testsuite/tests/typecheck/should_fail/tcfail189.hs


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-- Checks that the correct type is used checking the using clause of
-- the group when a by clause is present

{-# OPTIONS_GHC -XTransformListComp #-}

module ShouldFail where

foo = [ length x
      | x <- [1..10]
      , then group by x using take 2
      ]