#7777: ghc panic: varargs + sets
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Reporter: litherum
| Owner:
Type: bug
| Status: closed
Priority: normal
| Component: Compiler
Version: 7.4.1
| Resolution: duplicate
Keywords: MultiParamTypeClasses FunctionalDependencies FlexibleInstances
UndecidableInstances | Os: Linux
Architecture: Unknown/Multiple
| Failure: Compile-time crash
Blockedby:
| Blocking:
Related:
|
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Changes (by monoidal):
* status: new => closed
* resolution: => duplicate
Comment:
The panic is caused by:
{{{
instance Ord a => BuildSet a b => BuildSet a (a -> b)
}}}
which should be `(Ord a, BuildSet a b) => BuildSet a (a -> b)`. The error
message is already fixed in GHC 7.6, see bug #5951.
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/7777#comment:2>
GHC <http://www.haskell.org/ghc/>
The Glasgow Haskell Compiler
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