Default client - error

[noindyfikator]

Windows 10, Java 11, 64 bit

Game has crashed

java.util.ConcurrentModificationException
at java.base/java.util.HashMap$HashIterator.nextNode(HashMap.java:1493)
at java.base/java.util.HashMap$ValueIterator.next(HashMap.java:1521)
at haven.Gob.added(Gob.java:363)
at haven.render.RenderTree$TreeSlot.add(RenderTree.java:462)
at haven.render.RenderTree$TreeSlot.add(RenderTree.java:366)
at haven.render.RenderTree$Slot.add(RenderTree.java:343)
at haven.Gob$Placed.added(Gob.java:566)
at haven.render.RenderTree$TreeSlot.add(RenderTree.java:462)
at haven.render.RenderTree$TreeSlot.add(RenderTree.java:366)
at haven.render.RenderTree$Slot.add(RenderTree.java:343)
at haven.MapView$Gobs.addgob(MapView.java:560)
at haven.MapView$Gobs.lambda$added$1(MapView.java:606)
at haven.Loader.lambda$defer$0(Loader.java:235)
at haven.Loader$Future.run(Loader.java:71)
at haven.Loader$Future.access$400(Loader.java:42)
at haven.Loader.loop(Loader.java:197)
at java.base/java.lang.Thread.run(Thread.java:834)

[vatas]

This is likely just a scenario where I discovered a hammer and assume all the past problems must have been nails, but did your computer use system locale (language) other than English?

[Mashadar]

To give some context, this crash happens when chopping a tree (I think being near a growing tree also triggers it very rarely) while the client window is inactive.
When you have multiple clients open and have all the characters chop trees in the same area, then this crash happens basically every minute.