[GHC] #13352: Strange requirement for re-exported duplicate record fields

[GHC]

#13352: Strange requirement for re-exported duplicate record fields
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        Reporter:  crockeea          |                Owner:  (none)
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  8.0.2
      Resolution:                    |             Keywords:  orf
Operating System:  Unknown/Multiple  |         Architecture:
 Type of failure:  GHC rejects       |  Unknown/Multiple
  valid program                      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by tejon):

 I've just run into this as well, with the additional observation that if
 module C ''re-exports'' modules A and B, then C must also have
 `DuplicateRecordFields`. (Of course, C needing it is the immediate
 intuition anyway; but it's not always true that it's only needed at (n-1
 of) the definition points.

 This is just a slightly annoying curiosity when one controls all the
 relevant modules, but it seems like it shuts down the extension completely
 if one is working with external modules that don't have
 `DuplicateRecordFields` enabled (because why should they, internally there
 are none).

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/13352#comment:4>
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