[GHC] #9009: Confusing error message when loading package with TH

[GHC]

#9009: Confusing error message when loading package with TH
-------------------------------------+-------------------------------------
              Reporter:  jstolarek   |            Owner:
                  Type:  bug         |           Status:  infoneeded
              Priority:  normal      |        Milestone:
             Component:  Package     |          Version:  7.8.2
  system                             |         Keywords:
            Resolution:              |     Architecture:  Unknown/Multiple
      Operating System:              |       Difficulty:  Unknown
  Unknown/Multiple                   |       Blocked By:
       Type of failure:  Other       |  Related Tickets:
             Test Case:              |
              Blocking:              |
Differential Revisions:              |
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Comment (by jstolarek):

 > Compiling singletons-1.0 with HEAD failes with ...
 Just remove the `MINIMAL` pragma.

 > Maybe cabal version (1.20.0.3) is relevant?

 It looks like my version is identical:

 {{{
 $ cabal --version
 cabal-install version 1.20.0.3
 using version 1.20.0.2 of the Cabal library
 }}}

 I see you're using cabal sandbox. Perhaps this is important? I'm using
 user's package database.

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/9009#comment:4>
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