#1730: type families GHC "impossible happened"
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Reporter: guest | Owner:
Type: bug | Status: new
Priority: normal | Milestone:
Component: Compiler | Version: 6.8
Severity: normal | Resolution:
Keywords: type families panic | Difficulty: Unknown
Os: Unknown | Testcase:
Architecture: Unknown |
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Old description:
> the code: http://hpaste.org/2860?#a0
>
> produces the following error:
>
> $ ghci Foldable.hs
> GHCi, version 6.8.0.20070921: http://www.haskell.org/ghc/ :? for help
> Loading package base ... linking ... done.
> [1 of 1] Compiling Data.Collections.Foldable ( Foldable.hs, interpreted )
> ghc-6.8.0.20070921: panic! (the 'impossible' happened)
> (GHC version 6.8.0.20070921 for i386-unknown-linux):
> check_tau_type
> main:Data.Collections.Foldable.FoldElem{tc rE4} t{tv aFj} [tv]
>
> Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
New description:
the code: http://hpaste.org/2860?#a0
produces the following error:
{{{
$ ghci Foldable.hs
GHCi, version 6.8.0.20070921: http://www.haskell.org/ghc/ :? for help
Loading package base ... linking ... done.
[1 of 1] Compiling Data.Collections.Foldable ( Foldable.hs, interpreted )
ghc-6.8.0.20070921: panic! (the 'impossible' happened)
(GHC version 6.8.0.20070921 for i386-unknown-linux):
check_tau_type
main:Data.Collections.Foldable.FoldElem{tc rE4} t{tv aFj} [tv]
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1730>
GHC <http://www.haskell.org/ghc/>
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