> Hey all,
> New to Haskell and I'm trying to use the FGL but I keep running into the
> same error.
> If I load Data.Graph.Inductive.Example and use one of the example
> functions such as ucycle I get:
> Ambiguous type variable `gr' in the constraint:
> `Graph gr' arising from a use of `ucycle' at <interactive>:1:0-7
> Probable fix: add a type signature that fixes these type variable(s)
> Here's the type of ucycle for reference.
> ucycle :: Graph gr => Int -> gr () ()
> I'm using GHC 6.10.1 and FGL 126.96.36.199