.
Thread 3 (Thread 0xb4a17b40 (LWP 4937)):
#0  0xb76ff424 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb68ad020 in __GI___poll (fds=0xb41023b0, nfds=3, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
        resultvar = <optimized out>
        oldtype = -516
        result = <optimized out>
#2  0xb6a2bb7b in g_poll (fds=0xb41023b0, nfds=3, timeout=-1) at /build/buildd/glib2.0-2.31.20/./glib/gpoll.c:132
No locals.
#3  0xb6a1e11e in g_main_context_poll (n_fds=3, fds=0xb41023b0, timeout=<optimized out>, context=0x840c450, priority=<optimized out>) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3412
        poll_func = 0xb6a2bb50 <g_poll>
#4  g_main_context_iterate (dispatch=1, block=-1230849200, context=0x840c450, self=<optimized out>) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3113
        timeout = -1
        some_ready = <optimized out>
        fds = 0xb41023b0
        max_priority = 2147483647
        nfds = 3
        allocated_nfds = <optimized out>
#5  g_main_context_iterate (context=0x840c450, block=-1230849200, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3055
        some_ready = 3
#6  0xb6a1e5db in g_main_loop_run (loop=0x840c428) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3312
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#7  0xb6bf998a in gdbus_shared_thread_func (user_data=0x840c438) at /build/buildd/glib2.0-2.31.20/./gio/gdbusprivate.c:277
        data = 0x840c438
#8  0xb6a41483 in g_thread_proxy (data=0x8409f50) at /build/buildd/glib2.0-2.31.20/./glib/gthread.c:801
        thread = 0x8409f50
#9  0xb697cd4c in start_thread (arg=0xb4a17b40) at pthread_create.c:308
        __res = <optimized out>
        pd = 0xb4a17b40
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {-1231495180, 0, 4001536, -1264487768, 936511444, 1521205200}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#10 0xb68bb76e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130
No locals.
Backtrace stopped: Not enough registers or memory available to unwind further
.
Thread 2 (Thread 0xb30d8b40 (LWP 4940)):
#0  0xb76ff424 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb68ad020 in __GI___poll (fds=0xb2500c78, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:87
        resultvar = <optimized out>
        oldtype = -516
        result = <optimized out>
#2  0xb6a2bb7b in g_poll (fds=0xb2500c78, nfds=1, timeout=-1) at /build/buildd/glib2.0-2.31.20/./glib/gpoll.c:132
No locals.
#3  0xb6a1e11e in g_main_context_poll (n_fds=1, fds=0xb2500c78, timeout=<optimized out>, context=0x8412878, priority=<optimized out>) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3412
        poll_func = 0xb6a2bb50 <g_poll>
#4  g_main_context_iterate (dispatch=1, block=-1230849200, context=0x8412878, self=<optimized out>) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3113
        timeout = -1
        some_ready = <optimized out>
        fds = 0xb2500c78
        max_priority = 2147483647
        nfds = 1
        allocated_nfds = <optimized out>
#5  g_main_context_iterate (context=0x8412878, block=-1230849200, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3055
        some_ready = 1
#6  0xb6a1e5db in g_main_loop_run (loop=0xb2500c68) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3312
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#7  0xb4a98124 in dconf_context_thread (data=0x8412878) at dconfcontext.c:11
        context = 0x8412878
        loop = <optimized out>
        __PRETTY_FUNCTION__ = "dconf_context_thread"
#8  0xb6a41483 in g_thread_proxy (data=0x840a060) at /build/buildd/glib2.0-2.31.20/./glib/gthread.c:801
        thread = 0x840a060
#9  0xb697cd4c in start_thread (arg=0xb30d8b40) at pthread_create.c:308
        __res = <optimized out>
        pd = 0xb30d8b40
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {-1231495180, 0, 4001536, -1290960216, 1848772571, 1521205200}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = <optimized out>
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#10 0xb68bb76e in clone () at ../sysdeps/unix/sysv/linux/i386/clone.S:130
No locals.
Backtrace stopped: Not enough registers or memory available to unwind further
.
Thread 1 (Thread 0xb4e59ac0 (LWP 4902)):
#0  0xb76ff424 in __kernel_vsyscall ()
No symbol table info available.
#1  0xb68001ef in __GI_raise (sig=6) at ../nptl/sysdeps/unix/sysv/linux/raise.c:64
        resultvar = <optimized out>
        resultvar = <optimized out>
        pid = -1231609868
        selftid = 4902
#2  0xb6803835 in __GI_abort () at abort.c:91
        save_stage = 2
        act = {__sigaction_handler = {sa_handler = 0x59, sa_sigaction = 0x59}, sa_mask = {__val = {88, 3062074044, 140727216, 89, 3214329252, 140727216, 0, 1, 3063357428, 3061821259, 3063361760, 3063361824, 3061817136, 3062161149, 4222451712, 140727216, 140727216, 140727216, 140727216, 140727304, 140727316, 140727216, 140727316, 0, 0, 0, 0, 0, 3061813013, 0, 3062994259, 134217728}}, sa_flags = 0, sa_restorer = 0}
        sigs = {__val = {32, 0 <repeats 31 times>}}
#3  0xb67f9095 in __assert_fail_base (fmt=0xb4c41698 <Address 0xb4c41698 out of bounds>, assertion=0xb7606d79 "ret != inval_id", file=0xb7606cea "../../src/xcb_io.c", line=528, function=0xb7606dfe "_XAllocID") at assert.c:94
        str = 0x86353b0 "P9_\bp$\227\266: ../../src/xcb_io.c:528: _XAllocID: asserzione \"ret != inval_id\" non riuscita.\n"
        total = 4096
#4  0xb67f9147 in __GI___assert_fail (assertion=0xb7606d79 "ret != inval_id", file=0xb7606cea "../../src/xcb_io.c", line=528, function=0xb7606dfe "_XAllocID") at assert.c:103
No locals.
#5  0xb758f50f in _XAllocID (dpy=0x833db70) at ../../src/xcb_io.c:528
        ret = 4294967295
        __PRETTY_FUNCTION__ = "_XAllocID"
#6  0xb756ce72 in XCreatePixmap (dpy=0x833db70, d=25165973, width=1280, height=800, depth=24) at ../../src/CrPixmap.c:56
        pid = <optimized out>
        req = 0x83442d8
#7  0xb6d58b65 in _cairo_xlib_surface_create_similar (abstract_src=0x85f3708, content=CAIRO_CONTENT_COLOR, width=1280, height=800) at /build/buildd/cairo-1.10.2/src/cairo-xlib-surface.c:393
        visual = <optimized out>
        src = 0x85f3708
        xrender_format = 0x837fb48
        surface = <optimized out>
        display = 0x860ccf8
        pix = <optimized out>
#8  0xb6d3a7e0 in _cairo_surface_create_similar_scratch (other=0x85f3708, content=CAIRO_CONTENT_COLOR, width=1280, height=800) at /build/buildd/cairo-1.10.2/src/cairo-surface.c:461
        surface = <optimized out>
#9  0xb6d3a88b in _cairo_surface_create_similar_solid (other=0x85f3708, content=CAIRO_CONTENT_COLOR, width=1280, height=800, color=0xb6d8d520, allow_fallback=1) at /build/buildd/cairo-1.10.2/src/cairo-surface.c:528
        status = <optimized out>
        surface = <optimized out>
        pattern = {base = {type = 3067822068, ref_count = {ref_count = 140295656}, status = 3069033128, user_data = {size = 0, num_elements = 3067049554, element_size = 140457768, elements = 0xbf96c774, is_snapshot = 1}, matrix = {xx = 2.3634895433998416e-268, yx = -4.1600806853144805e-44, xy = 2.3634895429116185e-268, yy = 1.5880898870822506e-314, x0 = 2.717670722416469e-311, y0 = 3.8823522081992183e-269}, filter = CAIRO_FILTER_GOOD, extend = 3064998486, has_component_alpha = -1225934168}, color = {red = -3.3179915630710933e-44, green = 6.9315263890361356e-316, blue = -1.1587365140371966e-44, alpha = -4.1659379275932728e-44, red_short = 48616, green_short = 2140, blue_short = 44432, alpha_short = 46823}}
#10 0xb6d3af04 in cairo_surface_create_similar (other=0x85f3708, content=CAIRO_CONTENT_COLOR, width=1280, height=800) at /build/buildd/cairo-1.10.2/src/cairo-surface.c:510
No locals.
#11 0xb6e8803c in gdk_window_create_similar_surface (window=0x85cbde8, content=CAIRO_CONTENT_COLOR, width=1280, height=800) at /build/buildd/gtk+3.0-3.3.18/./gdk/gdkwindow.c:10156
        window_surface = 0x85f3708
        surface = <optimized out>
        __PRETTY_FUNCTION__ = "gdk_window_create_similar_surface"
#12 0xb6e883a8 in gdk_window_begin_implicit_paint (rect=0xbf96c890, window=0x85cbde8) at /build/buildd/gtk+3.0-3.3.18/./gdk/gdkwindow.c:2717
        paint = 0x87f4000
#13 gdk_window_process_updates_internal (window=<optimized out>) at /build/buildd/gtk+3.0-3.3.18/./gdk/gdkwindow.c:4056
        expose_region = <optimized out>
        update_area = 0x8674128
        impl_class = <optimized out>
        save_region = 0
        clip_box = {x = 0, y = 0, width = 1280, height = 800}
#14 0xb6e886b5 in gdk_window_process_updates (window=0x85cbde8, update_children=0) at /build/buildd/gtk+3.0-3.3.18/./gdk/gdkwindow.c:4265
        impl_window = 0x85cbde8
        __PRETTY_FUNCTION__ = "gdk_window_process_updates"
#15 0xb769d5d3 in draw_background (fade=0x878f248) at gnome-bg-crossfade.c:386
No locals.
#16 0xb769da51 in on_tick (fade=0x878f248) at gnome-bg-crossfade.c:440
        now = <optimized out>
        percent_done = <optimized out>
        cr = 0xb6db4500
        status = CAIRO_STATUS_SUCCESS
        __PRETTY_FUNCTION__ = "on_tick"
#17 0xb6a1eaef in g_timeout_dispatch (source=0x864ada0, callback=0xb769d850 <on_tick>, user_data=0x878f248) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3854
        timeout_source = 0x864ada0
        again = <optimized out>
#18 0xb6a1dd8a in g_main_dispatch (context=0x8356f20) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:2510
        dispatch = 0xb6a1eac0 <g_timeout_dispatch>
        was_in_call = 0
        user_data = 0x878f248
        callback = 0xb769d850 <on_tick>
        cb_funcs = 0xb6acf4f8
        cb_data = 0x867afc8
        current_source_link = {data = 0x864ada0, next = 0x0}
        need_destroy = <optimized out>
        source = 0x864ada0
        current = 0x840d690
        i = <optimized out>
#19 g_main_context_dispatch (context=0x8356f20) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3047
No locals.
#20 0xb6a1e195 in g_main_context_iterate (dispatch=1, block=-1230849200, context=0x8356f20, self=<optimized out>) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3118
        timeout = 0
        some_ready = 1
        fds = 0x85d0370
        max_priority = 0
        nfds = <optimized out>
        allocated_nfds = <optimized out>
#21 g_main_context_iterate (context=0x8356f20, block=-1230849200, dispatch=1, self=<optimized out>) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3055
        some_ready = 1
#22 0xb6a1e271 in g_main_context_iteration (context=0x8356f20, may_block=1) at /build/buildd/glib2.0-2.31.20/./glib/gmain.c:3179
        retval = <optimized out>
#23 0xb6bc0314 in g_application_run (application=0x831e000, argc=2, argv=0xbf96cbc4) at /build/buildd/glib2.0-2.31.20/./gio/gapplication.c:1496
        arguments = 0x8319a30
        status = 0
        i = <optimized out>
        __PRETTY_FUNCTION__ = "g_application_run"
#24 0x08068068 in main (argc=2, argv=0xbf96cbc4) at nautilus-main.c:101
        retval = <optimized out>
        application = 0x831e000