[Haskell-cafe] Safe lens?

[Greg Fitzgerald]

Why are getters from the 'lens' package unsafe?  Is there a subset
like Data.Label.Pure from 'fclabels' that can be imported safely?


$ cat a.hs
{-# LANGUAGE Safe #-}

import Control.Lens.Getter

main = print 123

$ runghc a.hs

a.hs:3:1:
    Control.Lens.Getter: Can't be safely imported!
    The module itself isn't safe.


Thanks,
Greg