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So I've noticed for some time now a warning while building:
Shim/Utils.hs:40:0:
Warning: Module `Data.List' is imported, but nothing from it is used,
except perhaps instances visible in `Data.List'
To suppress this warning, use: import Data.List()
Being -Wall clean is nice, so I went to fix it. But I am a little
flummoxed: Data.List is indeed being used, for 'elem', and the using
function is in fact exported. It is, as far as I can tell, most
definitely used. You can remove it and cause a compile failure, the
function is specified in the export list, and so on. It's not the
infix syntax either (I tried using 'elem' prefix, since I know
there've been some problems with the `infix` stuff in 6.10).
So is this just a false positive by GHC?
- --
gwern
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