.
Thread 2 (Thread 1956):
#0  0x00007fbd21ae7e33 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  0x00007fbd22e34104 in g_main_context_poll (context=0xb8a420, block=<value optimized out>, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.28.4/./glib/gmain.c:3404
        poll_func = 0x7fbd22e44130 <g_poll>
#2  g_main_context_iterate (context=0xb8a420, block=<value optimized out>, dispatch=1, self=<value optimized out>) at /build/buildd/glib2.0-2.28.4/./glib/gmain.c:3086
        max_priority = 2147483647
        timeout = -1
        some_ready = <value optimized out>
        nfds = 1
        allocated_nfds = <value optimized out>
        fds = 0xb8a3e0
#3  0x00007fbd22e349f2 in g_main_loop_run (loop=0xb8a400) at /build/buildd/glib2.0-2.28.4/./glib/gmain.c:3299
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#4  0x00007fbd23e5dd44 in gdbus_shared_thread_func (data=<value optimized out>) at /build/buildd/glib2.0-2.28.4/./gio/gdbusprivate.c:276
No locals.
#5  0x00007fbd22e5b3e4 in g_thread_create_proxy (data=0xb8a500) at /build/buildd/glib2.0-2.28.4/./glib/gthread.c:1897
        thread = 0xb8a500
        __PRETTY_FUNCTION__ = "g_thread_create_proxy"
#6  0x00007fbd2275fd8c in start_thread (arg=0x7fbd1f360700) at pthread_create.c:304
        pd = 0x7fbd1f360700
        now = <value optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140450249180928, 6085447373583908879, 140735987526960, 140450249181632, 0, 3, -6122111190170763249, -6122187606212378609}, 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  0x00007fbd21af4f7d 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 1936):
#0  g_source_unref (source=0x200000003) at /build/buildd/glib2.0-2.28.4/./glib/gmain.c:1734
        __PRETTY_FUNCTION__ = "g_source_unref"
#1  0x000000000042cea8 in PrivateScreen::~PrivateScreen() ()
No symbol table info available.
#2  0x000000000042d129 in PrivateScreen::~PrivateScreen() ()
No symbol table info available.
#3  0x000000000042b1d5 in CompScreen::~CompScreen() ()
No symbol table info available.
#4  0x000000000042b309 in CompScreen::~CompScreen() ()
No symbol table info available.
#5  0x0000000000422949 in CompManager::fini() ()
No symbol table info available.
#6  0x0000000000423148 in main ()
No symbol table info available.