#4530: Deriving Data for existentially quantified types
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Reporter: mitar | Owner:
Type: bug | Status: closed
Priority: normal | Milestone: 7.2.1
Component: Compiler | Version: 7.1
Resolution: invalid | Keywords:
Testcase: | Blockedby:
Difficulty: | Os: Unknown/Multiple
Blocking: | Architecture: Unknown/Multiple
Failure: None/Unknown |
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Comment(by mitar):
Replying to [comment:2 simonpj]:
> What do you expect to happen? Can you write a `Data` instance by hand?
I do not know. I hopped that somebody else will know that. ;-)
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/4530#comment:3>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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