Game crashed while surveying.

[Jacobian123]

Title says all. I selected a 30x36 area for a survey marker and the game crashed on me.

I did get a crash report, however:

java.util.ConcurrentModificationException
at java.util.HashMap$HashIterator.nextEntry(Unknown Source)
at java.util.HashMap$KeyIterator.next(Unknown Source)
at haven.MCache.getol(MCache.java:425)
at haven.MapMesh.makeols(MapMesh.java:485)
at haven.MCache$Grid.getolcut(MCache.java:213)
at haven.MCache.getolcut(MCache.java:441)
at haven.MapView$2.setup(MapView.java:464)
at haven.RenderList.setup(RenderList.java:100)
at haven.RenderList.add(RenderList.java:137)
at haven.MapView.setup(MapView.java:574)
at haven.PView$1.setup(PView.java:198)
at haven.RenderList.setup(RenderList.java:100)
at haven.RenderList.setup(RenderList.java:125)
at haven.PView.draw(PView.java:222)
at haven.MapView.draw(MapView.java:906)
at haven.Widget.draw(Widget.java:614)
at haven.Widget.draw(Widget.java:619)
at haven.GameUI.draw(GameUI.java:583)
at haven.Widget.draw(Widget.java:614)
at haven.Widget.draw(Widget.java:619)
at haven.RootWidget.draw(RootWidget.java:65)
at haven.UI.draw(UI.java:140)
at haven.HavenPanel.rootdraw(HavenPanel.java:289)
at haven.HavenPanel.run(HavenPanel.java:521)
at java.lang.Thread.run(Unknown Source)

Anyone have any idea?