.
Thread 4 (LWP 3512):
#0  0x00007fc0eb78c3cd in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007fc0ec00715c in g_main_context_poll (n_fds=5, fds=0x7fc0d4005600, timeout=-1, context=0x7fc0ee4d4b00, priority=<optimized out>) at /build/buildd/glib2.0-2.35.8/./glib/gmain.c:3995
        poll_func = 0x7fc0ec015550 <g_poll>
#2  g_main_context_iterate (context=0x7fc0ee4d4b00, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.35.8/./glib/gmain.c:3696
        max_priority = 2147483647
        timeout = -1
        some_ready = <optimized out>
        allocated_nfds = <optimized out>
        fds = 0x7fc0d4005600
        nfds = 5
#3  0x00007fc0ec00763a in g_main_loop_run (loop=0x7fc0ee4d4a90) at /build/buildd/glib2.0-2.35.8/./glib/gmain.c:3895
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#4  0x00007fc0ec5e3726 in gdbus_shared_thread_func (user_data=0x7fc0ee4d4ad0) at /build/buildd/glib2.0-2.35.8/./gio/gdbusprivate.c:278
        data = 0x7fc0ee4d4ad0
#5  0x00007fc0ec02b075 in g_thread_proxy (data=0x7fc0ee4cf370) at /build/buildd/glib2.0-2.35.8/./glib/gthread.c:798
        thread = 0x7fc0ee4cf370
#6  0x00007fc0eba6ef8e in start_thread (arg=0x7fc0e267d700) at pthread_create.c:311
        __res = <optimized out>
        pd = 0x7fc0e267d700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140466408904448, 658266368970499538, 0, 140466601775200, 140736070736688, 4096, -674584425636125230, -674565176636430894}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#7  0x00007fc0eb798e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
No locals.
.
Thread 3 (LWP 3531):
#0  0x00007fc0eb78c3cd in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007fc0ec00715c in g_main_context_poll (n_fds=1, fds=0x7fc0a00008c0, timeout=-1, context=0x7fc0ee95b5d0, priority=<optimized out>) at /build/buildd/glib2.0-2.35.8/./glib/gmain.c:3995
        poll_func = 0x7fc0ec015550 <g_poll>
#2  g_main_context_iterate (context=context@entry=0x7fc0ee95b5d0, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.35.8/./glib/gmain.c:3696
        max_priority = 2147483647
        timeout = -1
        some_ready = <optimized out>
        allocated_nfds = <optimized out>
        fds = 0x7fc0a00008c0
        nfds = 1
#3  0x00007fc0ec007284 in g_main_context_iteration (context=0x7fc0ee95b5d0, may_block=may_block@entry=1) at /build/buildd/glib2.0-2.35.8/./glib/gmain.c:3762
        retval = <optimized out>
#4  0x00007fc0ec0072e1 in glib_worker_main (data=<optimized out>) at /build/buildd/glib2.0-2.35.8/./glib/gmain.c:5427
No locals.
#5  0x00007fc0ec02b075 in g_thread_proxy (data=0x7fc0ee95b2d0) at /build/buildd/glib2.0-2.35.8/./glib/gthread.c:798
        thread = 0x7fc0ee95b2d0
#6  0x00007fc0eba6ef8e in start_thread (arg=0x7fc0a541c700) at pthread_create.c:311
        __res = <optimized out>
        pd = 0x7fc0a541c700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140465382999808, 658266368970499538, 0, 140466601775200, 140736070736656, 4096, -674436837138061870, -674565176636430894}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#7  0x00007fc0eb798e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
No locals.
.
Thread 2 (LWP 3511):
#0  0x00007fc0eb78c3cd in poll () at ../sysdeps/unix/syscall-template.S:81
No locals.
#1  0x00007fc0ec00715c in g_main_context_poll (n_fds=1, fds=0x7fc0dc0010e0, timeout=-1, context=0x7fc0ee4b3230, priority=<optimized out>) at /build/buildd/glib2.0-2.35.8/./glib/gmain.c:3995
        poll_func = 0x7fc0ec015550 <g_poll>
#2  g_main_context_iterate (context=context@entry=0x7fc0ee4b3230, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.35.8/./glib/gmain.c:3696
        max_priority = 2147483647
        timeout = -1
        some_ready = <optimized out>
        allocated_nfds = <optimized out>
        fds = 0x7fc0dc0010e0
        nfds = 1
#3  0x00007fc0ec007284 in g_main_context_iteration (context=context@entry=0x7fc0ee4b3230, may_block=may_block@entry=1) at /build/buildd/glib2.0-2.35.8/./glib/gmain.c:3762
        retval = <optimized out>
#4  0x00007fc0e3d3e9cd in dconf_gdbus_worker_thread (user_data=0x7fc0ee4b3230) at dconf-gdbus-thread.c:81
        context = 0x7fc0ee4b3230
#5  0x00007fc0ec02b075 in g_thread_proxy (data=0x7fc0ee4abe30) at /build/buildd/glib2.0-2.35.8/./glib/gthread.c:798
        thread = 0x7fc0ee4abe30
#6  0x00007fc0eba6ef8e in start_thread (arg=0x7fc0e34fb700) at pthread_create.c:311
        __res = <optimized out>
        pd = 0x7fc0e34fb700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140466424100608, 658266368970499538, 0, 140466601775200, 140736070737200, 4096, -674581886236711470, -674565176636430894}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#7  0x00007fc0eb798e1d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:113
No locals.
.
Thread 1 (LWP 3509):
#0  on_screenshot_finished (source=0x7fc0ee4ca050, res=0x7fc0ef28fab0, user_data=user_data@entry=0x7fc0ee7878a0) at cc-background-panel.c:250
        panel = 0x7fc0ee7878a0
        priv = 0xaaaaaaaaaaaaaaaa
        error = 0x0
        rect = {x = 0, y = 0, width = -296968112, height = 32704}
        workarea_rect = {x = -297257104, y = 32704, width = -738176256, height = 32704}
        widget = <optimized out>
        pixbuf = <optimized out>
        surface = <optimized out>
        cr = <optimized out>
        width = <optimized out>
        height = <optimized out>
        primary = <optimized out>
#1  0x00007fc0ec57f27e in g_simple_async_result_complete (simple=0x7fc0ef28fab0) at /build/buildd/glib2.0-2.35.8/./gio/gsimpleasyncresult.c:777
        current_source = <optimized out>
        current_context = <optimized out>
        __PRETTY_FUNCTION__ = "g_simple_async_result_complete"
#2  0x00007fc0ec5d543e in g_dbus_connection_call_done (source=0x7fc0ee4ca050, result=<optimized out>, user_data=user_data@entry=0x7fc0f087b010) at /build/buildd/glib2.0-2.35.8/./gio/gdbusconnection.c:5333
        simple = 0x7fc0ef28fab0
        connection = <optimized out>
        state = 0x7fc0f087b010
        error = 0x7fc0ef8c9920
        reply = 0x0
#3  0x00007fc0ec57f27e in g_simple_async_result_complete (simple=0x7fc0eec38420) at /build/buildd/glib2.0-2.35.8/./gio/gsimpleasyncresult.c:777
        current_source = <optimized out>
        current_context = <optimized out>
        __PRETTY_FUNCTION__ = "g_simple_async_result_complete"
#4  0x00007fc0ec57f3ac in complete_in_idle_cb (data=0x7fc0eec38420) at /build/buildd/glib2.0-2.35.8/./gio/gsimpleasyncresult.c:789
        simple = <optimized out>
#5  0x00007fc0ec006e85 in g_main_dispatch (context=0x7fc0ee483770) at /build/buildd/glib2.0-2.35.8/./glib/gmain.c:3054
        dispatch = 0x7fc0ec003c20 <g_idle_dispatch>
        was_in_call = 0
        user_data = 0x7fc0eec38420
        callback = 0x7fc0ec57f390 <complete_in_idle_cb>
        cb_funcs = 0x7fc0ec2b8a00 <g_source_callback_funcs>
        cb_data = 0x7fc0d4005300
        current_source_link = {data = 0x7fc0d400c9b0, next = 0x0}
        need_destroy = <optimized out>
        source = 0x7fc0d400c9b0
        current = 0x7fc0ee4d4130
        i = <optimized out>
#6  g_main_context_dispatch (context=context@entry=0x7fc0ee483770) at /build/buildd/glib2.0-2.35.8/./glib/gmain.c:3630
No locals.
#7  0x00007fc0ec0071c8 in g_main_context_iterate (context=context@entry=0x7fc0ee483770, block=block@entry=1, dispatch=dispatch@entry=1, self=<optimized out>) at /build/buildd/glib2.0-2.35.8/./glib/gmain.c:3701
        max_priority = 0
        timeout = 0
        some_ready = 1
        allocated_nfds = <optimized out>
        fds = 0x7fc0ee833070
        nfds = <optimized out>
#8  0x00007fc0ec007284 in g_main_context_iteration (context=0x7fc0ee483770, context@entry=0x0, may_block=may_block@entry=1) at /build/buildd/glib2.0-2.35.8/./glib/gmain.c:3762
        retval = <optimized out>
#9  0x00007fc0ec5af51c in g_application_run (application=0x7fc0ee4ca350, argc=argc@entry=2, argv=argv@entry=0x7fffab80e7e8) at /build/buildd/glib2.0-2.35.8/./gio/gapplication.c:1620
        arguments = 0x7fc0ee5a6940
        status = -282527056
        i = <optimized out>
        __PRETTY_FUNCTION__ = "g_application_run"
#10 0x00007fc0ede762ba in main (argc=2, argv=0x7fffab80e7e8) at control-center.c:263
        shell = <optimized out>
        application = 0x7fc0ee4ca350
        status = <optimized out>