[GHC] #10115: Unable to run cabal haddock --hoogle on GHC 7.10

[GHC]

#10115: Unable to run cabal haddock --hoogle on GHC 7.10
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              Reporter:  snoyberg    |             Owner:
                  Type:  bug         |            Status:  new
              Priority:  highest     |         Milestone:
             Component:  Compiler    |           Version:  7.10.1-rc2
              Keywords:              |  Operating System:  Linux
          Architecture:  x86_64      |   Type of failure:  Runtime crash
  (amd64)                            |        Blocked By:
             Test Case:              |   Related Tickets:
              Blocking:              |
Differential Revisions:              |
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 At Herbert's recommendation, creating an issue based on the following
 email I sent to ghc-dev:

 I'm not really able to follow the details of this, but I wanted to raise
 to everyone's attention a serious bug with the current GHC 7.10 RC, Cabal
 1.22, and/or Haddock. Currently, running `cabal haddock --hoogle` does not
 work. There seem to be two different issues open about it:

 https://github.com/haskell/haddock/issues/361
 https://github.com/haskell/cabal/issues/2297

 I really don't understand the issues here, but I'd claim that the severity
 of this should probably be a blocker for a GHC 7.10 release.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/10115>
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