patch applied (cabal-install): "Fix a case in the new solver pruning pass" and 1 others

[Duncan Coutts]

Mon Apr 18 14:12:11 PDT 2011  Duncan Coutts <duncan at haskell.org>
  * Fix a case in the new solver pruning pass
  It is actually possible for pruning to eliminate required packages
  because it's possible for it to propagate all the way up to one of
  the initial targets.

    M ./Distribution/Client/Dependency/TopDown.hs -2 +1

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=cabal-install;a=darcs_commitdiff;h=20110418211211-adfee-442f4a08d3ab24a959545bb666edee8120d47576.gz

Mon Apr 18 14:14:36 PDT 2011  Duncan Coutts <duncan at haskell.org>
  * Distinguish the various impossible errors in the solver
  Will make tracking down problems easier in future.

    M ./Distribution/Client/Dependency/TopDown.hs -10 +12

View patch online:
http://darcs.haskell.org/cgi-bin/darcsweb.cgi?r=cabal-install;a=darcs_commitdiff;h=20110418211436-adfee-dc463482f296c9ee0d9a7663df97f60ca17a37aa.gz