Bug#473678: boswars: game "looping" endlessly...

[Kalle Olavi Niemitalo]

Another related upstream bug has been fixed in SVN trunk:
  http://savannah.nongnu.org/bugs/?29766
  "Path finding method eats CPU futilely when there is not possible path"

If I understand correctly, the pathfinder itself was not changed
there, but the higher-level code was changed to retry fewer times
if it doesn't find a path right away.  This change is not in the
boswars-2.6 branch.  It is likely to be released in Bos Wars 2.7.

I had some plans for caching the results from the pathfinder:
  http://savannah.nongnu.org/patch/?7141
  "Speed up pathfinder by caching islands"
but it now seems such a cache would require also hooking all the
code that moves units, so I'd rather do that only if the current
fix doesn't suffice. 
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