Template Haskell of GHC 7.8

Hi, The tests for doctest are not passed again with GHC 7.8: ---- 17) Property.runProperty reports the values for which a property that takes multiple arguments fails expected: ["False","0","\"\""] but got: ["<interactive>:24:66:"," \8216doctest_prop\8217 is not in the type environment at a reify"," In the splice: $(polyQuickCheck 'doctest_prop)"] ---- This comes from: ----src/Property.hs where quickCheck term vars = "let doctest_prop " ++ unwords vars ++ " = " ++ term ++ " in $(polyQuickCheck 'doctest_prop)" ---- It seems to me that the behavior of GHC 7.8's Template Haskell changed. Would you tell me how to fix this? --Kazu