New comparison primops are now in HEAD. This change breaks backwards 
compatibility for comparison primops. What you need to do after pulling the 
latest HEAD is:

1) Upgrade to latest versions of Alex and Happy (cabal update && cabal install 
alex happy).

2) Rebase your branches on top of HEAD, if these branches were in a repository 
affected by primop change. Repositories that will were affected: GHC, 
testsuite, array, base, dph, ghc-prim, integer-gmp, integer-simple, primitive, 
template-haskell.

3) Blow away your build. Be sure to run ./configure to pick up new versions of 
Alex and Happy

Janek
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