<URL: http://bugs.freeciv.org/Ticket/Display.html?id=39778 >
I've gone through the old reports, and here's my current understanding.
I'm reporting, don't shoot the messenger.
PR#1323 Teams are/were Per's baby.
PR#4213 Shared team research was a long-term design goal. Many design
approaches were tried.
PR#11875 In 2.1, player cannot leave team. The code for splitting
research data was removed. The code for re-joining teams was also
removed (it was incomplete and only in 1 client).
PR#13145 In 2.1, all teams are allocated at initialization time and all
names are pre-set. Teams have numbers instead of names.
PR#13252 Contains a lot of discussion and dependencies.
PR#13429 In 2.1, team research data structures are shared. (Contrast with
PR#12508.) Teams in 1.14's savegames are ignored.
I did not find explicit comments saying 2.0 teams would be ignored,
Since the data structures are different, it isn't easy to combine the old
Conclusion: for 2.1, all earlier version teams are ignored. This was a
deliberate design decision. New teams can only be setup in pre-game.
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