The game crashed when saving on the way to a mission
ufoconsole.log has very little details about this:
>>>
ExecuteString: 'mn_push save'
ExecuteString: 'game_comments'
FindFile: ./base/pics/menu/save_slota.tga
FindFile: ./base/pics/menu/save_slota.tga
ExecuteString: '-select 178 31562508'
ExecuteString: '+select 178 31564602'
ExecuteString: 'msgmenu ?mn_slot6'
ExecuteString: 'messagemenu'
ExecuteString: '-select 178 31564757'
ExecuteString: 'msgmenu ":N2-M1-Rev"'
ExecuteString: 'mn_slot6_changed'
ExecuteString: 'game_save slot6 *mn_slot6'
<<<
BTW, most of these "FindFile:" - messages for .tga and .pcx - files
appear twice in a row - is this really necessary ?