[GHC] #9170: haddock: panic! (the 'impossible' happened)

[GHC]

#9170: haddock: panic! (the 'impossible' happened)
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        Reporter:  diego.saa           |            Owner:
            Type:  bug                 |           Status:  closed
        Priority:  normal              |        Milestone:
       Component:  Compiler            |          Version:  7.6.3
      Resolution:  worksforme          |         Keywords:
Operating System:  MacOS X             |     Architecture:
 Type of failure:  Compile-time crash  |  Unknown/Multiple
       Test Case:                      |       Difficulty:  Unknown
        Blocking:                      |       Blocked By:
                                       |  Related Tickets:
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Comment (by Fuuzetsu):

 Actually I was made aware of this few weeks ago (precisely with 7.6.3 and
 precisely for Yi). I have in fact a check-out here of Yi that fails to
 Haddock with 7.6.3 but I just built the docs fine with 7.8.2 with the
 respective Haddock versions that come with each so yes, it does seem to
 have gone away.

 Note that I don't recall fixing anything like this specifically so it
 seems like it was a GHC change.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9170#comment:2>
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