wlr_output_layout_get() returns NULL for disabled outputs.
Backtrace (abbreviated):
#0 lab_wlr_output_layout_layout_coords at ../src/ssd/ssd_extents.c:33
#1 ssd_extents_update at ../src/ssd/ssd_extents.c:133
#2 ssd_extents_create at ../src/ssd/ssd_extents.c:95
#3 ssd_create at ../src/ssd/ssd.c:161
#4 decorate.part.0.lto_priv.0 at ../src/view.c:637
#5 decorate at ../src/view.c:636
#6 view_set_fullscreen at ../src/view.c:716
#7 view_adjust_for_layout_change ../src/view.c:745
#8 desktop_arrange_all_views ../src/desktop.c:52
#9 output_update_all_usable_areas at ../src/output.c:495
#10 output_update_for_layout_change at ../src/output.c:263
#11 do_output_layout_change at ../src/output.c:423
#12 do_output_layout_change at ../src/cursor.c:267
#13 output_config_apply at ../src/output.c:334
#14 handle_output_manager_apply at ../src/output.c:354