(gdb) bt #0 __memmove_avx_unaligned_erms () at ../sysdeps/x86_64/multiarch/memmove-vec-unaligned-erms.S:262 #1 0x00007ffff30cad4c in copy_unswapped(char*, int, QImage const&, QRect const&) (dst=0x7ffb9313f020 "\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377\357\357\357\377"..., dstBytesPerLine=262136, img=..., rect=...) at /home/liangqi/qt/qtbase-2/src/plugins/platforms/xcb/qxcbbackingstore.cpp:547 #2 0x00007ffff30caeae in native_sub_image(QByteArray*, int, QImage const&, QRect const&, bool) (buffer=0x5555559185b0, dstStride=262136, src=..., rect=..., swap=false) at /home/liangqi/qt/qtbase-2/src/plugins/platforms/xcb/qxcbbackingstore.cpp:590 #3 0x00007ffff30cb552 in QXcbBackingStoreImage::flushPixmap(QRegion const&, bool) (this=0x555555918530, region=..., fullRegion=true) at /home/liangqi/qt/qtbase-2/src/plugins/platforms/xcb/qxcbbackingstore.cpp:669 #4 0x00007ffff30cb288 in QXcbBackingStoreImage::flushPixmap(QRegion const&, bool) (this=0x555555918530, region=..., fullRegion=false) at /home/liangqi/qt/qtbase-2/src/plugins/platforms/xcb/qxcbbackingstore.cpp:627 #5 0x00007ffff30cbaaa in QXcbBackingStoreImage::put(unsigned int, QRegion const&, QPoint const&) (this=0x555555918530, dst=27262982, region=..., offset=...) at /home/liangqi/qt/qtbase-2/src/plugins/platforms/xcb/qxcbbackingstore.cpp:741 #6 0x00007ffff30cc694 in QXcbBackingStore::render(unsigned int, QRegion const&, QPoint const&) (this=0x7fffec007560, window=27262982, region=..., offset=...) at /home/liangqi/qt/qtbase-2/src/plugins/platforms/xcb/qxcbbackingstore.cpp:887 #7 0x00007ffff30cc5f0 in QXcbBackingStore::flush(QWindow*, QRegion const&, QPoint const&) (this=0x7fffec007560, window=0x5555564905a0, region=..., offset=...) at /home/liangqi/qt/qtbase-2/src/plugins/platforms/xcb/qxcbbackingstore.cpp:877 #8 0x00007ffff7048a4d in QBackingStore::flush(QRegion const&, QWindow*, QPoint const&) (this=0x7fffec007420, region=..., window=0x5555564905a0, offset=...) at /home/liangqi/qt/qtbase-2/src/gui/painting/qbackingstore.cpp:252 #9 0x00007ffff7810a70 in QWidgetRepaintManager::flush(QWidget*, QRegion const&, QPlatformTextureList*) (this=0x5555556fff90, widget=0x7fffffffdb50, region=..., widgetTextures=0x0) at /home/liangqi/qt/qtbase-2/src/widgets/kernel/qwidgetrepaintmanager.cpp:1184 #10 0x00007ffff7810193 in QWidgetRepaintManager::flush() (this=0x5555556fff90) at /home/liangqi/qt/qtbase-2/src/widgets/kernel/qwidgetrepaintmanager.cpp:1082 #11 0x00007ffff780f81b in QWidgetRepaintManager::paintAndFlush() (this=0x5555556fff90) at /home/liangqi/qt/qtbase-2/src/widgets/kernel/qwidgetrepaintmanager.cpp:1014 #12 0x00007ffff780e09e in QWidgetRepaintManager::sync(QWidget*, QRegion const&) (this=0x5555556fff90, exposedWidget=0x7fffffffdb50, exposedRegion=...) at /home/liangqi/qt/qtbase-2/src/widgets/kernel/qwidgetrepaintmanager.cpp:743 #13 0x00007ffff7839aa0 in QWidgetPrivate::syncBackingStore(QRegion const&) (this=0x555556411400, region=...) at /home/liangqi/qt/qtbase-2/src/widgets/kernel/qwidget.cpp:1765 #14 0x00007ffff7883d76 in QWidgetWindow::handleExposeEvent(QExposeEvent*) (this=0x5555564905a0, event=0x7fffffffd710) at /home/liangqi/qt/qtbase-2/src/widgets/kernel/qwidgetwindow.cpp:1031 #15 0x00007ffff788088b in QWidgetWindow::event(QEvent*) (this=0x5555564905a0, event=0x7fffffffd710) at /home/liangqi/qt/qtbase-2/src/widgets/kernel/qwidgetwindow.cpp:347 #16 0x00007ffff77ff34d in QApplicationPrivate::notify_helper(QObject*, QEvent*) (this=0x5555555741b0, receiver=0x5555564905a0, e=0x7fffffffd710) at /home/liangqi/qt/qtbase-2/src/widgets/kernel/qapplication.cpp:3637 #17 0x00007ffff77fc68e in QApplication::notify(QObject*, QEvent*) (this=0x7fffffffdb20, receiver=0x5555564905a0, e=0x7fffffffd710) at /home/liangqi/qt/qtbase-2/src/widgets/kernel/qapplication.cpp:2977 #18 0x00007ffff68856a9 in QCoreApplication::notifyInternal2(QObject*, QEvent*) (receiver=0x5555564905a0, event=0x7fffffffd710) at /home/liangqi/qt/qtbase-2/src/corelib/kernel/qcoreapplication.cpp:1064 #19 0x00007ffff6886184 in QCoreApplication::sendSpontaneousEvent(QObject*, QEvent*) (receiver=0x5555564905a0, event=0x7fffffffd710) at /home/liangqi/qt/qtbase-2/src/corelib/kernel/qcoreapplication.cpp:1474 #20 0x00007ffff6e13e1d in QGuiApplicationPrivate::processExposeEvent(QWindowSystemInterfacePrivate::ExposeEvent*) (e=0x5555563bf110) at /home/liangqi/qt/qtbase-2/src/gui/kernel/qguiapplication.cpp:3261 #21 0x00007ffff6e0ebb1 in QGuiApplicationPrivate::processWindowSystemEvent(QWindowSystemInterfacePrivate::WindowSystemEvent*) (e=0x5555563bf110) at /home/liangqi/qt/qtbase-2/src/gui/kernel/qguiapplication.cpp:2073 #22 0x00007ffff6deb2d7 in QWindowSystemInterface::sendWindowSystemEvents(QFlags) (flags=...) at /home/liangqi/qt/qtbase-2/src/gui/kernel/qwindowsysteminterface.cpp:1169 #23 0x00007ffff30e2840 in xcbSourceDispatch(GSource*, GSourceFunc, gpointer) (source=0x5555556cbae0) at /home/liangqi/qt/qtbase-2/src/plugins/platforms/xcb/qxcbeventdispatcher.cpp:105 #24 0x00007ffff573e17d in g_main_context_dispatch () at /lib/x86_64-linux-gnu/libglib-2.0.so.0 #25 0x00007ffff573e400 in () at /lib/x86_64-linux-gnu/libglib-2.0.so.0 #26 0x00007ffff573e4a3 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0 #27 0x00007ffff69243ab in QEventDispatcherGlib::processEvents(QFlags) (this=0x55555567cfa0, flags=...) at /home/liangqi/qt/qtbase-2/src/corelib/kernel/qeventdispatcher_glib.cpp:423 #28 0x00007ffff30e2a86 in QXcbGlibEventDispatcher::processEvents(QFlags) (this=0x55555567cfa0, flags=...) at /home/liangqi/qt/qtbase-2/src/plugins/platforms/xcb/qxcbeventdispatcher.cpp:143 #29 0x00007ffff6881b47 in QEventLoop::processEvents(QFlags) (this=0x7fffffffda90, flags=...) at /home/liangqi/qt/qtbase-2/src/corelib/kernel/qeventloop.cpp:139 #30 0x00007ffff6881ead in QEventLoop::exec(QFlags) (this=0x7fffffffda90, flags=...) at /home/liangqi/qt/qtbase-2/src/corelib/kernel/qeventloop.cpp:232 #31 0x00007ffff6885f78 in QCoreApplication::exec() () at /home/liangqi/qt/qtbase-2/src/corelib/kernel/qcoreapplication.cpp:1375 #32 0x00007ffff6e0e44e in QGuiApplication::exec() () at /home/liangqi/qt/qtbase-2/src/gui/kernel/qguiapplication.cpp:1870 #33 0x00007ffff77fc04f in QApplication::exec() () at /home/liangqi/qt/qtbase-2/src/widgets/kernel/qapplication.cpp:2829 #34 0x00005555555553bb in main(int, char**) (argc=1, argv=0x7fffffffdca8) at ../QTBUG-93067/main.cpp:13