[GHC] #7259: Eta expansion of products in System FC

[GHC]

#7259: Eta expansion of products in System FC
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        Reporter:  simonpj           |                Owner:  simonpj
            Type:  bug               |               Status:  new
        Priority:  normal            |            Milestone:
       Component:  Compiler          |              Version:  7.6.1
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by kcsongor):

 Replying to [comment:24 simonpj]:
 > > This is currently imperilled by #14420.
 >
 > How, exactly?

 #14420 means that one can define a distinguishable member of any kind,
 bringing back `Any`

 {{{
 data family Any :: k
 }}}

 Isn't this what caused the original soundness issue?

-- 
Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/7259#comment:25>
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