#1659: Cabal build problem with GHC <= 6.4
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Reporter: simonmar | Owner:
Type: bug | Status: new
Priority: high | Milestone: 6.8
Component: libraries (other) | Version: 6.6.1
Severity: normal | Keywords:
Difficulty: Unknown | Os: Unknown
Testcase: | Architecture: Unknown
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{{{
ghc-6.2.2 -H16m -O -I. -Iinclude -Rghc-timing -H32m -O -I../libraries
-fglasgow-exts -no-recomp -c Distribution/Compat/Map.hs -o
Distribution/Compat/Map.o -ohi Distribution/Compat/Map.hi
../libraries/Cabal/Distribution/Compat/Map.hs:68:
Inferred type is less polymorphic than expected
Quantified type variable `b' is unified with another quantified
type variable `k'
When trying to generalise the type inferred for `difference'
Signature type: forall k a b.
(Ord k) =>
Map k a -> Map k b -> Map k a
Type to generalise: Map k a -> Map k k -> Map k a
When checking the type signature for `difference'
When generalising the type(s) for `difference'
}}}
--
Ticket URL: <http://hackage.haskell.org/trac/ghc/ticket/1659>
GHC <http://www.haskell.org/ghc/>
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