[Haskell-beginners] How to install new GHC ?

[David McBride]

If your original goal was to test for a ghc panic in newer ghc, my final
suggestion would be to get a minimal example that panics without all these
extra dependencies.  If you happen to find that the bug exists in newer
ghc,  you'd have to do that anyways to submit a useful bug report.

On Tue, Dec 12, 2017 at 9:06 AM, Baa <aquagnu at gmail.com> wrote:

> I done it, but got the same error. My project uses several my packages
> (libraries), they are called 'my-*'. I changed in their .cabal-files
> versions range of "base" too, but error is the same. Build-depends
> stanza of executable looks like:
>
>   build-depends:       base >= 4.9 && < 4.11
>                      , text
>                      , my-common-utils
>                      , my-atlassian-utils
>                      , my-jenkins-utils
>                      , my-git-utils
>                      , aeson
>                      , network-uri
>                      , network-info
>                      , text-show
>                      , hslogger
>                      , bytestring
>                      , transformers
>                      , aeson-pretty
>                      , time
>                      , email-validate
>                      , streaming
>                      , containers
>                      , sqlite-simple
>                      , directory
>                      , tuple
>                      , async
>                      , mime-mail
>                      , HaskellNet
>                      , HaskellNet-SSL
>                      , mustache
>                      , path
>                      , exceptions
>                      , mono-traversable
>                      , data-default-class
>                      , path-io
>                      , split
>                      , microlens
>                      , microlens-th
>                      , regex-pcre
>                      , pcre-utils
>                      , unordered-containers
>                      , formatting
>
>
> > On Tue, Dec 12, 2017 at 03:38:30PM +0200, Baa wrote:
> > > 1. GHC 8.2.2 is here:
> > >    ~/.stack/programs/x86_64-linux/ghc-tinfo6-8.2.2/bin
> > > 2. done
> > > 3. yes, it's 8.2.2
> > > 4. `cabal new-build` said to me call `cabal update`, I done it,
> > > then run it again and got:
> > >     $ cabal new-build
> > >     Resolving dependencies...
> > >     cabal: Could not resolve dependencies:
> > >     trying: XXX-0.5.0.0 (user goal)
> > >     next goal: YYY-utils (dependency of XXX-0.5.0.0)
> > >     Dependency tree exhaustively searched.
> >
> > Good, we're almost there!
> >
> > I strongly suspect it is a base constraint. Go in your something.cabal
> > file, build-depends section(s) and modify it from:
> >
> >     base >= 4.somenumber && < 4.10
> >
> > to
> >
> >     base >= 4.somenumber && < 4.11
> >
> > And try cabal new-build again. If that fails, please include the
> > content of your `build-depends:` portion in your message
> > -F
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