. Thread 3 (Thread 0x7f1f32e9a700 (LWP 1633)): #0 0x00007f1f46227773 in __GI___poll (fds=, nfds=, timeout=) at ../sysdeps/unix/sysv/linux/poll.c:87 resultvar = oldtype = 0 result = #1 0x00007f1f47300f68 in g_main_context_poll (n_fds=3, fds=0x1f85c40, timeout=-1, context=0x1f85840, priority=) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3402 poll_func = 0x7f1f4730f4c0 #2 g_main_context_iterate (context=0x1f85840, block=, dispatch=1, self=) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3084 max_priority = 2147483647 timeout = -1 some_ready = nfds = 3 allocated_nfds = fds = 0x1f85c40 #3 0x00007f1f47301792 in g_main_loop_run (loop=0x1f77f90) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3297 __PRETTY_FUNCTION__ = "g_main_loop_run" #4 0x00007f1f4490b516 in gdbus_shared_thread_func (user_data=0x1f77fb0) at /build/buildd/glib2.0-2.30.0/./gio/gdbusprivate.c:276 data = 0x1f77fb0 #5 0x00007f1f473262b6 in g_thread_create_proxy (data=0x1f85930) at /build/buildd/glib2.0-2.30.0/./glib/gthread.c:1962 thread = 0x1f85930 __PRETTY_FUNCTION__ = "g_thread_create_proxy" #6 0x00007f1f46e9defc in start_thread (arg=0x7f1f32e9a700) at pthread_create.c:304 __res = pd = 0x7f1f32e9a700 now = unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 2628430482591192204, 139771983276064, 139771974887872, 0, 3, -2718931408028953460, -2718905017696512884}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}} not_first_call = 0 robust = pagesize_m1 = sp = freesize = __PRETTY_FUNCTION__ = "start_thread" #7 0x00007f1f4623389d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112 No locals. #8 0x0000000000000000 in ?? () No symbol table info available. . Thread 2 (Thread 0x7f1f3369b700 (LWP 1632)): #0 0x00007f1f46227773 in __GI___poll (fds=, nfds=, timeout=) at ../sysdeps/unix/sysv/linux/poll.c:87 resultvar = oldtype = 0 result = #1 0x00007f1f47300f68 in g_main_context_poll (n_fds=1, fds=0x1f78790, timeout=-1, context=0x1f785a0, priority=) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3402 poll_func = 0x7f1f4730f4c0 #2 g_main_context_iterate (context=0x1f785a0, block=, dispatch=1, self=) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3084 max_priority = 2147483647 timeout = -1 some_ready = nfds = 1 allocated_nfds = fds = 0x1f78790 #3 0x00007f1f47301792 in g_main_loop_run (loop=0x1f76460) at /build/buildd/glib2.0-2.30.0/./glib/gmain.c:3297 __PRETTY_FUNCTION__ = "g_main_loop_run" #4 0x00007f1f3e3a19cb in dconf_context_thread (data=) at dconfcontext.c:11 context = 0x1f785a0 loop = __PRETTY_FUNCTION__ = "dconf_context_thread" #5 0x00007f1f473262b6 in g_thread_create_proxy (data=0x1f78550) at /build/buildd/glib2.0-2.30.0/./glib/gthread.c:1962 thread = 0x1f78550 __PRETTY_FUNCTION__ = "g_thread_create_proxy" #6 0x00007f1f46e9defc in start_thread (arg=0x7f1f3369b700) at pthread_create.c:304 __res = pd = 0x7f1f3369b700 now = unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 2628430482591192204, 140735656667392, 139771983280576, 0, 3, -2718932507003710324, -2718905017696512884}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}} not_first_call = 0 robust = pagesize_m1 = sp = freesize = __PRETTY_FUNCTION__ = "start_thread" #7 0x00007f1f4623389d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112 No locals. #8 0x0000000000000000 in ?? () No symbol table info available. . Thread 1 (Thread 0x7f1f48fcd9c0 (LWP 1537)): #0 0x00007f1f35f6d565 in unity::switcher::SwitcherController::CompareSwitcherItemsPriority (first=0x2a515b0, second=0x404b663e4a683d4a) at /build/buildd/unity-4.28.0/plugins/unityshell/src/SwitcherController.cpp:354 No locals. #1 0x00007f1f35f6f122 in std::__insertion_sort<__gnu_cxx::__normal_iterator > >, bool (*)(AbstractLauncherIcon*, AbstractLauncherIcon*)> (__first=..., __last=..., __comp=0x7f1f35f6d540 ) at /usr/include/c++/4.6/bits/stl_algo.h:2129 __i = #2 0x00007f1f35f6ebdb in __final_insertion_sort<__gnu_cxx::__normal_iterator >, bool (*)(AbstractLauncherIcon*, AbstractLauncherIcon*)> (__last=, __first=, __comp=0x7f1f35f6d540 ) at /usr/include/c++/4.6/bits/stl_algo.h:2201 No locals. #3 sort<__gnu_cxx::__normal_iterator >, bool (*)(AbstractLauncherIcon*, AbstractLauncherIcon*)> (__comp=0x7f1f35f6d540 , __last=, __first=) at /usr/include/c++/4.6/bits/stl_algo.h:5370 No locals. #4 unity::switcher::SwitcherController::Show (this=0x25f6e50, show=, sort=, reverse=, results=...) at /build/buildd/unity-4.28.0/plugins/unityshell/src/SwitcherController.cpp:74 No locals. #5 0x00007f1f35fe75ed in UnityScreen::altTabInitiateCommon (this=0x1f2e680, action=, state=, options=) at /build/buildd/unity-4.28.0/plugins/unityshell/src/unityshell.cpp:1420 results = { >> = {_M_impl = {> = {<__gnu_cxx::new_allocator> = {}, }, _M_start = 0x7f1f2ca99150, _M_finish = 0x7f1f2ca99168, _M_end_of_storage = 0x7f1f2ca99170}}, } it = device = #6 0x00007f1f35fe79c5 in UnityScreen::altTabForwardInitiate (this=0x1f2e680, action=0x1f308e8, state=1, options=...) at /build/buildd/unity-4.28.0/plugins/unityshell/src/unityshell.cpp:1455 No locals. #7 0x0000000000455249 in operator() (a2=..., a1=1, a0=0x1f308e8, this=0x7fff92d28f50) at /usr/include/boost/function/function_template.hpp:1013 No locals. #8 PrivateScreen::triggerKeyPressBindings (this=0x1af0e60, options=..., event=0x7f1f2caac5c0, arguments=...) at /build/buildd/compiz-0.9.6+bzr20110929/src/event.cpp:284 _foreach_continue273 = false state = 1 action = 0x1f308e8 modMask = 33554669 bindMods = #9 0x0000000000456351 in PrivateScreen::handleActionEvent (this=0x1af0e60, event=0x7f1f2caac5c0) at /build/buildd/compiz-0.9.6+bzr20110929/src/event.cpp:702 options = @0x4 p = _foreach_continue699 = false o = { >> = {_M_impl = {> = {<__gnu_cxx::new_allocator> = {}, }, _M_start = 0x0, _M_finish = 0x0, _M_end_of_storage = 0x1afde40}}, } xid = #10 0x0000000000457b01 in CompScreen::handleEvent (this=0x1aec5d0, event=0x7f1f2caac5c0) at /build/buildd/compiz-0.9.6+bzr20110929/src/event.cpp:993 w = 0x0 wa = {x = 0, y = 0, width = 1920, height = 1056, border_width = 0, depth = 24, visual = 0x1b10650, root = 350, c_class = 1, bit_gravity = 1, win_gravity = 1, backing_store = 0, backing_planes = 4294967295, backing_pixel = 0, save_under = 0, colormap = 32, map_installed = 1, map_state = 2, all_event_masks = 6520959, your_event_mask = 6291472, do_not_propagate_mask = 0, override_redirect = 0, screen = 0x1af98d0} actionEventHandled = false #11 0x00007f1f3cc6eb04 in PrivateCompositeScreen::handleEvent (this=0x1b55370, event=0x7f1f2caac5c0) at /build/buildd/compiz-0.9.6+bzr20110929/plugins/composite/src/screen.cpp:102 w = #12 0x0000000000457be8 in CompScreen::handleEvent (this=0x1aec5d0, event=0x7f1f2caac5c0) at /build/buildd/compiz-0.9.6+bzr20110929/src/event.cpp:987 curr = 22 w = wa = {x = 0, y = 0, width = 0, height = 2, border_width = -8388608, depth = -8388608, visual = 0xffffff00ffffff, root = 12884901894, c_class = 160, bit_gravity = 19, win_gravity = 6, backing_store = 3, backing_planes = 81604378784, backing_pixel = 0, save_under = 172, colormap = 140733193388038, map_installed = 0, map_state = -1, all_event_masks = 39141216, your_event_mask = 140735656664880, do_not_propagate_mask = 140733193388050, override_redirect = 232, screen = 0x1bca060} actionEventHandled = #13 0x00007f1f3ca4d01f in PrivateGLScreen::handleEvent (this=0x1b59f90, event=0x7f1f2caac5c0) at /build/buildd/compiz-0.9.6+bzr20110929/plugins/opengl/src/screen.cpp:607 w = #14 0x0000000000457be8 in CompScreen::handleEvent (this=0x1aec5d0, event=0x7f1f2caac5c0) at /build/buildd/compiz-0.9.6+bzr20110929/src/event.cpp:987 curr = 20 w = wa = {x = 27335712, y = 0, width = 28923104, height = 0, border_width = 28923904, depth = 0, visual = 0x1e237d8, root = 28923904, c_class = 1005589249, bit_gravity = 32543, win_gravity = 5, backing_store = 0, backing_planes = 139772126228637, backing_pixel = 270, save_under = 28923104, colormap = 28923904, map_installed = 31602648, map_state = 0, all_event_masks = 28923904, your_event_mask = 1, do_not_propagate_mask = 5, override_redirect = 1005514909, screen = 0x10e} actionEventHandled = #15 0x00007f1f397d4f43 in DecorWindow::windowNotify (this=0x1db5840, n=62914740) at /build/buildd/compiz-0.9.6+bzr20110929/plugins/decor/src/decor.cpp:1519 No locals. #16 0x0000000000000000 in ?? () No symbol table info available.