As an example that this actually makes problems in production code, I found this in the wildlife:
https://github.com/ndmitchell/shake/blob/e0e0a43/Development/Shake/Database.hs#L394 -- Do not use a forM here as you use too much stack space bad <- (\f -> foldM f [] (Map.toList status)) $ \seen (i,v) -> ... I could bet that there is a lot of code around on which we rely, which has the same problem but does not go that far in customisation. _______________________________________________ Haskell-Cafe mailing list Haskell-Cafe@haskell.org http://www.haskell.org/mailman/listinfo/haskell-cafe
