Network game crashes and "Engines out of sync" error message appears.

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What steps will reproduce the problem?
1. Play a network game (possibly with 2--5 people using other systems)
2. Play quite a long while (almost a whole standard game)
3. You are kicked out of the game.

What is the expected output? What do you see instead?
You should be able to play the match till the end. Instead, you are kicked out 
with a "Engines out of sync" error message (or a similar message). The other 
players keep playing regularly (and tease you from the chat). There's no way to 
join in again as a spectator: the game will quickly reproduce the past events 
in the game, from the beginning, and then immediately kick you out again with 
the same error message.

What version of the product are you using? On what operating system?
0.9.20-5 on Mac OS X 10.10 (but it happened on 10.9 as well).

Please provide any additional information below.

Original issue reported on code.google.com by enrico.g...@gmail.com on 20 Aug 2014 at 8:56

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This sort of thing is unfortunately almost impossible to debug without demos 
(and ideally logs too) from you and one of the other players.
Next time it happens, please try to grab these.

Original comment by kyberneticist@gmail.com on 20 Aug 2014 at 9:27

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Original comment by sheepyluva on 11 Dec 2014 at 6:41

• Changed state: ClosingIfNoActivity