Invalid placemnent after dragon move (placement of a tile; game with AI) (race condition bug)

[JustAPhrog]

In several games with AI game crashed after last move of a dragon. Next player (AI) is about to place a tile, but then error occur:

 java.lang.illegalArgumentException: Invalid placement [4,5], R90

v4.3.0 (2018-01-11) I played 3 AI players and with expansions (loaded from configuration):

• Winter edition
• Traders and builders
• The Princess and The Dragon
• Inns and Cathedrals
• Abbey and Mayor
• River I & II
• Heretics

Edit: Players are in random order.

I had empty user name. Lang: PL report.zip error.log ErrorAfterDragonSave.zip

[JustAPhrog]

After exit and load save resolve problem - next AI player made next move.

[farin]

it's probably caused rather by some timing issue / race condition (bacause save&load helped)

[farin]

similar to #272