[Freeciv-Dev] (PR#4461) server crash upon discovery of fut. tech. I

["Guest" <rt-guest@xxxxxxxxxxxxxx>]

CVS version of June 27

> civserver: plrhand.c:222: found_new_tech: Assertion
`tech_is_available(plr, tech_found)' failed.

Turn N: found Future Tech. I in ancient scrolls of wisdom
Turn N+1: research of Future Tech. I is finished -> crash
Actually, that last statement is a guess. I was researching FT1 when I
found it in a hut. The next turn, the server crashed. Sorry, no saved
games and hence no backtrace either.