Cabal build problem with GHC <= 6.4
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'
Trac metadata
Trac field |
Value |
Version |
6.6.1 |
Type |
Bug |
TypeOfFailure |
OtherFailure |
Priority |
high |
Resolution |
Unresolved |
Component |
libraries (other) |
Test case |
|
Differential revisions |
|
BlockedBy |
|
Related |
|
Blocking |
|
CC |
|
Operating system |
Unknown |
Architecture |
Unknown |