Guard redundant equations #19
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GHC's exhaustiveness checker used to be quite rudimentary. As of GHC 8.0 we have a new exhaustiveness checker which correctly recognizes the cases covered by these equations as invalid.
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@michalt please feel free to implement a different approach if you would prefer. I wanted to merge quickly this to allow the GHC tree to validate again. Sorry for the intrusion. |
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GHC's exhaustiveness checker used to be quite rudimentary. As of GHC
8.0 we have a new exhaustiveness checker which correctly recognizes the
cases covered by these equations as invalid.