.
Thread 2 (Thread 0x7f2c1a8b87c0 (LWP 6227)):
#0  0x00007f2c18c18dc3 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  0x00007f2c19154136 in g_main_context_poll (n_fds=3, fds=0x243db20, timeout=-1, context=0x2443830, priority=<optimized out>) at /build/buildd/glib2.0-2.31.18/./glib/gmain.c:3412
        poll_func = 0x7f2c19161090 <g_poll>
#2  g_main_context_iterate (dispatch=1, block=<optimized out>, context=0x2443830, self=<optimized out>) at /build/buildd/glib2.0-2.31.18/./glib/gmain.c:3113
        timeout = -1
        some_ready = <optimized out>
        fds = 0x243db20
        max_priority = 2147483647
        nfds = 3
        allocated_nfds = <optimized out>
#3  g_main_context_iterate (context=0x2443830, block=<optimized out>, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.31.18/./glib/gmain.c:3055
        some_ready = 38001440
#4  0x00007f2c1915459a in g_main_loop_run (loop=0x2444690) at /build/buildd/glib2.0-2.31.18/./glib/gmain.c:3312
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#5  0x0000000000409dc0 in daemon_main (argc=4, argv=<optimized out>, max_job_threads=1, default_type=0x40a07a "gphoto2", mountable_name=<optimized out>, first_type_name=0x40a07a "gphoto2") at daemon-main.c:300
        var_args = {{gp_offset = 48, fp_offset = 32767, overflow_arg_area = 0x7fff262c4f10, reg_save_area = 0x7fff262c4e90}}
        connection = <optimized out>
        loop = <optimized out>
        daemon = 0x24365e0
        derror = {name = 0x0, message = 0x0, dummy1 = 1, dummy2 = 0, dummy3 = 0, dummy4 = 0, dummy5 = 1, padding1 = 0x7f2c1916cf0c}
        mount_spec = 0x0
        mount_source = <optimized out>
        error = 0x0
        res = <optimized out>
        type = <optimized out>
#6  0x0000000000404564 in main (argc=4, argv=0x7fff262c5008) at daemon-main-generic.c:39
No locals.
.
Thread 1 (Thread 0x7f2c16656700 (LWP 6228)):
#0  __pthread_mutex_destroy (mutex=0x0) at pthread_mutex_destroy.c:28
No locals.
#1  0x00007f2c1918f3dc in g_mutex_impl_free (mutex=0x0) at /build/buildd/glib2.0-2.31.18/./glib/gthread-posix.c:112
No locals.
#2  g_mutex_clear (mutex=<optimized out>) at /build/buildd/glib2.0-2.31.18/./glib/gthread-posix.c:187
No locals.
#3  0x00000000004058a5 in release_device (gphoto2_backend=0x24480e0) at gvfsbackendgphoto2.c:621
        l = 0x0
#4  0x0000000000408eaa in do_mount (backend=<optimized out>, job=0x2449000, mount_spec=<optimized out>, mount_source=<optimized out>, is_automount=<optimized out>) at gvfsbackendgphoto2.c:1668
        fuse_name = <optimized out>
        display_name = <optimized out>
        icon_name = 0x0
        host = 0x2444ec0 "[usb:003,002]"
        gphoto2_backend = 0x24480e0
        error = 0x7f2c10001190
        gphoto2_mount_spec = <optimized out>
        rc = <optimized out>
        info = {type = GP_PORT_USB, name = "Universal Serial Bus", '\000' <repeats 43 times>, path = "usb:003,002\000\001\001\001\001\000\000\000\000\035\000\000\000\000\000\000\000\200Ne\026,\177\000\000\240Qe\026,\177\000\000\062", '\000' <repeats 18 times>, library_filename = "/usr/lib/x86_64-linux-gnu/libgphoto2_port/0.8.0/usb\000\200\213\000\020,\177\000\000\000\000\000\000\000\000\000\000\310z\266\030,\177\000\000\300Pe\026,\177\000\000\bP,&\377\177\000\000\377\377\377\377\000\000\000\000\001\000\000\200\000\000\000\000g\000\313\027,\177\000\000\000\360\213\032,\177\000\000\200\213\000\020,\177\000\000\240\273\215\032,\177", '\000' <repeats 11 times>"\360, \213\032,\177\000\000\320Oe\026,\177\000\000\232\023\306\030,\177\000\000\002", '\000' <repeats 23 times>, " \000\000\020,\177\000\000\000\000\000\000\000\000\000\000\200\213\000\020,\177\000\000\060\331\000\020\002\000\000\000\240Qe\026,\177\000\000\000\000\000\000\000\000\000\000"...}
        il = 0x7f2c10007440
        n = <optimized out>
        storage_info = <optimized out>
        num_storage_info = <optimized out>
        subsystems = {0x40a65c "usb", 0x0}
#5  0x00007f2c1a4a5082 in g_vfs_job_run (job=0x2449000) at gvfsjob.c:198
        class = 0x2447a00
#6  0x00007f2c19176038 in g_thread_pool_thread_proxy (data=<optimized out>) at /build/buildd/glib2.0-2.31.18/./glib/gthreadpool.c:309
        task = 0x2449000
        pool = 0x24447e0
#7  0x00007f2c191757d5 in g_thread_proxy (data=0x2446850) at /build/buildd/glib2.0-2.31.18/./glib/gthread.c:801
        thread = 0x2446850
#8  0x00007f2c18ef6e9a in start_thread (arg=0x7f2c16656700) at pthread_create.c:308
        __res = <optimized out>
        pd = 0x7f2c16656700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, 7159817514065840014, 140733833824720, 139827331033536, 0, 3, -7132324317057792114, -7132301277253089394}, 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"
#9  0x00007f2c18c2477d in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:112
No locals.
#10 0x0000000000000000 in ?? ()
No symbol table info available.