#3850: EmptyDataDecls and type context
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Reporter: Paczesiowa | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 6.12.1
Keywords: emptydatadecls | Difficulty:
Os: Unknown/Multiple | Testcase:
Architecture: Unknown/Multiple | Failure: GHC rejects valid program
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Comment(by Paczesiowa):
I don't have anything to do with this, maybe you should ask Oleg about
such definition for labels.
I just wanted to fix HList (it fails to compile with 6.12) and I've
discovered, that 6.12 works different than 6.10 and also reports really
misleading error message. So, I'm not interested in making this usage work
like in 6.10, but there should be a better error message and some info in
docs, that the behavior changed.
Oleg's code: http://old-darcs.well-typed.com/HList/Data/HList/Label2.hs
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Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3850#comment:2>
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