[darcs-devel] [patch1951] resolve 2616: Unbreak with base-4.13 — `Mon

[Ganesh Sittampalam]

Ganesh Sittampalam <ganesh at earth.li> added the comment:

I can reproduce the build problems myself now, I hadn't realised 
that MonadFail wasn't completely done in GHC 8.6:

https://wiki.haskell.org/MonadFail_Proposal

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