patch applied (cabal-install): Fix constraint set handling for installed constraints

Fri Dec 19 10:23:28 PST 2008 Duncan Coutts <duncan@haskell.org> * Fix constraint set handling for installed constraints A rather subtle bug. The code was actually correct but the transitionsTo assertion was not accounting for a transition between the case where a package's available version had been excluded and then the whole thing got excluded by a version constraint. It counted one side as a loss without a corresponding gain on the other side. M ./Distribution/Client/Dependency/TopDown/Constraints.hs -2 +5 View patch online: http://darcs.haskell.org/cabal-install/_darcs/patches/20081219182328-adfee-c...