../lib64/libQt5Widgets.so.5 #10 0x00007f4f233b90d0 in QMenu::mouseReleaseEvent(QMouseEvent*) () at /usr/lib64/../lib64/libQt5Widgets.so.5 #11 0x00007f4f23281358 in QWidget::event(QEvent*) () at /usr/lib64/../lib64/libQt5Widgets.so.5 #12 0x00007f4f233bb61b in QMenu::event(QEvent*) () at /usr/lib64/../lib64/libQt5Widgets.so.5 #13 0x00007f4f23244eec in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/../lib64/libQt5Widgets.so.5 #14 0x00007f4f2324ccd3 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/../lib64/libQt5Widgets.so.5 #15 0x00007f4f2560b72b in octave::octave_qapplication::notify(QObject*, QEvent*) (this=, receiver=, ev=) at ../libgui/src/main-window.cc:2795 #16 0x00007f4f220cfcca in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/../lib64/libQt5Core.so.5 #17 0x00007f4f2324b93f in QApplicationPrivate::sendMouseEvent(QWidget*, QMouseEvent*, QWidget*, QWidget*, QWidget**, QPointer&, bool) () at /usr/lib64/../lib64/libQt5Widgets.so.5 #18 0x00007f4f2329adc6 in () at /usr/lib64/../lib64/libQt5Widgets.so.5 #19 0x00007f4f2329d2fb in () at /usr/lib64/../lib64/libQt5Widgets.so.5 #20 0x00007f4f23244eec in QApplicationPrivate::notify_helper(QObject*, QEvent*) () at /usr/lib64/../lib64/libQt5Widgets.so.5 #21 0x00007f4f2324c2f7 in QApplication::notify(QObject*, QEvent*) () at /usr/lib64/../lib64/libQt5Widgets.so.5 #22 0x00007f4f2560b72b in octave::octave_qapplication::notify(QObject*, QEvent*) (this=, receiver=, ev=) at ../libgui/src/main-window.cc:2795 #23 0x00007f4f220cfcca in QCoreApplication::notifyInternal2(QObject*, QEvent*) () at /usr/lib64/../lib64/libQt5Core.so.5 #24 0x00007f4f22afda52 in QGuiApplicationPrivate::processMouseEvent(QWindowSystemInterfacePrivate::MouseEvent*) () at /usr/lib64/../lib64/libQt5Gui.so.5 #25 0x00007f4f22aff8c5 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) () at /usr/lib64/../lib64/libQt5Gui.so.5 #26 0x00007f4f22add04b in QWindowSystemInterface::sendWindowSystemEvents(QFlags) () at /usr/lib64/../lib64/libQt5Gui.so.5 #27 0x00007f4f09ba33c0 in () at /usr/lib64/qt5/plugins/platforms/../../../libQt5XcbQpa.so.5 #28 0x00007f4f1b462797 in g_main_context_dispatch () at /usr/lib64/../lib64/libglib-2.0.so.0 #29 0x00007f4f1b4629c8 in () at /usr/lib64/../lib64/libglib-2.0.so.0 #30 0x00007f4f1b462a6c in g_main_context_iteration () at /usr/lib64/../lib64/libglib-2.0.so.0 #31 0x00007f4f2211bd0f in QEventDispatcherGlib::processEvents(QFlags) () at /usr/lib64/../lib64/libQt5Core.so.5 #32 0x00007f4f220ceb4a in QEventLoop::exec(QFlags) () at /usr/lib64/../lib64/libQt5Core.so.5 #33 0x00007f4f220d6b04 in QCoreApplication::exec() () at /usr/lib64/../lib64/libQt5Core.so.5 #34 0x00007f4f25618d79 in octave::gui_application::execute() (this=this@entry=0x7fff7b3d8710) at ../libgui/src/octave-gui.cc:64 #35 0x0000000000401532 in main(int, char**) (argc=2, argv=0x7fff7b3d8948) at ../src/main-gui.cc:103 (gdb) up #1 0x00007f4f255c357d in octave::documentation::copyClipboard (this=0xde8c50) at ../libgui/src/documentation.cc:577 577 if (m_doc_browser->hasFocus ()) (gdb) print m_doc_browser $1 = (octave::documentation_browser *) 0x0