Fri Dec 19 11:23:09 PST 2008 Duncan Coutts <duncan@haskell.org> * Extend the invariant on the Constraints ADT It now carries around the original version of the database purely so that it can do a much more extensive consistency check. Packages are never gained or lost, just transfered between pots in various slightly tricky ways. M ./Distribution/Client/Dependency/TopDown/Constraints.hs -19 +61 View patch online: http://darcs.haskell.org/cabal-install/_darcs/patches/20081219192309-adfee-a...