.
Thread 3 (Thread 2056):
#0  0x00007fce68e95f03 in __poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=<value optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
        resultvar = 18446744073709551100
        oldtype = 0
        result = <value optimized out>
#1  0x00007fce6a1d1104 in g_main_context_poll (context=0x7fce60001300, block=<value optimized out>, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.28.5/./glib/gmain.c:3404
        poll_func = 0x7fce6a1e1130 <g_poll>
#2  g_main_context_iterate (context=0x7fce60001300, block=<value optimized out>, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.28.5/./glib/gmain.c:3086
        max_priority = 2147483647
        timeout = -1
        some_ready = <value optimized out>
        nfds = 1
        allocated_nfds = <value optimized out>
        fds = 0xe2d0a0
#3  0x00007fce6a1d19f2 in g_main_loop_run (loop=0xe2d060) at /build/buildd/glib2.0-2.28.5/./glib/gmain.c:3299
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#4  0x00007fce502df69b in dconf_context_thread (data=0x7fce60001300) at dconfcontext.c:11
        context = 0x7fce60001300
        loop = <value optimized out>
        __PRETTY_FUNCTION__ = "dconf_context_thread"
#5  0x00007fce6a1f83e4 in g_thread_create_proxy (data=0x7fce600039c0) at /build/buildd/glib2.0-2.28.5/./glib/gthread.c:1897
        thread = 0x7fce600039c0
        __PRETTY_FUNCTION__ = "g_thread_create_proxy"
#6  0x00007fce69afcd8c in start_thread (arg=0x7fce502da700) at pthread_create.c:304
        pd = 0x7fce502da700
        now = <value optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140524085159680, -3182767988432179850, 140733907701584, 140524085160384, 0, 3, 3190845671999794550, 3190899563655851382}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        robust = <value optimized out>
        sp = <value optimized out>
        freesize = <value optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#7  0x00007fce68ea304d 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 1879):
#0  0x00007fce68e95f03 in __poll (fds=<value optimized out>, nfds=<value optimized out>, timeout=<value optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
        resultvar = 1
        oldtype = 0
        result = <value optimized out>
#1  0x00007fce6a1d1104 in g_main_context_poll (context=0x952390, block=<value optimized out>, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.28.5/./glib/gmain.c:3404
        poll_func = 0x7fce6a1e1130 <g_poll>
#2  g_main_context_iterate (context=0x952390, block=<value optimized out>, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.28.5/./glib/gmain.c:3086
        max_priority = 2147483647
        timeout = -1
        some_ready = <value optimized out>
        nfds = 3
        allocated_nfds = <value optimized out>
        fds = 0x9527d0
#3  0x00007fce6a1d19f2 in g_main_loop_run (loop=0x952370) at /build/buildd/glib2.0-2.28.5/./glib/gmain.c:3299
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#4  0x00007fce6b1fbd44 in gdbus_shared_thread_func (data=<value optimized out>) at /build/buildd/glib2.0-2.28.5/./gio/gdbusprivate.c:276
No locals.
#5  0x00007fce6a1f83e4 in g_thread_create_proxy (data=0x952470) at /build/buildd/glib2.0-2.28.5/./glib/gthread.c:1897
        thread = 0x952470
        __PRETTY_FUNCTION__ = "g_thread_create_proxy"
#6  0x00007fce69afcd8c in start_thread (arg=0x7fce6670d700) at pthread_create.c:304
        pd = 0x7fce6670d700
        now = <value optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140524458661632, -3182767988432179850, 140733907705504, 140524458662336, 0, 3, 3190876757362470262, 3190899563655851382}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        robust = <value optimized out>
        sp = <value optimized out>
        freesize = <value optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#7  0x00007fce68ea304d 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 1875):
#0  0x00000000021c12e0 in ?? ()
No symbol table info available.
#1  0x00007fce59a2d321 in PanelView::~PanelView (this=0x1bee8a0, __in_chrg=<value optimized out>) at /build/buildd/unity-3.8.8/src/PanelView.cpp:90
No locals.
#2  0x00007fce59a2d499 in PanelView::~PanelView (this=0x1bee8a0, __in_chrg=<value optimized out>) at /build/buildd/unity-3.8.8/src/PanelView.cpp:97
No locals.
#3  0x00007fce58a10a7b in nux::Object::Destroy (this=0x1bee8b8) at ./Object.cpp:430
No locals.
#4  0x00007fce58a10c6e in nux::Object::UnReference (this=0x1bee8b8) at ./Object.cpp:333
No locals.
#5  0x00007fce596bfc95 in nux::Layout::~Layout (this=0x21b11a0, __in_chrg=<value optimized out>) at ./Layout.cpp:57
No locals.
#6  0x00007fce596af3c9 in nux::HLayout::~HLayout (this=0x21b11a0, __in_chrg=<value optimized out>) at ./HLayout.cpp:65
No locals.
#7  0x00007fce58a10a7b in nux::Object::Destroy (this=0x21b11a0) at ./Object.cpp:430
No locals.
#8  0x00007fce58a10c6e in nux::Object::UnReference (this=0x21b11a0) at ./Object.cpp:333
No locals.
#9  0x00007fce596b89e9 in nux::View::RemoveLayout (this=0x2226a10) at ./View.cpp:426
No locals.
#10 0x00007fce596b8f5a in nux::View::~View (this=0x2226a10, __in_chrg=<value optimized out>) at ./View.cpp:60
No locals.
#11 0x00007fce596836f9 in nux::BaseWindow::~BaseWindow (this=0x2226a10, __in_chrg=<value optimized out>) at ./BaseWindow.cpp:97
No locals.
#12 0x00007fce58a10a7b in nux::Object::Destroy (this=0x2226a10) at ./Object.cpp:430
No locals.
#13 0x00007fce58a10c6e in nux::Object::UnReference (this=0x2226a10) at ./Object.cpp:333
No locals.
#14 0x00007fce59a2124d in PanelController::OnScreenChanged (this=0x170ac50, primary_monitor=0, monitors=...) at /build/buildd/unity-3.8.8/src/PanelController.cpp:200
        n_monitors = 1
        i = <value optimized out>
#15 0x00007fce59a929f2 in emit (this=0x1772150) at /usr/include/sigc++-2.0/sigc++/signal.h:1252
No locals.
#16 emit (this=0x1772150) at /usr/include/sigc++-2.0/sigc++/signal.h:2885
No locals.
#17 UScreen::Refresh (this=0x1772150) at /build/buildd/unity-3.8.8/src/UScreen.cpp:127
        screen = <value optimized out>
        primary = 0
        last_geo = {x = 0, y = 0, width = 1366, height = 768}
#18 0x00007fce59a92b00 in UScreen::OnIdleChanged (self=<value optimized out>) at /build/buildd/unity-3.8.8/src/UScreen.cpp:87
No locals.
#19 0x00007fce6a1d0bcd in g_main_dispatch (context=0x9526a0) at /build/buildd/glib2.0-2.28.5/./glib/gmain.c:2440
        dispatch = 0x7fce6a1cc4e0 <g_idle_dispatch>
        was_in_call = 0
        user_data = 0x1772150
        callback = 0x7fce59a92af0 <UScreen::OnIdleChanged(UScreen*)>
        cb_funcs = 0x7fce6a47b630
        cb_data = 0x7fce600143c0
        current_source_link = {data = 0x7fce60bf8da0, next = 0x0}
        need_destroy = <value optimized out>
        source = 0x7fce60bf8da0
        current = 0x953090
        i = <value optimized out>
#20 g_main_context_dispatch (context=0x9526a0) at /build/buildd/glib2.0-2.28.5/./glib/gmain.c:3013
No locals.
#21 0x00007fce6a1d13a8 in g_main_context_iterate (context=0x9526a0, block=<value optimized out>, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.28.5/./glib/gmain.c:3091
        max_priority = 200
        timeout = 0
        some_ready = 1
        nfds = 16
        allocated_nfds = <value optimized out>
        fds = <value optimized out>
#22 0x00007fce6a1d19f2 in g_main_loop_run (loop=0x982c90) at /build/buildd/glib2.0-2.28.5/./glib/gmain.c:3299
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#23 0x000000000042a2ea in CompScreen::eventLoop() ()
No symbol table info available.
#24 0x0000000000423160 in main ()
No symbol table info available.