[Haskell-cafe] regex problem with ghc-8.6 and older

Travis Cardwell travis.cardwell at extrema.is
Sun May 28 20:53:18 UTC 2023

The `fail` method was part of the `Monad` type class from GHC 8.0
(`base` ``) until GHC 8.6 (`base` ``).


It was removed from GHC 8.8 (`base` ``).


There is information about this in the MonadFail Proposal (MFP):




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