Proposal: Remove the bogus MonadFail instance for ST

[Joachim Breitner]

Hi,

Am Mittwoch, den 14.03.2018, 10:34 -0400 schrieb David Feuer:
> That seems reasonable. But I wonder if pattern matching failure in IO
> do should be allowed to slip by silently, or whether we should
> exclude the otherwise-reasonable instance to catch more mistakes.


main = do
 [path] <- getArgs
 … do some stuff…

is a fairly useful and (presumably) common idiom for small, one-off
scripts. I am leaning to keep allowing that.

Cheers,
Joachim

-- 
Joachim Breitner
  mail at joachim-breitner.de
  http://www.joachim-breitner.de/
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