Hi Ryan, I hope to be able to reproduce the ConstraintKinds bug in a minimal example later today. I believe that the cabal bug might be something to do with my nix setup so will investigate more to see how nix installs Haskell packages under the hood. Will follow-up as soon as I can.
Thanks! Alberto On Fri, May 19, 2017 at 7:39 PM, Ryan Scott <ryan.gl.sc...@gmail.com> wrote: > A follow-up: > > * The fact that the fingertree test suite doesn't terminate is an > occurrence of a known bug, GHC Trac #13429 [1]. > * I just ran the lens test suite with GHC 8.2, and it terminated [2]. It > does take a while, though, sound it's understandable that one would think > it loops forever if you don't have the patience to let it finish :) > > Again, I'm not able to reproduce the ConstraintKinds or Cabal regressions > you reported, so it would be tremendously helpful if you could submit bug > reports explaining how to trigger those issues. Thanks! > > Ryan S. > ----- > [1] https://ghc.haskell.org/trac/ghc/ticket/13429#comment:16 > [2] https://travis-ci.org/ekmett/lens/jobs/231611970 > > On Fri, May 19, 2017 at 9:16 AM, Ryan Scott <ryan.gl.sc...@gmail.com> > wrote: > >> Hi Alberto. Thanks for the very detailed report! >> >> > - A weird kind error when using ConstraintKinds in a propietary package >> > which didn't manifest itself with ghc < 8.2: >> > >> > ... >> > >> > Is this expected behaviour? >> > Should I try to isolate and open a ticket? >> >> This looks like a proper bug to me. Can you minimize the example a submit >> a bug report at https://ghc.haskell.org/trac/ghc/newticket for this? >> Thanks! >> >> > - I had to disable the tests for two packages since they seem to "hang" >> > (ie: they never finish running and don't seem to consume any CPU time). >> > These packages are lens-4.15.1 and fingertree-0.1.1.0. Maybe it's a Nix >> > environmental issue, I'm not sure. Can anyone reproduce this? >> >> The fact that the lens tests run forever sounds unusual to me, as the >> lens repo has been running regression tests with GHC 8.2 for a while with >> no observed slowdowns. I'll double-check soon just to be sure, though. >> >> However, I can confirm that the fingertree tests appear to loop forever >> at runtime with GHC 8.2 (as opposed to GHC 8.0, where they finish in about >> 7.5 seconds). This is certainly not a good thing, so I'll try to >> investigate this more. Thanks for noticing this. >> >> > - I can't manage to install several packages which include executables >> > (namely, update-nix-fetchgit and snap-server, for the moment) because >> Cabal >> > says that it cannot find the source for the main module of the >> executables: >> > >> > "Setup: can't find source for Main in ." >> > >> > It seems that the "hs-source-dir" directive in the .cabal file is not >> being >> > honored. Maybe a Nix-only issue? Can anyone reproduce this? Any ideas on >> > how can I fix it? >> >> I can't reproduce this issue, at least with update-nix-fetchgit-0.1.0.0 >> (by using `cabal install` to install it). Can you give more detailed >> instructions on how to trigger this error? >> >> Ryan S. >> > > > _______________________________________________ > ghc-devs mailing list > ghc-devs@haskell.org > http://mail.haskell.org/cgi-bin/mailman/listinfo/ghc-devs > >
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