.
Thread 8 (Thread 0x7f486498f640 (LWP 3316)):
#0  __futex_abstimed_wait_common64 (cancel=true, private=0, abstime=0x0, clockid=0, expected=0, futex_word=0x55974dd5cb18) at ../sysdeps/nptl/futex-internal.c:74
        sc_cancel_oldtype = 0
        sc_ret = <optimized out>
        err = <optimized out>
        op = 393
#1  __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x55974dd5cb18, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0) at ../sysdeps/nptl/futex-internal.c:123
#2  0x00007f487e627520 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55974dd5cac8, cond=0x55974dd5caf0) at pthread_cond_wait.c:504
        spin = 0
        buffer = {__routine = 0x7f487e6271f0 <__condvar_cleanup_waiting>, __arg = 0x7f486498e910, __canceltype = 0, __prev = 0x0}
        cbuffer = {wseq = 6, cond = 0x55974dd5caf0, mutex = 0x55974dd5cac8, private = 0}
        err = <optimized out>
        g = 0
        flags = <optimized out>
        g1_start = <optimized out>
        signals = <optimized out>
        result = 0
        wseq = 6
        seq = 3
#3  __pthread_cond_wait (cond=0x55974dd5caf0, mutex=0x55974dd5cac8) at pthread_cond_wait.c:628
#4  0x00007f486ae7199b in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007f486ae7145b in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#6  0x00007f487e621430 in start_thread (arg=0x7f486498f640) at pthread_create.c:473
        ret = <optimized out>
        pd = 0x7f486498f640
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139948902118976, 4116638901624038984, 140727069463278, 140727069463279, 0, 139948902118976, -4057193006177262008, -4057249029480061368}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
#7  0x00007f487fa35d03 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
.
Thread 7 (Thread 0x7f4865991640 (LWP 3314)):
#0  __futex_abstimed_wait_common64 (cancel=true, private=0, abstime=0x0, clockid=0, expected=0, futex_word=0x55974dd5cb18) at ../sysdeps/nptl/futex-internal.c:74
        sc_cancel_oldtype = 0
        sc_ret = <optimized out>
        err = <optimized out>
        op = 393
#1  __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x55974dd5cb18, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0) at ../sysdeps/nptl/futex-internal.c:123
#2  0x00007f487e627520 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55974dd5cac8, cond=0x55974dd5caf0) at pthread_cond_wait.c:504
        spin = 0
        buffer = {__routine = 0x7f487e6271f0 <__condvar_cleanup_waiting>, __arg = 0x7f4865990910, __canceltype = 0, __prev = 0x0}
        cbuffer = {wseq = 2, cond = 0x55974dd5caf0, mutex = 0x55974dd5cac8, private = 0}
        err = <optimized out>
        g = 0
        flags = <optimized out>
        g1_start = <optimized out>
        signals = <optimized out>
        result = 0
        wseq = 2
        seq = 1
#3  __pthread_cond_wait (cond=0x55974dd5caf0, mutex=0x55974dd5cac8) at pthread_cond_wait.c:628
#4  0x00007f486ae7199b in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007f486ae7145b in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#6  0x00007f487e621430 in start_thread (arg=0x7f4865991640) at pthread_create.c:473
        ret = <optimized out>
        pd = 0x7f4865991640
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139948918904384, 4116638901624038984, 140727069463278, 140727069463279, 0, 139948918904384, -4057190797490330040, -4057249029480061368}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
#7  0x00007f487fa35d03 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
.
Thread 6 (Thread 0x7f487a2c3640 (LWP 3311)):
#0  0x00007f487fa2a1df in __GI___poll (fds=0x55974dcc45d0, nfds=2, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
        sc_ret = -516
        sc_cancel_oldtype = 0
#1  0x00007f487fb5f25e in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f487fb5f5e3 in g_main_loop_run () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f487ecf4bda in  () at /lib/x86_64-linux-gnu/libgio-2.0.so.0
#4  0x00007f487fb894a1 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f487e621430 in start_thread (arg=0x7f487a2c3640) at pthread_create.c:473
        ret = <optimized out>
        pd = 0x7f487a2c3640
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139949264090688, 4116638901624038984, 140727069463246, 140727069463247, 0, 139949264090688, -4057240660986894776, -4057249029480061368}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
#6  0x00007f487fa35d03 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
.
Thread 5 (Thread 0x7f487aac4640 (LWP 3310)):
#0  0x00007f487fa2a1df in __GI___poll (fds=0x55974dcb1760, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
        sc_ret = -516
        sc_cancel_oldtype = 0
#1  0x00007f487fb5f25e in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f487fb5f393 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f487fb5f3e1 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#4  0x00007f487fb894a1 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f487e621430 in start_thread (arg=0x7f487aac4640) at pthread_create.c:473
        ret = <optimized out>
        pd = 0x7f487aac4640
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139949272483392, 4116638901624038984, 140727069462878, 140727069462879, 0, 139949272483392, -4057241761035393464, -4057249029480061368}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
#6  0x00007f487fa35d03 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
.
Thread 4 (Thread 0x7f4878d84640 (LWP 3313)):
#0  __futex_abstimed_wait_common64 (cancel=true, private=0, abstime=0x0, clockid=0, expected=0, futex_word=0x55974dd5cb18) at ../sysdeps/nptl/futex-internal.c:74
        sc_cancel_oldtype = 0
        sc_ret = <optimized out>
        err = <optimized out>
        op = 393
#1  __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x55974dd5cb18, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0) at ../sysdeps/nptl/futex-internal.c:123
#2  0x00007f487e627520 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55974dd5cac8, cond=0x55974dd5caf0) at pthread_cond_wait.c:504
        spin = 0
        buffer = {__routine = 0x7f487e6271f0 <__condvar_cleanup_waiting>, __arg = 0x7f4878d83910, __canceltype = 0, __prev = 0x0}
        cbuffer = {wseq = 0, cond = 0x55974dd5caf0, mutex = 0x55974dd5cac8, private = 0}
        err = <optimized out>
        g = 0
        flags = <optimized out>
        g1_start = <optimized out>
        signals = <optimized out>
        result = 0
        wseq = 0
        seq = 0
#3  __pthread_cond_wait (cond=0x55974dd5caf0, mutex=0x55974dd5cac8) at pthread_cond_wait.c:628
#4  0x00007f486ae7199b in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007f486ae7145b in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#6  0x00007f487e621430 in start_thread (arg=0x7f4878d84640) at pthread_create.c:473
        ret = <optimized out>
        pd = 0x7f4878d84640
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139949241812544, 4116638901624038984, 140727069463278, 140727069463279, 0, 139949241812544, -4057236435275946424, -4057249029480061368}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
#7  0x00007f487fa35d03 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
.
Thread 3 (Thread 0x7f4865190640 (LWP 3315)):
#0  __futex_abstimed_wait_common64 (cancel=true, private=0, abstime=0x0, clockid=0, expected=0, futex_word=0x55974dd5cb18) at ../sysdeps/nptl/futex-internal.c:74
        sc_cancel_oldtype = 0
        sc_ret = <optimized out>
        err = <optimized out>
        op = 393
#1  __GI___futex_abstimed_wait_cancelable64 (futex_word=futex_word@entry=0x55974dd5cb18, expected=expected@entry=0, clockid=clockid@entry=0, abstime=abstime@entry=0x0, private=private@entry=0) at ../sysdeps/nptl/futex-internal.c:123
#2  0x00007f487e627520 in __pthread_cond_wait_common (abstime=0x0, clockid=0, mutex=0x55974dd5cac8, cond=0x55974dd5caf0) at pthread_cond_wait.c:504
        spin = 0
        buffer = {__routine = 0x7f487e6271f0 <__condvar_cleanup_waiting>, __arg = 0x7f486518f910, __canceltype = 0, __prev = 0x0}
        cbuffer = {wseq = 4, cond = 0x55974dd5caf0, mutex = 0x55974dd5cac8, private = 0}
        err = <optimized out>
        g = 0
        flags = <optimized out>
        g1_start = <optimized out>
        signals = <optimized out>
        result = 0
        wseq = 4
        seq = 2
#3  __pthread_cond_wait (cond=0x55974dd5caf0, mutex=0x55974dd5cac8) at pthread_cond_wait.c:628
#4  0x00007f486ae7199b in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#5  0x00007f486ae7145b in  () at /usr/lib/x86_64-linux-gnu/dri/iris_dri.so
#6  0x00007f487e621430 in start_thread (arg=0x7f4865190640) at pthread_create.c:473
        ret = <optimized out>
        pd = 0x7f4865190640
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139948910511680, 4116638901624038984, 140727069463278, 140727069463279, 0, 139948910511680, -4057189708179249592, -4057249029480061368}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
#7  0x00007f487fa35d03 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
.
Thread 2 (Thread 0x7f48798ef640 (LWP 3312)):
#0  0x00007f487fa2a1df in __GI___poll (fds=0x55974dd28550, nfds=1, timeout=-1) at ../sysdeps/unix/sysv/linux/poll.c:29
        sc_ret = -516
        sc_cancel_oldtype = 0
#1  0x00007f487fb5f25e in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#2  0x00007f487fb5f393 in g_main_context_iteration () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#3  0x00007f487ccd1f9d in  () at /usr/lib/x86_64-linux-gnu/gio/modules/libdconfsettings.so
#4  0x00007f487fb894a1 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#5  0x00007f487e621430 in start_thread (arg=0x7f48798ef640) at pthread_create.c:473
        ret = <optimized out>
        pd = 0x7f48798ef640
        unwind_buf = {cancel_jmp_buf = {{jmp_buf = {139949253785152, 4116638901624038984, 140727069465742, 140727069465743, 0, 139949253785152, -4057234907878201784, -4057249029480061368}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x0, 0x0}, data = {prev = 0x0, cleanup = 0x0, canceltype = 0}}}
        not_first_call = 0
#6  0x00007f487fa35d03 in clone () at ../sysdeps/unix/sysv/linux/x86_64/clone.S:95
.
Thread 1 (Thread 0x7f487d7b7000 (LWP 3309)):
#0  0x0000000000000000 in  ()
#1  0x00007f487fc92fda in process_event (bindings=<optimized out>, n_bindings=<optimized out>, display=display@entry=0x55974e29df80, screen=screen@entry=0x55974e299160, window=window@entry=0x0, event=event@entry=0x7ffd92fc63f0, keysym=65289, on_window=0, allow_release=0, mouse_grab_move=0) at core/keybindings.c:1582
        handler = 0x55974ddcd140
        i = <optimized out>
        mask = <optimized out>
#2  0x00007f487fc9538f in process_modifier_key (allow_key_up=<synthetic pointer>, have_window=<optimized out>, keysym=65289, event=0x7ffd92fc63f0, window=0x0, screen=0x55974e299160, display=0x55974e29df80) at core/keybindings.c:1627
        keysym = 65289
        keep_grab = <optimized out>
        all_keys_grabbed = 0
        handled = <optimized out>
        allow_key_up = 0
        mouse_grab_move = <optimized out>
        str = <optimized out>
        screen = 0x55974e299160
        __func__ = "meta_display_process_key_event"
#3  meta_display_process_key_event (display=display@entry=0x55974e29df80, window=window@entry=0x0, event=event@entry=0x7ffd92fc63f0) at core/keybindings.c:1736
        keysym = 65289
        keep_grab = <optimized out>
        all_keys_grabbed = 0
        handled = <optimized out>
        allow_key_up = 0
        mouse_grab_move = <optimized out>
        str = <optimized out>
        screen = 0x55974e299160
        __func__ = "meta_display_process_key_event"
#4  0x00007f487fc8a80a in event_callback (event=0x7ffd92fc63f0, data=0x55974e29df80) at core/display.c:1815
        window = <optimized out>
        property_for_window = <optimized out>
        display = 0x55974e29df80
        modified = <optimized out>
        frame_was_receiver = <optimized out>
        bypass_compositor = 0
        filter_out_event = <optimized out>
#5  0x00007f487fcd8eaa in filter_func (xevent=0x7ffd92fc63f0, event=<optimized out>, data=<optimized out>) at ui/ui.c:243
        display = 0x55974e29df80
        __func__ = "filter_func"
#6  0x00007f487efe187f in  () at /lib/x86_64-linux-gnu/libgdk-3.so.0
#7  0x00007f487efe1bb2 in  () at /lib/x86_64-linux-gnu/libgdk-3.so.0
#8  0x00007f487efa80f4 in gdk_display_get_event () at /lib/x86_64-linux-gnu/libgdk-3.so.0
#9  0x00007f487efe1916 in  () at /lib/x86_64-linux-gnu/libgdk-3.so.0
#10 0x00007f487fb5f01b in g_main_context_dispatch () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#11 0x00007f487fb5f2c8 in  () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#12 0x00007f487fb5f5e3 in g_main_loop_run () at /lib/x86_64-linux-gnu/libglib-2.0.so.0
#13 0x00007f487fc977d2 in meta_run () at core/main.c:619
        log_domains = {0x0, 0x7f487fce5178 "muffin", 0x7f487fce4188 "Gtk", 0x7f487fce418c "Gdk", 0x7f487fce4190 "Pango", 0x7f487fce4196 "GLib-GObject", 0x7f487fce41a3 "GThread"}
        i = 7
#14 0x000055974d340254 in main (argc=<optimized out>, argv=<optimized out>) at core/muffin.c:87
        ctx = 0x55974dc3ef10
        error = 0x0