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Simon Peyton Jones authored
MERGE to 6.8 branch In computeChangedOccs we look up the old version of a Name. But a WiredIn Name doesn't have an old version, because WiredIn things don't appear in interface files at all. Result: ghc-6.9: panic! (the 'impossible' happened) (GHC version 6.9 for x86_64-unknown-linux): lookupVers1 base:GHC.Prim chr#{v} This fixes the problem. The patch should merge easily onto the branch.
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