This fixes the following crash:
#0 0x00007f7daac3af25 in raise () at /usr/lib/libc.so.6
#1 0x00007f7daac24897 in abort () at /usr/lib/libc.so.6
#2 0x00007f7daac24767 in _nl_load_domain.cold () at /usr/lib/libc.so.6
#3 0x00007f7daac33526 in () at /usr/lib/libc.so.6
#4 0x0000555bfbc35029 in seat_set_focus_layer (seat=0x555bfd76d860, layer=0x555bfdda2ff0)
at ../sway/input/seat.c:1164
__PRETTY_FUNCTION__ = "seat_set_focus_layer"
__PRETTY_FUNCTION__ = "seat_set_focus_layer"
#5 0x0000555bfbc35029 in seat_set_focus_layer (seat=seat@entry=0x555bfd76d860, layer=0x555bfdda2ff0)
at ../sway/input/seat.c:1164
__PRETTY_FUNCTION__ = "seat_set_focus_layer"
#6 0x0000555bfbc25899 in handle_output_destroy (listener=0x555bfdb90688, data=<optimized out>)
at ../sway/desktop/layer_shell.c:263
layer = 0x555bfdd6b040
sway_layer = 0x555bfdb90610
seat = 0x555bfd76d860
client = 0x555bfdb76d70
set_focus = <optimized out>
#7 0x0000555bfbc5b669 in wl_signal_emit (data=0x555bfd795930, signal=0x555bfd795ae0)
at /usr/include/wayland-server-core.h:472
l = <optimized out>
next = 0x555bfdb6a3e8
__PRETTY_FUNCTION__ = "output_disable"
index = <optimized out>
#8 0x0000555bfbc5b669 in output_disable (output=output@entry=0x555bfd795930)
at ../sway/tree/output.c:263
__PRETTY_FUNCTION__ = "output_disable"
index = <optimized out>
#9 0x0000555bfbc3b890 in apply_output_config (oc=0x555bfd7d73d0, output=output@entry=0x555bfd795930)
at ../sway/config/output.c:321
wlr_output = 0x555bfd7afaf0
scale = <optimized out>
output_box = <optimized out>
#10 0x0000555bfbc28309 in handle_output_manager_apply
(listener=0x555bfbc7f148 <server+488>, data=0x555bfdca6eb0) at ../sway/desktop/output.c:936
wlr_output = <optimized out>
output = 0x555bfd795930
oc = <optimized out>
server = 0x555bfbc7ef60 <server>
config = 0x555bfdca6eb0
config_head = 0x555bfdb79350
ok = true
#11 0x00007f7dab4fbf7c in wlr_signal_emit_safe (signal=<optimized out>, data=0x555bfdca6eb0)
at ../subprojects/wlroots/util/signal.c:29
pos = 0x555bfbc7f148 <server+488>
l = 0x555bfbc7f148 <server+488>
cursor =
{link = {prev = 0x555bfbc7f148 <server+488>, next = 0x7fff238a8390}, notify = 0x7f7dab4fbef0 <handle_noop>}
end =
{link = {prev = 0x7fff238a8370, next = 0x555bfd7419f8}, notify = 0x7f7dab4fbef0 <handle_noop>}
#12 0x00007f7daa45469a in ffi_call_unix64 () at /usr/lib/libffi.so.6
#13 0x00007f7daa453fb6 in ffi_call () at /usr/lib/libffi.so.6
#14 0x00007f7daae6f82f in () at /usr/lib/libwayland-server.so.0
#15 0x00007f7daae6c193 in () at /usr/lib/libwayland-server.so.0
#16 0x00007f7daae6d7f2 in wl_event_loop_dispatch () at /usr/lib/libwayland-server.so.0
#17 0x00007f7daae6c39c in wl_display_run () at /usr/lib/libwayland-server.so.0
This crash happens because focus can only be set on mapped surfaces.