There is no primary method for the generic function
  #<STANDARD-GENERIC-FUNCTION ORG.SHIRAKUMO.ALLOY:HANDLE (87)>
when called with arguments
  (#<WINDOWING:STATE {10018E4323}>
   #<SCREEN 1x1 HIDDEN @7A9880033C30>).
   [Condition of type SB-PCL::NO-PRIMARY-METHOD-ERROR]

Restarts:
 0: [RETRY] Retry calling the generic function.
 1: [ABORT] Abort the callback.
 2: [RETRY] Retry SLY interactive evaluation request.
 3: [*ABORT] Return to SLY's top level.
 4: [ABORT] abort thread (#<THREAD tid=7550 "slynk-worker" RUNNING {100183EFB3}>)

Backtrace:
 0: ((:METHOD SB-PCL:NO-PRIMARY-METHOD (T)) #<STANDARD-GENERIC-FUNCTION ORG.SHIRAKUMO.ALLOY:HANDLE (87)> #<WINDOWING:STATE {10018E4323}> #<SCREEN 1x1 HIDDEN @7A9880033C30>) [fast-method]
 1: (SB-PCL::CALL-NO-PRIMARY-METHOD #<STANDARD-GENERIC-FUNCTION ORG.SHIRAKUMO.ALLOY:HANDLE (87)> (#<WINDOWING:STATE {10018E4323}> #<SCREEN 1x1 HIDDEN @7A9880033C30>))
 2: ((LAMBDA (ORG.SHIRAKUMO.FRAF.GLFW.CFFI::WINDOW ORG.SHIRAKUMO.FRAF.GLFW.CFFI::MAXIMIZED) :IN "/home/paul/.local/share/common-lisp/source/glfw/low-level.lisp") #.(SB-SYS:INT-SAP #X7A9880750E20) 1)
 3: ((LAMBDA (SB-ALIEN::ARGS-POINTER SB-ALIEN::RESULT-POINTER FUNCTION) :IN "/home/paul/.local/share/common-lisp/source/glfw/low-level.lisp") #<unavailable argument> #<unavailable argument> #<unavailable ..
 4: ("foreign function: funcall_alien_callback")
 5: ("foreign function: #x500010E7")
 6: ("foreign function: ffi_type_uint32")
 7: ("foreign function: #x7A988CBA3E7B")
 8: ("foreign function: #x7A988D709052")
 9: (ORG.SHIRAKUMO.FRAF.GLFW:POLL-EVENTS :TIMEOUT 0.03333333333333333d0)
10: (GLFW::CALL-WITH-SCREEN #<FUNCTION (FLET "INIT5" :IN MENU-BAR) {552070AB}> SCREEN :BASE-SCALE 2.0)
11: (SB-INT:SIMPLE-EVAL-IN-LEXENV (MENU-BAR) #<NULL-LEXENV>)
12: (EVAL (MENU-BAR))
13: ((LAMBDA NIL :IN SLYNK:INTERACTIVE-EVAL))
 --more--