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Summary
SUMMARY: Bugfixes "Fixed mutable copy-from"
Purpose of change
Should fix #3665
On my system it cause segfaults, but it comes from same mod and same special. Must be a build difference.
And it kinda makes sense that it starts ranting about unresolvable joins, if
outward_joins
got duplicated during second finalize.Describe the solution
Added some checks to clean old data on finalize, which is happens twice when special is copy-from'ed. And some more small adjustments to make it more copy-from proof.
Also, by the way, removed obsolete anthill check in mapgen.cpp. It's currently handled by json.
Describe alternatives you've considered
Rewriting copy-froms -_-
Testing
Start game with PKs_Rebalancing(it does copy-from Anthill) mod, spawn regular anthill. Before fix it used to segfault me, not anymore.
Additional context