Note that this only happens with `aeson`, which is the package that the tutorial asks to add to `extra-packages` in 'cabal.project'.
El mar., 10 sept. 2019 a las 19:17, Alejandro Serrano Mena (< [email protected]>) escribió: > The instructions are quite clear. Alas, when I try to reproduce the steps > using my home-build compiler (for which I mean set the `with-compiler` in > `cabal.project` to the stage2 compiler obtained by Hadrian), I get: > > > cabal new-install --lib aeson > Distribution/Client/CmdInstall.hs:(361,18)-(363,72): Non-exhaustive > patterns in lambda > > Do you have any idea of what I might be doing wrong? > > Thanks in advance, > Alejandro > > El mar., 10 sept. 2019 a las 12:32, Ben Gamari (<[email protected]>) > escribió: > >> Alejandro Serrano Mena <[email protected]> writes: >> >> > Dear GHC devs, >> > As part of our work in "quick look impredicativity", we would like to >> test >> > whether any package breaks. I've read about "head.hackage" as a way to >> test >> > this fact, but I could not find any information. >> > >> > Could somebody point me in the right direction? If it does not exist >> yet, >> > I'll try to summarize whatever I learn in the wiki for future reference. >> > >> Hi Alejandro, >> >> Indeed I have a pair of yet-to-be-published blog posts intended to >> discuss exactly this. See [1] and [2]. Do let me know if you have any >> questions. >> >> Cheers, >> >> - Ben >> >> >> [1] https://gitlab.haskell.org/ghc/homepage/merge_requests/16/diffs >> [2] https://gitlab.haskell.org/ghc/homepage/merge_requests/29/diffs >> >
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