[Freeciv-Dev] Re: (PR#7408) unit_list_size(&ptile->units) == 0 Again (Sea barbarians)

["Jason Short" <jdorje@xxxxxxxxxxxxxxxxxxxxx>]

<URL: http://rt.freeciv.org/Ticket/Display.html?id=7408 >

mateusz stefek wrote:

> There's another problem: Suppose that Player B has a loaded transport within 
> sight of player A. They have shared vision.
> Then player B removes shared vision and moves his transport. Server doesn't 
> remove units inside transport from A's client.

Argh!  And I guess for units in cities, too?

Solutions:

- Server detects when alliances change and goes over every unit to see 
if it must be removed.

- Server tracks a player_knows_about_unit(pplayer, punit) value.  If we 
send_unit_info for a unit that the player knows about but can't see, 
send a destroy unit packet instead.

jason