#3690: GHC panics on a crazy type signature
-------------------------------+--------------------------------------------
Reporter: Alien | Owner:
Type: bug | Status: new
Priority: normal | Component: Compiler (Type checker)
Version: 6.10.4 | Keywords:
Os: Windows | Testcase:
Architecture: x86_64 (amd64) | Failure: Compile-time crash
-------------------------------+--------------------------------------------
{{{
x :: [Enum a => (forall a. Num a => a)]
x = []
}}}
I have NO idea what that would mean or whatever it makes sense at all, but
it fails with:
{{{
: panic! (the 'impossible' happened)
(GHC version 6.10.4 for i386-unknown-mingw32):
TcTyFuns.flattenType: unexpected PredType
}}}
And it said I should report it. :)
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/3690>
GHC <http://www.haskell.org/ghc/>
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