When emerging cabal (`emerge cabal`), the compilation fails when compiling the 234th item. When looking at the build log, the last line before failure is: [234 of 235] Compiling Distribution.Simple.Test ( Distribution/Simple/Test.hs, dist/build/Distribution/Simple/Test.o ) Looking quickly at the build log if I try to build it manually, it seems there is a problem with Parsec.hs, unfortunately, I am not familiar with haskell, so I can't investigate further than that. N.B.: From the emerge--info log, you can see that I have the haskell overlay. However, I *do* speak about the regular cabal ebuild. Reproducible: Always Steps to Reproduce: 1. emerge -j1 =dev-haskell/cabal-3.0.1.0 2. 3. Actual Results: Standard emerge failure. Expected Results: Build success.
Created attachment 657880 [details] emerge info
Created attachment 657882 [details] emerge build log
Created attachment 657884 [details] Standard error output when manually trying to build the package. This file is obtained by runing the following commands after an unsuccessul build: $ cd /var/tmp/portage/dev-haskell/cabal-3.0.1.0/work/Cabal-3.0.1.0 $ ./setup build 2> manual_build_error.log
""" Distribution/PackageDescription/Parsec.hs:237:9: error: • No instance for (Control.Monad.Trans.Class.MonadTrans (StateT SectionS)) arising from a use of ‘lift’ There are instances for similar types: instance [safe] Control.Monad.Trans.Class.MonadTrans (Control.Monad.Trans.State.Strict.StateT s) -- Defined in ‘Control.Monad.Trans.State.Strict’ instance [safe] Control.Monad.Trans.Class.MonadTrans (Control.Monad.Trans.State.Lazy.StateT s) -- Defined in ‘Control.Monad.Trans.State.Lazy’ """ This probably hints at incompatibility between ghc-8.0's transformers API and requirement of Cabal-3. Unless you really need it I suggest upgrading ghc to 8.8 first. Normally 'emerge -vuDN @world' would do it. Or you specifically need ghc-8.0?
Indeed, with an higher version of ghc it works. Do you think it might be useful to update the RDEPEND of the ebuild with `>=dev-lang/ghc-8.8` or something like that (I don't know exactly the lower bound to put) ?
Yeah, that's a very reasonable suggestion!
The bug has been closed via the following commit(s): https://gitweb.gentoo.org/repo/gentoo.git/commit/?id=f9e51610b060ca7f4c21eecefd6a2b666067ce25 commit f9e51610b060ca7f4c21eecefd6a2b666067ce25 Author: Sergei Trofimovich <slyfox@gentoo.org> AuthorDate: 2020-09-04 11:47:50 +0000 Commit: Sergei Trofimovich <slyfox@gentoo.org> CommitDate: 2020-09-04 11:48:35 +0000 dev-haskell/cabal: requre ghc-8.8 for 3.0.1.0 Reported-by: martin@vassor.org Closes: https://bugs.gentoo.org/740034 Package-Manager: Portage-3.0.5, Repoman-3.0.1 Signed-off-by: Sergei Trofimovich <slyfox@gentoo.org> dev-haskell/cabal/cabal-3.0.1.0.ebuild | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
