Swing threads

snippet.clj

(defn make-human-move
  "Block until human has moved, then return move."
  [g]
  (SwingUtilities/invokeLater #(update-ui-game-state g human-player-id))
  (reset! human-turn? true)
  ;; Block until human has moved
  (.take human-moves))

stack trace.txt

timmc@thunk:~/repos/crosscram$ lein run -m crosscram.demo
(#<Thread Thread[Game loop,5,main]>)
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
	at java.awt.geom.Path2D$Float.<init>(Path2D.java:232)
	at java.awt.geom.Path2D$Float.<init>(Path2D.java:207)
	at sun.java2d.pipe.LoopPipe.fill(LoopPipe.java:300)
	at sun.java2d.pipe.PixelToParallelogramConverter.fill(PixelToParallelogramConverter.java:164)
	at sun.java2d.pipe.ValidatePipe.fill(ValidatePipe.java:160)
	at sun.java2d.SunGraphics2D.fill(SunGraphics2D.java:2422)
	at crosscram.demo$render_game.invoke(demo.clj:189)
	at crosscram.demo$update_ui_game_state.invoke(demo.clj:212)
	at crosscram.demo$make_human_move$fn__177.invoke(demo.clj:130)
	at clojure.lang.AFn.run(AFn.java:24)
	at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:226)
	at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:670)
	at java.awt.EventQueue.access$400(EventQueue.java:96)
	at java.awt.EventQueue$2.run(EventQueue.java:631)
	at java.awt.EventQueue$2.run(EventQueue.java:629)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.security.AccessControlContext$1.doIntersectionPrivilege(AccessControlContext.java:105)
	at java.awt.EventQueue.dispatchEvent(EventQueue.java:640)
	at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:275)
	at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:200)
	at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:190)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:185)
	at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:177)
	at java.awt.EventDispatchThread.run(EventDispatchThread.java:138)