#45938: City-buy allows buying off all shields of an unavailable production target
Open Date: 2022-10-21 03:17
Last Update: 2022-10-21 03:17
URL for this Ticket:
https://osdn.net//projects/freeciv/ticket/45938
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Last Changes/Comment on this Ticket:
2022-10-21 03:17 Updated by: Anonymous
* New Ticket "City-buy allows buying off all shields of an unavailable production target" created
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Ticket Status:
Reporter: (Anonymous)
Owner: (None)
Type: Bugs
Status: Open
Priority: 5 - Medium
MileStone: (None)
Component: (None)
Severity: 5 - Medium
Resolution: None
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Ticket details:
Unavailable production targets DO happen (probably shouldn't), but that's a separate issue.
This bug happens when there is an unavailable target in current city production. It is still possible to buy the target. This facilitated exploits like (rather) tricky worklist manipulations to arrive at illegal targets so that one can buy them at lower shield-gold cost, then switch the target on the next turn from some unit costing 10 or 20 to one cost 30 or 40.
Adding a check for unavailability in really_handle_city_buy() fixed it for us at FCW:
/* City with an illegal target! Don't allow illegal-buy exploits: */ if (!can_city_build_direct(pcity, &pcity->production)) { char prod[256]; universal_name_translation(&pcity->production, prod, sizeof(prod)); notify_player(pplayer, pcity->tile, E_BAD_COMMAND, ftc_server, _("[`no`] %s lacks requirements to buy or build %s."), city_link(pcity), prod); return; }
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