.
Thread 4 (Thread 0x7fe26567c700 (LWP 1685)):
#0  0x00007fe2795dbdc3 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
        resultvar = <optimized out>
        oldtype = 0
        result = <optimized out>
#1  0x00007fe27a733e86 in g_main_context_iterate (dispatch=1, block=-1, context=0x7fe26000c5e0, self=<optimized out>) at /build/buildd/glib2.0-2.31.16/./glib/gmain.c:3100
        timeout = <optimized out>
        some_ready = <optimized out>
        fds = 0x7fe2580010c0
        max_priority = 2147483647
        nfds = <optimized out>
        allocated_nfds = 2054426080
#2  g_main_context_iterate (context=0x7fe26000c5e0, block=-1, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.31.16/./glib/gmain.c:3055
        some_ready = 1476399296
#3  0x00007fe27a7342ea in g_main_loop_unref (loop=0x7fe26000c500) at /build/buildd/glib2.0-2.31.16/./glib/gmain.c:3251
No locals.
#4  0x00007fe27c477a00 in ?? ()
No symbol table info available.
#5  0x00007fe26000c5b0 in ?? ()
No symbol table info available.
#6  0x00007fe277a8de26 in flush_data_list_complete (flushers=<optimized out>, error=0x7fe265e7c8b0) at /build/buildd/glib2.0-2.31.16/./gio/gdbusprivate.c:1158
        l = 0x0
#7  0x00007fe27a2cde9a in start_thread (arg=0x7fe26567c700) at pthread_create.c:308
        __res = <optimized out>
        pd = 0x7fe26567c700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 5170193793758948609, 140610349025456, 140610340637120, 0, 3, -5186742609949856511, -5186805893010920191}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 1610653696
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#8  0x00007fe2795e777d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#9  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 3 (Thread 0x7fe249ba3700 (LWP 1998)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:215
No locals.
#1  0x00007fe27a76f435 in g_cond_impl_free (cond=0xe7000001cd) at /build/buildd/glib2.0-2.31.16/./glib/gthread-posix.c:658
No locals.
#2  g_cond_clear (cond=0x2c63024) at /build/buildd/glib2.0-2.31.16/./glib/gthread-posix.c:719
No locals.
#3  0x000000000d3a71b0 in ?? ()
No symbol table info available.
#4  0x0000000002c62fa0 in ?? ()
No symbol table info available.
#5  0x0000000002c62fb8 in ?? ()
No symbol table info available.
#6  0x0000000002c62fa0 in ?? ()
No symbol table info available.
#7  0x00007fe27a70a13e in g_async_queue_pop_intern_unlocked (queue=0x2c63024, wait=137, end_time=0x1cd) at /build/buildd/glib2.0-2.31.16/./glib/gasyncqueue.c:410
        retval = <optimized out>
        __PRETTY_FUNCTION__ = "g_async_queue_pop_intern_unlocked"
#8  0x0000000002baec20 in ?? ()
No symbol table info available.
#9  0x0000000003d83ff0 in ?? ()
No symbol table info available.
#10 0x0000000000003a98 in ?? ()
No symbol table info available.
#11 0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 2 (Thread 0x7fe265e7d700 (LWP 1684)):
#0  0x00007fe2795dbdc3 in __GI___poll (fds=<optimized out>, nfds=<optimized out>, timeout=<optimized out>) at ../sysdeps/unix/sysv/linux/poll.c:87
        resultvar = <optimized out>
        oldtype = 0
        result = <optimized out>
#1  0x00007fe27a733e86 in g_main_context_iterate (dispatch=1, block=-1, context=0x1d254f0, self=<optimized out>) at /build/buildd/glib2.0-2.31.16/./glib/gmain.c:3100
        timeout = <optimized out>
        some_ready = <optimized out>
        fds = 0x7fe2600010e0
        max_priority = 2147483647
        nfds = <optimized out>
        allocated_nfds = 2054426080
#2  g_main_context_iterate (context=0x1d254f0, block=-1, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.31.16/./glib/gmain.c:3055
        some_ready = 1610617056
#3  0x00007fe27a7342ea in g_main_loop_unref (loop=0x7fe2600010c0) at /build/buildd/glib2.0-2.31.16/./glib/gmain.c:3251
No locals.
#4  0x0000000001d24810 in ?? ()
No symbol table info available.
#5  0x0000000001d254f0 in ?? ()
No symbol table info available.
#6  0x00007fe265e8275b in dconf_context_thread (data=0x8) at dconfcontext.c:11
        context = 0x8
        loop = <optimized out>
        __PRETTY_FUNCTION__ = "dconf_context_thread"
#7  0x00007fe27a755485 in gtest_default_log_handler (log_domain=0x7fe2600010e0 "\016", log_level=26839120, message=0x7fff5ff30e80 "", unused_data=0x7fe265e7d9c0) at /build/buildd/glib2.0-2.31.16/./glib/gtestutils.c:1813
        strv = {0x0, 0x7fe27a2cde9a "dH\211\004%0\006", 0x0, 0x7fe265e7d700 "", 0x0 <repeats 12 times>}
        fatal = 3
        msg = <optimized out>
        i = 4294967295
#8  0x00007fe265e7d9c0 in ?? ()
No symbol table info available.
#9  0x0000000000000000 in ?? ()
No symbol table info available.
.
Thread 1 (Thread 0x7fe27c4689c0 (LWP 1592)):
#0  0x00000000034c1e90 in ?? ()
No symbol table info available.
#1  0x00007fe26ac0f28c in unity::launcher::Launcher::DndReset (this=0x3f52e10) at /build/buildd/unity-5.2.0/plugins/unityshell/src/Launcher.cpp:2593
        it = 0x2267b60
        __for_range = <optimized out>
#2  0x00007fe26ac0f7c6 in unity::launcher::Launcher::OnUpdateDragManagerTimeout (data=0x3f52e10) at /build/buildd/unity-5.2.0/plugins/unityshell/src/Launcher.cpp:1425
        self = 0x3f52e10
        drag_owner = 0
        child_r = 14681042
        root_x_r = 639
        win_y_r = 417
        mask = 0
        root_r = 175
        root_y_r = 417
        win_x_r = 639
#3  0x00007fe27a73476b in g_source_get_time (source=0x2267b60) at /build/buildd/glib2.0-2.31.16/./glib/gmain.c:3639
        context = <optimized out>
        result = <optimized out>
#4  0x0000000000000001 in ?? ()
No symbol table info available.
#5  0x0000000003567b50 in ?? ()
No symbol table info available.
#6  0x0000000000000005 in ?? ()
No symbol table info available.
#7  0x00007fe27a733b2a in g_main_dispatch (context=0x187d690) at /build/buildd/glib2.0-2.31.16/./glib/gmain.c:2486
        dispatch = 0x7fe27a734750 <g_source_get_current_time>
        was_in_call = <optimized out>
        user_data = 0x3f52e10
        callback = 0x7fe26ac0f6c0 <unity::launcher::Launcher::OnUpdateDragManagerTimeout(void*)>
        cb_funcs = 0x7fe27a9dd9a0
        cb_data = 0x2680ca0
        current_source_link = {data = 0x3567b50, next = 0x0}
        need_destroy = <optimized out>
        source = 0x3567b50
        current = 0x19ca890
        i = <optimized out>
#8  g_main_context_dispatch (context=0x187d690) at /build/buildd/glib2.0-2.31.16/./glib/gmain.c:3047
No locals.
#9  0x00007fe27a733ef0 in g_main_context_iterate (dispatch=1, block=0, context=0x187d690, self=<optimized out>) at /build/buildd/glib2.0-2.31.16/./glib/gmain.c:3122
        timeout = <optimized out>
        some_ready = <optimized out>
        fds = 0x1
        max_priority = 0
        nfds = 13
        allocated_nfds = 2054426080
#10 g_main_context_iterate (context=0x187d690, block=0, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.31.16/./glib/gmain.c:3055
        some_ready = 1
#11 0x00007fe27a7342ea in g_main_loop_unref (loop=0x19cac00) at /build/buildd/glib2.0-2.31.16/./glib/gmain.c:3251
No locals.
#12 0x00007fe27c47e9d8 in ?? ()
No symbol table info available.
#13 0x0000000001999190 in ?? ()
No symbol table info available.
#14 0x000000000042e856 in CompScreen::eventLoop() ()
No symbol table info available.
#15 0x000000000042221a in main ()
No symbol table info available.