.
Thread 4 (Thread 0x7f9953900700 (LWP 836)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 () at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:215
No locals.
#1  0x00007f995575c9d5 in g_cond_wait_until (cond=cond@entry=0x6dd0c8, mutex=mutex@entry=0x6dd0c0, end_time=end_time@entry=20709514) at /build/buildd/glib2.0-2.33.10/./glib/gthread-posix.c:855
        ts = {tv_sec = 20, tv_nsec = 709514000}
        status = <optimized out>
#2  0x00007f99556f6581 in g_async_queue_pop_intern_unlocked (queue=queue@entry=0x6dd0c0, wait=wait@entry=1, end_time=end_time@entry=20709514) at /build/buildd/glib2.0-2.33.10/./glib/gasyncqueue.c:424
        retval = <optimized out>
        __PRETTY_FUNCTION__ = "g_async_queue_pop_intern_unlocked"
#3  0x00007f99556f6bca in g_async_queue_timeout_pop (queue=0x6dd0c0, timeout=timeout@entry=15000000) at /build/buildd/glib2.0-2.33.10/./glib/gasyncqueue.c:545
        end_time = 20709514
        retval = <optimized out>
#4  0x00007f99557438d2 in g_thread_pool_wait_for_new_pool () at /build/buildd/glib2.0-2.33.10/./glib/gthreadpool.c:169
        pool = <optimized out>
        local_max_idle_time = 15000
        local_wakeup_thread_serial = <optimized out>
        local_max_unused_threads = 2
        last_wakeup_thread_serial = 0
        have_relayed_thread_marker = 0
#5  g_thread_pool_thread_proxy (data=<optimized out>) at /build/buildd/glib2.0-2.33.10/./glib/gthreadpool.c:366
        free_pool = <optimized out>
        task = 0x2
        pool = <optimized out>
#6  0x00007f9955743115 in g_thread_proxy (data=0x6dc540) at /build/buildd/glib2.0-2.33.10/./glib/gthread.c:801
        thread = 0x6dc540
#7  0x00007f99554c2e9a in start_thread (arg=0x7f9953900700) at pthread_create.c:308
        __res = <optimized out>
        pd = 0x7f9953900700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -2525785296927486462, 140737020017744, 140296508672448, 0, 3, 2576125749603569154, 2576113136888942082}, 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"
#8  0x00007f99551f039d 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 0x7f993f981700 (LWP 1821)):
#0  0x00007f99551e49e3 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  0x00007f993fddea9a in ?? () from /tmp/tmpbinQiQ/usr/lib/x86_64-linux-gnu/libavahi-common.so.3
No symbol table info available.
#2  0x00007f993fdde59b in avahi_simple_poll_run () from /tmp/tmpbinQiQ/usr/lib/x86_64-linux-gnu/libavahi-common.so.3
No symbol table info available.
#3  0x00007f993fdde778 in avahi_simple_poll_iterate () from /tmp/tmpbinQiQ/usr/lib/x86_64-linux-gnu/libavahi-common.so.3
No symbol table info available.
#4  0x00007f993fdde9ad in avahi_simple_poll_loop () from /tmp/tmpbinQiQ/usr/lib/x86_64-linux-gnu/libavahi-common.so.3
No symbol table info available.
#5  0x00007f993fddea2c in ?? () from /tmp/tmpbinQiQ/usr/lib/x86_64-linux-gnu/libavahi-common.so.3
No symbol table info available.
#6  0x00007f99554c2e9a in start_thread (arg=0x7f993f981700) at pthread_create.c:308
        __res = <optimized out>
        pd = 0x7f993f981700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -2525785296927486462, 140296537819264, 140296173656512, 0, 3, 2576310326359985666, 2576113136888942082}, 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  0x00007f99551f039d 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 0x7f99530ff700 (LWP 838)):
#0  0x00007f99551e49e3 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  0x00007f9955720084 in g_main_context_poll (n_fds=3, fds=0x7f99440010c0, timeout=-1, context=0x7f994c00c7f0, priority=<optimized out>) at /build/buildd/glib2.0-2.33.10/./glib/gmain.c:3576
        poll_func = 0x7f995572e130 <g_poll>
#2  g_main_context_iterate (context=0x7f994c00c7f0, block=block@entry=1, dispatch=dispatch@entry=1, self=<error reading variable: Unhandled dwarf expression opcode 0xfa>) at /build/buildd/glib2.0-2.33.10/./glib/gmain.c:3277
        max_priority = 2147483647
        timeout = -1
        some_ready = <optimized out>
        nfds = 3
        allocated_nfds = <optimized out>
        fds = 0x7f99440010c0
#3  0x00007f99557204e2 in g_main_loop_run (loop=0x7f994c00c780) at /build/buildd/glib2.0-2.33.10/./glib/gmain.c:3476
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#4  0x00007f9955cf4f56 in gdbus_shared_thread_func (user_data=0x7f994c00c7c0) at /build/buildd/glib2.0-2.33.10/./gio/gdbusprivate.c:277
        data = 0x7f994c00c7c0
#5  0x00007f9955743115 in g_thread_proxy (data=0x7f994c003f70) at /build/buildd/glib2.0-2.33.10/./glib/gthread.c:801
        thread = 0x7f994c003f70
#6  0x00007f99554c2e9a in start_thread (arg=0x7f99530ff700) at pthread_create.c:308
        __res = <optimized out>
        pd = 0x7f99530ff700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -2525785296927486462, 140296508668928, 140296500279744, 0, 3, 2576126848578326018, 2576113136888942082}, 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  0x00007f99551f039d 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 0x7f99567ba7c0 (LWP 819)):
#0  __opendirat (dfd=-100, name=0x0) at ../sysdeps/unix/opendir.c:87
        fd = 0
#1  0x00007f993e24a7de in usbfs_get_device_list (_discdevs=0x7fffe41573d8, ctx=0x733040) at ../../libusb/os/linux_usbfs.c:1088
        entry = <optimized out>
        buses = <optimized out>
        discdevs = <optimized out>
        r = <optimized out>
#2  op_get_device_list (ctx=0x733040, _discdevs=0x7fffe41573d8) at ../../libusb/os/linux_usbfs.c:1280
No locals.
#3  0x00007f993e2431dc in libusb_get_device_list (ctx=0x733040, list=0x7fffe41574a8) at ../../libusb/core.c:604
        discdevs = 0x728090
        ret = <optimized out>
        r = 0
        i = <optimized out>
        len = <optimized out>
        __FUNCTION__ = "libusb_get_device_list"
#4  0x00007f993e98a9f8 in ?? () from /tmp/tmpbinQiQ/usr/lib/libhpmud.so.0
No symbol table info available.
#5  0x00007f993e97f196 in hpmud_probe_devices () from /tmp/tmpbinQiQ/usr/lib/libhpmud.so.0
No symbol table info available.
#6  0x00007f993ef5f05d in ?? () from /tmp/tmpbinQiQ/usr/lib/sane/libsane-hpaio.so.1
No symbol table info available.
#7  0x00007f993ef5f610 in sane_hpaio_get_devices () from /tmp/tmpbinQiQ/usr/lib/sane/libsane-hpaio.so.1
No symbol table info available.
#8  0x00007f9955f843d6 in sane_dll_get_devices (device_list=device_list@entry=0x7fffe415bc88, local_only=local_only@entry=1) at dll.c:1056
        be_list = 0x7f9940206300
        be = 0x6e6e30
        status = <optimized out>
        full_name = <optimized out>
        i = <optimized out>
        num_devs = <optimized out>
        len = <optimized out>
#9  0x00007f9955f81d25 in sane_get_devices (dl=dl@entry=0x7fffe415bc88, local=local@entry=1) at dll-s.c:17
No locals.
#10 0x0000000000402474 in cd_sane_client_refresh (priv=priv@entry=0x6d01c0) at cd-main.c:303
        tmp = <optimized out>
        device_list = 0x0
        i = <optimized out>
        status = <optimized out>
#11 0x000000000040281a in cd_main_colord_connect_cb (source_object=<optimized out>, res=<optimized out>, user_data=user_data@entry=0x6d01c0) at cd-main.c:446
        priv = 0x6d01c0
        ret = <optimized out>
        error = 0x0
#12 0x00007f9955c9174e in g_simple_async_result_complete (simple=0x6d8d70) at /build/buildd/glib2.0-2.33.10/./gio/gsimpleasyncresult.c:775
        current_source = <optimized out>
        current_context = <optimized out>
        __PRETTY_FUNCTION__ = "g_simple_async_result_complete"
#13 0x00007f9955c9187c in complete_in_idle_cb (data=0x6d8d70) at /build/buildd/glib2.0-2.33.10/./gio/gsimpleasyncresult.c:787
        simple = <optimized out>
#14 0x00007f995571fdb5 in g_main_dispatch (context=0x6d0200) at /build/buildd/glib2.0-2.33.10/./glib/gmain.c:2707
        dispatch = 0x7f995571d200 <g_idle_dispatch>
        was_in_call = 0
        user_data = 0x6d8d70
        callback = 0x7f9955c91860 <complete_in_idle_cb>
        cb_funcs = 0x7f99559cd9a0
        cb_data = 0x6e6e00
        current_source_link = {data = 0x6e6cb0, next = 0x0}
        need_destroy = <optimized out>
        source = 0x6e6cb0
        current = 0x6ce540
        i = <optimized out>
#15 g_main_context_dispatch (context=context@entry=0x6d0200) at /build/buildd/glib2.0-2.33.10/./glib/gmain.c:3211
No locals.
#16 0x00007f99557200e8 in g_main_context_iterate (context=0x6d0200, block=block@entry=1, dispatch=dispatch@entry=1, self=<error reading variable: Unhandled dwarf expression opcode 0xfa>) at /build/buildd/glib2.0-2.33.10/./glib/gmain.c:3282
        max_priority = 0
        timeout = 0
        some_ready = 1
        nfds = <optimized out>
        allocated_nfds = <optimized out>
        fds = 0x6ddca0
#17 0x00007f99557204e2 in g_main_loop_run (loop=0x6d0180) at /build/buildd/glib2.0-2.33.10/./glib/gmain.c:3476
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#18 0x0000000000401ee5 in main (argc=1, argv=0x7fffe415bfd8) at cd-main.c:617
        priv = 0x6d01c0
        immediate_exit = 0
        timed_exit = 0
        error = 0x0
        context = <optimized out>
        retval = 1
        options = {{long_name = 0x402c05 "timed-exit", short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_NONE, arg_data = 0x7fffe415be3c, description = 0x402c10 "Exit after a small delay", arg_description = 0x0}, {long_name = 0x402c29 "immediate-exit", short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_NONE, arg_data = 0x7fffe415be38, description = 0x402ce8 "Exit after the engine has loaded", arg_description = 0x0}, {long_name = 0x0, short_name = 0 '\000', flags = 0, arg = G_OPTION_ARG_NONE, arg_data = 0x0, description = 0x0, arg_description = 0x0}}