bounce_unit() bounces units within non-safe iterate
bounce_unit() iterates unit cargo with unit_list_iterate(), and moves them out from the list within. That should be unit_list_iterate_safe()
Patches for all branches, including S2_6, attached.
bounce_unit() iterates unit cargo with unit_list_iterate(), and moves them out from the list within. That should be unit_list_iterate_safe()