#0  0x00007f66c8bd187a in ping_timeout_handler (data=0x12e1710) at shell.c:1288
        shsurf = 0x12e1710
        seat = 0x1266d30
#1  0x00007f66cc75aea2 in wl_event_source_timer_dispatch (source=0x118d0a0, 
    ep=0x7fffbb71f610) at event-loop.c:173
        timer_source = 0x118d0a0
        expires = 1
        len = 8
#2  0x00007f66cc75b5ad in wl_event_loop_dispatch (loop=0xff59c0, timeout=-1)
    at event-loop.c:410
        ep = {{events = 1, data = {ptr = 0x118d0a0, fd = 18403488, 
              u32 = 18403488, u64 = 18403488}}, {events = 49, data = {
              ptr = 0x0, fd = 0, u32 = 0, u64 = 0}}, {events = 3434544480, 
            data = {ptr = 0xbb71f68000007f66, fd = 32614, u32 = 32614, 
              u64 = 13506847787077107558}}, {events = 32767, data = {
              ptr = 0x7fffbb71f660, fd = -1150159264, u32 = 3144808032, 
              u64 = 140736338196064}}, {events = 0, data = {ptr = 0x0, fd = 0, 
              u32 = 0, u64 = 0}}, {events = 0, data = {ptr = 0xb5e4e1d1, 
              fd = -1243291183, u32 = 3051676113, u64 = 3051676113}}, {
            events = 3430231186, data = {ptr = 0xffffffff00007f66, fd = 32614, 
              u32 = 32614, u64 = 18446744069414616934}}, {events = 0, data = {
              ptr = 0x0, fd = 0, u32 = 0, u64 = 0}}, {events = 327306929, 
            data = {ptr = 0x4028bc00000000, fd = 0, u32 = 0, 
              u64 = 18059186428444672}}, {events = 0, data = {
              ptr = 0x7f66cc752080, fd = -864739200, u32 = 3430228096, 
              u64 = 140079493619840}}, {events = 3434543624, data = {
              ptr = 0xca84ca8000007f66, fd = 32614, u32 = 32614, 
              u64 = 14593011343691906918}}, {events = 32614, data = {
              ptr = 0x61e7c8, fd = 6416328, u32 = 6416328, u64 = 6416328}}, {
            events = 3430227256, data = {ptr = 0xccb6fa0800007f66, fd = 32614, 
              u32 = 32614, u64 = 14751252541765353318}}, {events = 32614, 
            data = {ptr = 0x7fffbb71f700, fd = -1150159104, u32 = 3144808192, 
              u64 = 140736338196224}}, {events = 6416496, data = {ptr = 0x0, 
              fd = 0, u32 = 0, u64 = 0}}, {events = 0, data = {
              ptr = 0x7fffbb71faf0, fd = -1150158096, u32 = 3144809200, 
              u64 = 140736338197232}}, {events = 0, data = {ptr = 0x0, fd = 0, 
              u32 = 0, u64 = 0}}, {events = 0, data = {ptr = 0x7fffbb71f7b0, 
              fd = -1150158928, u32 = 3144808368, u64 = 140736338196400}}, {
            events = 3330335460, data = {ptr = 0x100000031, fd = 49, u32 = 49, 
              u64 = 4294967345}}, {events = 0, data = {ptr = 0x7f66cc962be8, 
              fd = -862573592, u32 = 3432393704, u64 = 140079495785448}}, {
            events = 0, data = {ptr = 0xbb71faf000000000, fd = 0, u32 = 0, 
              u64 = 13506852666159923200}}, {events = 32767, data = {
              ptr = 0x0, fd = 0, u32 = 0, u64 = 0}}, {events = 0, data = {
              ptr = 0xbb71f7d000000000, fd = 0, u32 = 0, 
              u64 = 13506849230186086400}}, {events = 32767, data = {
              ptr = 0x31c680e2e4, fd = -964631836, u32 = 3330335460, 
              u64 = 213783732964}}, {events = 1, data = {ptr = 0x0, fd = 0, 
              u32 = 0, u64 = 0}}, {events = 0, data = {ptr = 0x7f66cc752080, 
              fd = -864739200, u32 = 3430228096, u64 = 140079493619840}}, {
            events = 3330335460, data = {ptr = 0x31, fd = 49, u32 = 49, 
              u64 = 49}}, {events = 0, data = {ptr = 0x7fffbb71f7d0, 
              fd = -1150158896, u32 = 3144808400, u64 = 140736338196432}}, {
            events = 4219552, data = {ptr = 0xc681491500000000, fd = 0, 
              u32 = 0, u64 = 14303794246048546816}}, {events = 49, data = {
              ptr = 0xff59c0, fd = 16734656, u32 = 16734656, u64 = 16734656}}, 
          {events = 3335463306, data = {ptr = 0xbb71f78000000031, fd = 49, 
              u32 = 49, u64 = 13506848886588702769}}, {events = 32767, data = {
              ptr = 0xffffffff, fd = -1, u32 = 4294967295, u64 = 4294967295}}}
        source = 0x118d0a0
        i = 0
        count = 1
        n = 0
#3  0x00007f66cc758b8c in wl_display_run (display=0xff5970)
    at wayland-server.c:1107
No locals.
#4  0x000000000040dfb7 in main (argc=1, argv=0x7fffbb71faf8)
    at compositor.c:3133
        ret = 0
        display = 0xff5970
        ec = 0xff7850
        signals = {0xff5a40, 0xff5a90, 0xff6230, 0xff6280}
        loop = 0xff59c0
        segv_action = {__sigaction_handler = {
            sa_handler = 0x40d56e <on_segv_signal>, 
            sa_sigaction = 0x40d56e <on_segv_signal>}, sa_mask = {__val = {
              0 <repeats 16 times>}}, sa_flags = -2147483644, 
          sa_restorer = 0x31c6a212a8}
        backend_init = 0x7f66ca63b190 <backend_init>
        i = 1
        backend = 0x4189b3 "drm-backend.so"
        modules = 0x41886b "desktop-shell.so"
        option_modules = 0x0
        log = 0x0
        idle_time = 300
        help = 0
        socket_name = 0x41887c "wayland-0"
        config_file = 0xff5ae0 "WAYLAND_DISPLAY=wayland-0"
        core_config_keys = {{name = 0x418886 "modules", 
            type = CONFIG_KEY_STRING, data = 0x7fffbb71f910}}
        cs = {{name = 0x41888e "core", keys = 0x7fffbb71f8d0, num_keys = 1, 
            done = 0}}
        core_options = {{type = WESTON_OPTION_STRING, 
            name = 0x418893 "backend", short_name = 66, 
            data = 0x7fffbb71f918}, {type = WESTON_OPTION_STRING, 
            name = 0x41889b "socket", short_name = 83, data = 0x7fffbb71f8f0}, 
          {type = WESTON_OPTION_INTEGER, name = 0x4188a2 "idle-time", 
            short_name = 105, data = 0x7fffbb71f8fc}, {
            type = WESTON_OPTION_STRING, name = 0x418886 "modules", 
            short_name = 0, data = 0x7fffbb71f908}, {
            type = WESTON_OPTION_STRING, name = 0x4188ac "log", 
            short_name = 0, data = 0x7fffbb71f900}, {
            type = WESTON_OPTION_BOOLEAN, name = 0x4188b0 "help", 
            short_name = 104, data = 0x7fffbb71f8f8}}