Famine heap-use-after-free
Reported (and patch provided) by michaelortmann in https://github.com/freeciv/freeciv/pull/43
Even if city gets destroyed by famine, its pointer gets used in city_populate()
Reported (and patch provided) by michaelortmann in https://github.com/freeciv/freeciv/pull/43
Even if city gets destroyed by famine, its pointer gets used in city_populate()