Program received signal SIGSEGV, Segmentation fault.
cogl_object_unref (object=0x0) at ./cogl-object.c:61
61	  if (--obj->ref_count < 1)
(gdb) thread apply all bt full

Thread 6 (Thread 0x7f36f6b20700 (LWP 23745)):
#0  pthread_cond_timedwait@@GLIBC_2.3.2 ()
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_timedwait.S:216
No locals.
#1  0x000000394ce024b5 in g_cond_timed_wait_posix_impl (cond=<optimized out>, 
    entered_mutex=<optimized out>, abs_time=<optimized out>)
    at gthread-posix.c:242
        result = <optimized out>
        end_time = {tv_sec = 1315954436, tv_nsec = 802727000}
        timed_out = <optimized out>
        __PRETTY_FUNCTION__ = "g_cond_timed_wait_posix_impl"
#2  0x000000394c6195ef in g_async_queue_pop_intern_unlocked (queue=0x18e4820, 
    try=0, end_time=0x7f36f6b1fbb0) at gasyncqueue.c:415
        retval = <optimized out>
        __PRETTY_FUNCTION__ = "g_async_queue_pop_intern_unlocked"
#3  0x000000394c619e41 in g_async_queue_timed_pop (queue=0x18e4820, 
    end_time=<optimized out>) at gasyncqueue.c:536
        retval = <optimized out>
        __PRETTY_FUNCTION__ = "g_async_queue_timed_pop"
#4  0x000000394c66c7f7 in g_thread_pool_wait_for_new_pool ()
    at gthreadpool.c:175
        end_time = {tv_sec = 1315954436, tv_usec = 802727}
---Type <return> to continue, or q <return> to quit---
        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 gthreadpool.c:378
        free_pool = <optimized out>
        task = <optimized out>
        pool = <optimized out>
#6  0x000000394c66a3b6 in g_thread_create_proxy (data=0x243d200)
    at gthread.c:1962
        thread = 0x243d200
        __PRETTY_FUNCTION__ = "g_thread_create_proxy"
#7  0x000000394aa07d11 in start_thread (arg=0x7f36f6b20700)
    at pthread_create.c:305
        __res = <optimized out>
        pd = 0x7f36f6b20700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {1, -2042927048319189384, 
                140735070892928, 139874043824576, 35468048, 3, 
                2147088715531796088, -2029850280706195848}, 
              mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, 
---Type <return> to continue, or q <return> to quit---
            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  0x000000394a6eb66d in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115
No locals.

Thread 5 (Thread 0x7f3711344700 (LWP 23714)):
#0  0x000000394a6e2bd3 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  0x000000394c644fa8 in g_main_context_poll (n_fds=1, fds=0x7f370c001170, 
    priority=<optimized out>, timeout=-1, context=0x1849250) at gmain.c:3402
        poll_func = 0x394c6533f0 <g_poll>
#2  g_main_context_iterate (context=0x1849250, block=<optimized out>, 
    dispatch=1, self=<optimized out>) at gmain.c:3084
        max_priority = 2147483647
---Type <return> to continue, or q <return> to quit---
        timeout = -1
        some_ready = <optimized out>
        nfds = 1
        allocated_nfds = <optimized out>
        fds = 0x7f370c001170
        __PRETTY_FUNCTION__ = "g_main_context_iterate"
#3  0x000000394c6457e5 in g_main_loop_run (loop=0x7f370c001150) at gmain.c:3297
        self = 0x1848e30
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#4  0x00007f3711349c0b in dconf_context_thread (data=0x1849250)
    at dconfcontext.c:11
        context = 0x1849250
        loop = <optimized out>
        __PRETTY_FUNCTION__ = "dconf_context_thread"
#5  0x000000394c66a3b6 in g_thread_create_proxy (data=0x1848e30)
    at gthread.c:1962
        thread = 0x1848e30
        __PRETTY_FUNCTION__ = "g_thread_create_proxy"
#6  0x000000394aa07d11 in start_thread (arg=0x7f3711344700)
    at pthread_create.c:305
        __res = <optimized out>
        pd = 0x7f3711344700
        now = <optimized out>
---Type <return> to continue, or q <return> to quit---
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -2042927048319189384, 
                140735070897920, 139874488568256, 0, 3, 2146021040349101688, 
                -2029850280706195848}, 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  0x000000394a6eb66d in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115
No locals.

Thread 4 (Thread 0x7f3710b43700 (LWP 23715)):
#0  0x000000394a6e2bd3 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  0x000000394c644fa8 in g_main_context_poll (n_fds=5, fds=0x7f3704006200, 
    priority=<optimized out>, timeout=-1, context=0x7f370c00c6d0)
---Type <return> to continue, or q <return> to quit---
    at gmain.c:3402
        poll_func = 0x394c6533f0 <g_poll>
#2  g_main_context_iterate (context=0x7f370c00c6d0, block=<optimized out>, 
    dispatch=1, self=<optimized out>) at gmain.c:3084
        max_priority = 2147483647
        timeout = -1
        some_ready = <optimized out>
        nfds = 5
        allocated_nfds = <optimized out>
        fds = 0x7f3704006200
        __PRETTY_FUNCTION__ = "g_main_context_iterate"
#3  0x000000394c6457e5 in g_main_loop_run (loop=0x7f370c00c680) at gmain.c:3297
        self = 0x7f370c00c7c0
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#4  0x000000394dec7706 in gdbus_shared_thread_func (user_data=0x7f370c00c6a0)
    at gdbusprivate.c:276
        data = 0x7f370c00c6a0
#5  0x000000394c66a3b6 in g_thread_create_proxy (data=0x7f370c00c7c0)
    at gthread.c:1962
        thread = 0x7f370c00c7c0
        __PRETTY_FUNCTION__ = "g_thread_create_proxy"
#6  0x000000394aa07d11 in start_thread (arg=0x7f3710b43700)
    at pthread_create.c:305
---Type <return> to continue, or q <return> to quit---
        __res = <optimized out>
        pd = 0x7f3710b43700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -2042927048319189384, 
                139874488563744, 139874480175552, 0, 3, 2146019941374344824, 
                -2029850280706195848}, 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  0x000000394a6eb66d in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115
No locals.

Thread 3 (Thread 0x7f370bfff700 (LWP 23716)):
#0  0x000000394a6e2bd3 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
---Type <return> to continue, or q <return> to quit---
        result = <optimized out>
#1  0x0000003dbb42c08f in poll_func (ufds=0x7f36f8001460, nfds=2, timeout=-1, 
    userdata=0x1865ce0) at pulse/thread-mainloop.c:75
        mutex = 0x1865ce0
        r = <optimized out>
#2  0x0000003dbb41df06 in pa_mainloop_poll (m=0x186f690)
    at pulse/mainloop.c:879
        __func__ = "pa_mainloop_poll"
        __PRETTY_FUNCTION__ = "pa_mainloop_poll"
#3  0x0000003dbb41e539 in pa_mainloop_iterate (m=0x186f690, 
    block=<optimized out>, retval=0x0) at pulse/mainloop.c:961
        r = <optimized out>
        __func__ = "pa_mainloop_iterate"
        __PRETTY_FUNCTION__ = "pa_mainloop_iterate"
#4  0x0000003dbb41e5f0 in pa_mainloop_run (m=0x186f690, retval=0x0)
    at pulse/mainloop.c:979
        r = <optimized out>
#5  0x0000003dbb42c03f in thread (userdata=0x1865f00)
    at pulse/thread-mainloop.c:94
        m = 0x1865f00
        mask = {__val = {18446744067267100671, 
            18446744073709551615 <repeats 15 times>}}
#6  0x0000003dbb838be8 in internal_thread_func (userdata=0x1865d80)
---Type <return> to continue, or q <return> to quit---
    at pulsecore/thread-posix.c:83
        t = 0x1865d80
#7  0x000000394aa07d11 in start_thread (arg=0x7f370bfff700)
    at pthread_create.c:305
        __res = <optimized out>
        pd = 0x7f370bfff700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {0, -2042927048319189384, 
                246065205152, 139874401253824, 0, 3, 2145973278702157432, 
                -2029850280706195848}, 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  0x000000394a6eb66d in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115
No locals.

Thread 2 (Thread 0x7f370b7fe700 (LWP 23717)):
#0  pthread_cond_wait@@GLIBC_2.3.2 ()
---Type <return> to continue, or q <return> to quit---
    at ../nptl/sysdeps/unix/sysv/linux/x86_64/pthread_cond_wait.S:165
No locals.
#1  0x0000003957623020 in PR_WaitCondVar (cvar=0x18e1110, timeout=4294967295)
    at ../../../mozilla/nsprpub/pr/src/pthreads/ptsynch.c:417
        rv = <optimized out>
        thred = 0x18e11b0
#2  0x0000003db8cb5ab7 in js::GCHelperThread::threadLoop (this=0x1879e78, 
    rt=0x1879c00) at jsgc.cpp:2084
        lock = {rt = 0x1879c00}
#3  0x00000039576283b3 in _pt_root (arg=0x18e11b0)
    at ../../../mozilla/nsprpub/pr/src/pthreads/ptthread.c:187
        thred = 0x18e11b0
        detached = 0
#4  0x000000394aa07d11 in start_thread (arg=0x7f370b7fe700)
    at pthread_create.c:305
        __res = <optimized out>
        pd = 0x7f370b7fe700
        now = <optimized out>
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {1, -2042927048319189384, 
                140735070896656, 139874392861120, 0, 3, 2145972179727400568, 
                -2029850280706195848}, mask_was_saved = 0}}, priv = {pad = {
              0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, 
              canceltype = 0}}}
---Type <return> to continue, or q <return> to quit---
        not_first_call = 0
        pagesize_m1 = <optimized out>
        sp = <optimized out>
        freesize = <optimized out>
        __PRETTY_FUNCTION__ = "start_thread"
#5  0x000000394a6eb66d in clone ()
    at ../sysdeps/unix/sysv/linux/x86_64/clone.S:115
No locals.

Thread 1 (Thread 0x7f371ac029c0 (LWP 23712)):
#0  cogl_object_unref (object=0x0) at ./cogl-object.c:61
        obj = 0x0
#1  0x00007f371b19c9ff in meta_shaped_texture_dirty_mask (stex=<optimized out>)
    at compositor/meta-shaped-texture.c:180
        priv = 0x25e4450
#2  0x00007f371b19d8b6 in meta_shaped_texture_set_shape_region (
    stex=0x25e4030, region=0x0) at compositor/meta-shaped-texture.c:709
        priv = 0x25e4450
        __PRETTY_FUNCTION__ = "meta_shaped_texture_set_shape_region"
#3  0x00007f371b1a0ece in check_needs_reshape (self=0x25e3bc0)
    at compositor/meta-window-actor.c:2177
        screen = <optimized out>
        borders = {visible = {left = 0, right = 0, top = 0, bottom = 0}, 
---Type <return> to continue, or q <return> to quit---
          invisible = {left = 14425, right = -19264, top = 61, bottom = 0}, 
          total = {left = 6208, right = 350, top = 0, bottom = 0}}
        region = <optimized out>
        priv = 0x25e3f70
        display = 0x1955050
#4  meta_window_actor_pre_paint (self=0x25e3bc0)
    at compositor/meta-window-actor.c:2306
        priv = <optimized out>
        screen = <optimized out>
        display = <optimized out>
        xdisplay = <optimized out>
#5  0x00007f371b196fc8 in pre_paint_windows (info=<optimized out>)
    at compositor/compositor.c:1177
        l = 0x25e5860
        top_window = 0x224e2a0
        expected_unredirected_window = 0x0
#6  meta_repaint_func (data=<optimized out>) at compositor/compositor.c:1194
        screen = <optimized out>
        info = <optimized out>
        compositor = <optimized out>
        screens = <optimized out>
        l = 0x19dc2a0
#7  0x00007f371aec8035 in _clutter_run_repaint_functions ()
---Type <return> to continue, or q <return> to quit---
    at ./clutter-main.c:2976
        res = 0
        context = 0x15b7ec0
        repaint_func = 0x197b540
        invoke_list = 0x25af2c0
        reinvoke_list = <optimized out>
        l = 0x24b76a0
#8  0x00007f371aec89bd in clutter_clock_dispatch (source=<optimized out>, 
    callback=<optimized out>, user_data=<optimized out>)
    at ./clutter-master-clock.c:367
        clock_source = <optimized out>
        master_clock = 0x16df880
        stage_manager = <optimized out>
        stages_updated = 0
        stages = 0x25e0fa0
        l = <optimized out>
#9  0x000000394c644a9d in g_main_dispatch (context=0x15bcc50) at gmain.c:2441
        dispatch = 0x7f371aec8900 <clutter_clock_dispatch>
        was_in_call = 0
        user_data = 0x0
        callback = 0
        cb_funcs = 0x0
        cb_data = 0x0
---Type <return> to continue, or q <return> to quit---
        current_source_link = {data = 0x1859af0, next = 0x0}
        need_destroy = <optimized out>
        source = 0x1859af0
        current = 0x19dc260
        i = <optimized out>
#10 g_main_context_dispatch (context=0x15bcc50) at gmain.c:3011
No locals.
#11 0x000000394c645298 in g_main_context_iterate (context=0x15bcc50, 
    block=<optimized out>, dispatch=1, self=<optimized out>) at gmain.c:3089
        max_priority = 150
        timeout = 0
        some_ready = 1
        nfds = 14
        allocated_nfds = <optimized out>
        fds = <optimized out>
        __PRETTY_FUNCTION__ = "g_main_context_iterate"
#12 0x000000394c6457e5 in g_main_loop_run (loop=0x15bf400) at gmain.c:3297
        self = 0x15aa0e0
        __PRETTY_FUNCTION__ = "g_main_loop_run"
#13 0x00007f371b1b7721 in meta_run () at core/main.c:555
        log_domains = {0x0, 0x7f371b1febcf "mutter", 0x7f371b1febfa "Gtk", 
          0x7f371b1febfe "Gdk", 0x7f371b1fec02 "GLib", 0x7f371b1fec07 "Pango", 
          0x7f371b1fec0d "GLib-GObject", 0x7f371b1fec1a "GThread"}
---Type <return> to continue, or q <return> to quit---
        i = <optimized out>
#14 0x00000000004029f1 in main (argc=1, argv=0x7fff6fe88cb8) at main.c:571
        ctx = <optimized out>
        error = 0x0
        session_type = <optimized out>
        ecode = <optimized out>
        sender = 0x185be00
(gdb) 

