GADT syntax for newtype causes tcConDecl exception
$ cat Bug.hs
{-# OPTIONS -fglasgow-exts #-}
module Bug where
newtype Bug a where Bug :: a -> Bug a
$ ghc -c Bug.hs
ghc-6.6: panic! (the 'impossible' happened)
(GHC version 6.6 for i386-unknown-linux):
typecheck/TcTyClsDecls.lhs:(468,0)-(524,4): Non-exhaustive patterns in function tcConDecl
Please report this as a GHC bug: http://www.haskell.org/ghc/reportabug
Trac metadata
| Trac field | Value |
|---|---|
| Version | 6.6 |
| Type | Bug |
| TypeOfFailure | OtherFailure |
| Priority | normal |
| Resolution | Unresolved |
| Component | Compiler |
| Test case | |
| Differential revisions | |
| BlockedBy | |
| Related | |
| Blocking | |
| CC | |
| Operating system | |
| Architecture | Unknown |
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