[GHC] #8803: ghc panic ((!!): index too large) when building some packages

[GHC]

#8803: ghc panic ((!!): index too large) when building some packages
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       Reporter:  joelteon        |             Owner:
           Type:  bug             |            Status:  new
       Priority:  normal          |         Milestone:
      Component:  Compiler        |           Version:  7.8.1-rc1
       Keywords:                  |  Operating System:  MacOS X
   Architecture:  x86_64 (amd64)  |   Type of failure:  Compile-time crash
     Difficulty:  Unknown         |         Test Case:
     Blocked By:                  |          Blocking:
Related Tickets:                  |
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 I'm not 100% sure what the cause of this is, because I can't get a
 reproducible test case.

 If I try to build `postgresql-simple`, this is the output from cabal (with
 `-v3`): https://gist.github.com/anonymous/bda9095cee1eda5640c0

 Wondered whether it was related to hs-boot files, but I cannot reproduce
 the error with the basic example from
 http://www.haskell.org/ghc/docs/7.0.3/html/users_guide/separate-
 compilation.html.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/8803>
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