NULL dereference in handle_unit_actions()
Split from #42647 (to keep that ticket open), bug reported anonymously in the comments: when handle_unit_actions() receives REQEST_BACKGROUND_REFRESH for a dead actor unit, that NULL actor_unit is used in actor_unit->id.
Plan to push also to S2_6
Split from #42647 (to keep that ticket open), bug reported anonymously in the comments: when handle_unit_actions() receives REQEST_BACKGROUND_REFRESH for a dead actor unit, that NULL actor_unit is used in actor_unit->id.