why oh why does the prelude contain unsafe functions

some parts of haskell are really, really old …

lib/CheckDir.hs

@@ -72,7 +72,7 @@ resultIsFatal config res =
 -- note that it really does go through all lints, so don't
 -- call it too often
 maximumLintLevel :: DirResult -> Level
-maximumLintLevel = maximum
+maximumLintLevel = (\t -> if null t then Info else maximum t)
   . map hintLevel
   . concatMap (keys . mapresultLayer)
   . elems