haskell - leksah install fails due to regex-tdfa-text-1.0.0.2 -


on ubuntu 12.04, ghc 7.10.3, cabal 1.22.3, 4 gigs of ram, error when installing leksah, following these instructions.

any idea how solve ? causing this? 

joco@vm001:~$ cabal install leksah resolving dependencies... configuring regex-tdfa-text-1.0.0.2... building regex-tdfa-text-1.0.0.2... failed install regex-tdfa-text-1.0.0.2 build log ( /home/joco/.cabal/logs/regex-tdfa-text-1.0.0.2.log ): configuring regex-tdfa-text-1.0.0.2... building regex-tdfa-text-1.0.0.2... preprocessing library regex-tdfa-text-1.0.0.2... [1 of 2] compiling text.regex.tdfa.text.lazy ( text/regex/tdfa/text/lazy.hs, dist/build/text/regex/tdfa/text/lazy.o )  text/regex/tdfa/text/lazy.hs:77:9:     non type-variable argument       in constraint: data.array.base.iarray (int, int)     (use flexiblecontexts permit this)     when checking ‘go’ has inferred type       go :: forall t (a :: * -> * -> *) i.             (functor (a i), num i, ghc.arr.ix i,              data.array.base.iarray (int, int), extract t) =>             int -> t -> [a (int, int)] -> [a (t, (int, int))]     in expression:       let         go _ _ | `seq` false = undefined         go _i _t [] = []         go t (x : xs)           = let ... in fmap trans x : seq t' (go (off0 + len0) t' xs)       in go 0 source (matchall regex source)     in equation ‘matchalltext’:         matchalltext regex source           = let               go _ _ | `seq` false = undefined               go _i _t [] = ...               go t (x : xs) = ...             in go 0 source (matchall regex source) cabal: error: packages failed install: leksah-0.15.0.1 depends on regex-tdfa-text-1.0.0.2 failed install. regex-tdfa-text-1.0.0.2 failed during building phase. exception was: exitfailure 1  joco@vm001:~$ cabal --version cabal-install version 1.22.4.0 using version 1.22.3.0 of cabal library   joco@vm001:~$ ghc --version glorious glasgow haskell compilation system, version 7.10.1

run:

cabal install regex-tdfa-text --ghc-options=-xflexiblecontexts

then try again.


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