.
Thread 3 (Thread 1522):
#0  0x00007fe9e21fa283 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  0x00007fe9e13f8250 in g_main_context_poll (context=0xf10c20, block=<value optimized out>, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.27.93/glib/gmain.c:3404
        poll_func = 0x7fe9e14081f0 <g_poll>
#2  g_main_context_iterate (context=0xf10c20, block=<value optimized out>, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.27.93/glib/gmain.c:3086
        max_priority = 2147483647
        timeout = -1
        some_ready = <value optimized out>
        nfds = 3
        allocated_nfds = <value optimized out>
        fds = 0xf14900
#3  0x00007fe9e13f8b2a in g_main_loop_run (loop=0xf10c00) at /build/buildd/glib2.0-2.27.93/glib/gmain.c:3299
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#4  0x00007fe9deb60b44 in gdbus_shared_thread_func (data=<value optimized out>) at /build/buildd/glib2.0-2.27.93/gio/gdbusprivate.c:276
No locals.
#5  0x00007fe9e141f664 in g_thread_create_proxy (data=0xf10d00) at /build/buildd/glib2.0-2.27.93/glib/gthread.c:1897
        thread = 0xf10d00
        __PRETTY_FUNCTION__ = "g_thread_create_proxy"
#6  0x00007fe9e2bcfd8c in start_thread (arg=0x7fe9de3fc700) at pthread_create.c:304
        pd = 0x7fe9de3fc700
        now = <value optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140642432829184, 6288062059571834771, 140735976417696, 140642432829888, 0, 3, -6300514576349532269, -6300418946851410029}, 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  0x00007fe9e220739d 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 1611):
#0  0x00007fe9e21fa283 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  0x00007fe9e13f8250 in g_main_context_poll (context=0x1636de0, block=<value optimized out>, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.27.93/glib/gmain.c:3404
        poll_func = 0x7fe9e14081f0 <g_poll>
#2  g_main_context_iterate (context=0x1636de0, block=<value optimized out>, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.27.93/glib/gmain.c:3086
        max_priority = 2147483647
        timeout = -1
        some_ready = <value optimized out>
        nfds = 1
        allocated_nfds = <value optimized out>
        fds = 0x1633da0
#3  0x00007fe9e13f8b2a in g_main_loop_run (loop=0x16337b0) at /build/buildd/glib2.0-2.27.93/glib/gmain.c:3299
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#4  0x00007fe9cd95aa6b in dconf_context_thread (data=0x1636de0) at dconfcontext.c:11
        context = 0x1636de0
        loop = <value optimized out>
        __PRETTY_FUNCTION__ = "dconf_context_thread"
#5  0x00007fe9e141f664 in g_thread_create_proxy (data=0x165e260) at /build/buildd/glib2.0-2.27.93/glib/gthread.c:1897
        thread = 0x165e260
        __PRETTY_FUNCTION__ = "g_thread_create_proxy"
#6  0x00007fe9e2bcfd8c in start_thread (arg=0x7fe9ca3f5700) at pthread_create.c:304
        pd = 0x7fe9ca3f5700
        now = <value optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140642097256192, 6288062059571834771, 140735976416416, 140642097256896, 0, 3, -6300470602863743085, -6300418946851410029}, 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  0x00007fe9e220739d 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 1515):
#0  __pthread_mutex_lock (mutex=0x894c02fa8328ec8b) at pthread_mutex_lock.c:50
        __PRETTY_FUNCTION__ = "__pthread_mutex_lock"
        type = <value optimized out>
        id = <value optimized out>
#1  0x00007fe9e13f39b9 in g_source_unref_internal (source=0x7fe9e18d38e0, context=0x894c02fa8328ec83, have_lock=0) at /build/buildd/glib2.0-2.27.93/glib/gmain.c:1671
        old_cb_data = 0x0
        old_cb_funcs = 0x0
        __PRETTY_FUNCTION__ = "g_source_unref_internal"
#2  0x000000000042cada in PrivateScreen::~PrivateScreen() ()
No symbol table info available.
#3  0x000000000042cd69 in PrivateScreen::~PrivateScreen() ()
No symbol table info available.
#4  0x000000000042ae45 in CompScreen::~CompScreen() ()
No symbol table info available.
#5  0x000000000042af59 in CompScreen::~CompScreen() ()
No symbol table info available.
#6  0x0000000000422689 in CompManager::fini() ()
No symbol table info available.
#7  0x0000000000422f18 in main ()
No symbol table info available.