Program received signal SIGSEGV, Segmentation fault.
0x000000000040846d in output_handle_geometry (data=0x191bc30, wl_output=0x19659d0, x=1366, y=0, physical_width=160, physical_height=90, subpixel=0,
    make=0x1922d40 "SAM", model=0x1922d48 "SyncMaster", transform=0) at desktop-shell.c:1095
1095            window_set_buffer_transform(output->panel->window, transform);
(gdb) inspect transform
$1 = 0
(gdb) inspect output
$2 = (struct output *) 0x191bc30
(gdb) inspect output->panel
$3 = (struct panel *) 0x0
(gdb) bt full
#0  0x000000000040846d in output_handle_geometry (data=0x191bc30, wl_output=0x19659d0, x=1366, y=0, physical_width=160, physical_height=90, subpixel=0,
    make=0x1922d40 "SAM", model=0x1922d48 "SyncMaster", transform=0) at desktop-shell.c:1095
        output = 0x191bc30
#1  0x0000003765e05e90 in ffi_call_unix64 () from /lib64/libffi.so.5
No symbol table info available.
#2  0x0000003765e058a0 in ffi_call () from /lib64/libffi.so.5
No symbol table info available.
#3  0x00007f1f1888f59c in wl_closure_invoke (closure=0x1922c50, flags=1, target=0x19659d0, opcode=0, data=0x191bc30) at connection.c:887
        count = 8
        ffi_types = {0x3765e06180, 0x3765e06180, 0x3765e061e0, 0x3765e061e0, 0x3765e061e0, 0x3765e061e0, 0x3765e061e0, 0x3765e06180, 0x3765e06180, 0x3765e061e0,
          0x7c00000077, 0x7fffa1a11bd0, 0x7fffa1a11c00, 0x7f1f1888cbf4, 0x7fffa1a11c50, 0x8, 0x1915ae0, 0x18a6de0, 0xd8, 0x1ac00405260, 0x7fffa1a11c30, 0x7f1f1888cf04}
        implementation = 0x41e940
        cif = {abi = FFI_UNIX64, nargs = 10, arg_types = 0x7fffa1a11b60, rtype = 0x3765e062a0, bytes = 32, flags = 0}
        ffi_args = {0x7fffa1a11b20, 0x7fffa1a11b28, 0x1922c68, 0x1922c70, 0x1922c78, 0x1922c80, 0x1922c88, 0x1922c90, 0x1922c98, 0x1922ca0, 0xa1a11c69,
          0x7f1f18891afd, 0x7fffa1a11ca0, 0x7f1f18891afc, 0x7fffa1a11cd0, 0x7f1f188889ef, 0x7fffa1a11cd0, 0x1922c50, 0xa1a12069, 0x0, 0x0, 0x8188902bf}
#4  0x00007f1f18888b90 in dispatch_event (display=0x18a6c60, queue=0x18a6ce8) at wayland-client.c:855
        closure = 0x1922c50
        proxy = 0x19659d0
        opcode = 0
        proxy_destroyed = false
#5  0x00007f1f18888e67 in dispatch_queue (display=0x18a6c60, queue=0x18a6ce8) at wayland-client.c:943
        count = 29
#6  0x00007f1f188891e8 in wl_display_dispatch_queue (display=0x18a6c60, queue=0x18a6ce8) at wayland-client.c:1120
        pfd = {{fd = 54, events = 1, revents = 1}, {fd = 25849080, events = 0, revents = 0}}
        ret = 0
#7  0x00007f1f18889309 in wl_display_dispatch (display=0x18a6c60) at wayland-client.c:1190
No locals.
#8  0x0000000000418bd7 in handle_display_data (task=0x18a6b88, events=1) at window.c:4933
        display = 0x18a6b10
        ep = {events = 2711690736, data = {ptr = 0x18a6c6000007fff, fd = 32767, u32 = 32767, u64 = 111020300396691455}}
        ret = 0
#9  0x0000000000419a08 in display_run (display=0x18a6b10) at window.c:5248
        i = 0
        count = 1
        ret = 72
        task = 0x18a6b88
        ep = {{events = 1, data = {ptr = 0x18a6b88, fd = 25848712, u32 = 25848712, u64 = 25848712}}, {events = 0, data = {ptr = 0x0, fd = 0, u32 = 0, u64 = 0}}, {
            events = 0, data = {ptr = 0x0, fd = 0, u32 = 0, u64 = 0}}, {events = 0, data = {ptr = 0x10000000, fd = 268435456, u32 = 268435456, u64 = 268435456}}, {
            events = 0, data = {ptr = 0xa1a1207000000000, fd = 0, u32 = 0, u64 = 11646625776765239296}}, {events = 32767, data = {ptr = 0x0, fd = 0, u32 = 0,
              u64 = 0}}, {events = 0, data = {ptr = 0x500000000, fd = 0, u32 = 0, u64 = 21474836480}}, {events = 0, data = {ptr = 0x0, fd = 0, u32 = 0, u64 = 0}}, {
            events = 1, data = {ptr = 0x630212a800007fff, fd = 32767, u32 = 32767, u64 = 7134285272472125439}}, {events = 55, data = {ptr = 0x8, fd = 8, u32 = 8,
              u64 = 8}}, {events = 25849008, data = {ptr = 0x18ad5f000000000, fd = 0, u32 = 0, u64 = 111136367592865792}}, {events = 0, data = {ptr = 0x98, fd = 152,
              u32 = 152, u64 = 152}}, {events = 0, data = {ptr = 0x6302160000000000, fd = 0, u32 = 0, u64 = 7134288948964098048}}, {events = 55, data = {
---Type <return> to continue, or q <return> to quit---
              ptr = 0x7fffa1a11dc0, fd = -1583276608, u32 = 2711690688, u64 = 140735905078720}}, {events = 2711690656, data = {ptr = 0xa1a1207000007fff, fd = 32767,
              u32 = 32767, u64 = 11646625776765272063}}, {events = 32767, data = {ptr = 0x7f1f1790d220, fd = 395366944, u32 = 395366944, u64 = 139771516080672}}}
#10 0x0000000000408ae6 in main (argc=1, argv=0x7fffa1a12078) at desktop-shell.c:1245
        desktop = {display = 0x18a6b10, shell = 0x18ba1c0, interface_version = 2, unlock_dialog = 0x1983250, unlock_task = {run = 0x407d3b <unlock_dialog_finish>,
            link = {prev = 0x0, next = 0x0}}, outputs = {prev = 0x18ac7e8, next = 0x191bc38}, grab_window = 0x18ad410, grab_widget = 0x18ad630,
          grab_cursor = CURSOR_BOTTOM_LEFT, painted = 1}
        config_fd = 8
        output = 0x7fffa1a11f40
        ret = 0
(gdb)
(gdb)