alain_bkr If S2_6 is affected, there's no "world_object" in it. Would be nice to have this in 2.6.9 (in case you're not following freeciv-dev: we are about to release that in two weeks)
alain_bkr here is the patch for 2.6
(btw i subscribed to dev mailing list and read archive)
I think this was your first contribution with the commit having you as the author (as git knows it).
Once OpenHUB process freeciv data next time (frequency of that has fluctuated a lot during the years - sometimes it happens almost daily, but couple of months is normal too), it should show you as a new contributor, and if you wish, you can claim those contributions to your personal account.
S3_1
with landmass85 , on a tiny map i had this error
There i no lake on the map, and the error is about regenerate_lakes :-)
This did not prevented the map generation but it is better to fix it, see attached (trivial) patch for S3_1 , and also main i did not checked other branches, but i guess it will apply flawlessly.