Attempt to use closed display #<XLIB:DISPLAY :0 (The X.Org Foundation R10601901)>
0: (SB-DEBUG::MAP-BACKTRACE #<CLOSURE (LAMBDA #) {10041DADF9}>)[:EXTERNAL]
1: (SB-DEBUG:BACKTRACE 100 #<SB-IMPL::STRING-OUTPUT-STREAM {10041DAD51}>)
2: (STUMPWM::BACKTRACE-STRING)
3: (STUMPWM::PERFORM-TOP-LEVEL-ERROR-ACTION #<XLIB:CLOSED-DISPLAY {10041DA381}>)
4: (SIGNAL #<XLIB:CLOSED-DISPLAY {10041DA381}>)[:EXTERNAL]
5: (ERROR XLIB:CLOSED-DISPLAY)[:EXTERNAL]
6: (XLIB::X-ERROR XLIB:CLOSED-DISPLAY)[:EXTERNAL]
7: (XLIB:DISPLAY-FINISH-OUTPUT
    #<XLIB:DISPLAY :0 (The X.Org Foundation R10601901)>)
8: (STUMPWM::HANDLE-EVENT)[:EXTERNAL]
9: ((FLET SB-THREAD::WITH-RECURSIVE-LOCK-THUNK))
10: ((FLET #:WITHOUT-INTERRUPTS-BODY-[CALL-WITH-RECURSIVE-LOCK]477))
11: (SB-THREAD::CALL-WITH-RECURSIVE-LOCK
     #<CLOSURE (FLET SB-THREAD::WITH-RECURSIVE-LOCK-THUNK) {7FA4A3707AB9}>
     #S(SB-THREAD:MUTEX
        :NAME "CLX Event Lock"
        :%OWNER #<SB-THREAD:THREAD "initial thread" RUNNING {10039169D1}>
        :STATE 1))
12: (XLIB:PROCESS-EVENT #<XLIB:DISPLAY :0 (The X.Org Foundation R10601901)>)[:EXTERNAL]
13: (STUMPWM::STUMPWM-INTERNAL-LOOP)
14: (STUMPWM::STUMPWM-INTERNAL ":0.0")
15: (STUMPWM ":0.0")
16: ((LAMBDA ()))
17: ((LABELS SB-IMPL::RESTART-LISP))