cabal new-install haddock-api fails with GHC 8.8.2

[alanz]

cabal new-install haddock-api --with-compiler=ghc-8.8.2 fails with

src/Haddock/Convert.hs:621:39: error:
    • Variable not in scope: injectiveVarsOfBinder :: TyConBinder -> FV
    • Perhaps you meant ‘injectiveVarsOfType’ (imported from TyCoRep)
    |
621 |                            mapUnionFV injectiveVarsOfBinder dropped_binders
    |                                       ^^^^^^^^^^^^^^^^^^^^^
cabal: Failed to build haddock-api-2.23.0. See the build log above for
details.

cabal index : hackage.haskell.org,2020-01-24T20:23:40Z

Building from https://github.com/haskell/haddock at be8b02c succeeds, but pulls in haddock-library-1.8.0.1.

~/mysrc/github/haskell/haddock$ cabal new-install --with-compiler=ghc-8.8.2
Wrote tarball sdist to
/home/alanz/mysrc/github/haskell/haddock/dist-newstyle/sdist/haddock-2.23.0.tar.gz
Wrote tarball sdist to
/home/alanz/mysrc/github/haskell/haddock/dist-newstyle/sdist/haddock-api-2.23.0.tar.gz
Wrote tarball sdist to
/home/alanz/mysrc/github/haskell/haddock/dist-newstyle/sdist/haddock-library-1.8.0.1.tar.gz
Wrote tarball sdist to
/home/alanz/mysrc/github/haskell/haddock/dist-newstyle/sdist/haddock-test-0.0.1.tar.gz
Resolving dependencies...
Build profile: -w ghc-8.8.2 -O1
In order, the following will be built (use -v for more details):
 - haddock-library-1.8.0.1 (lib) (requires build)
 - haddock-api-2.23.0 (lib) (requires build)
 - haddock-2.23.0 (exe:haddock) (requires build)
Starting     haddock-library-1.8.0.1 (lib)
Building     haddock-library-1.8.0.1 (lib)
Installing   haddock-library-1.8.0.1 (lib)
Completed    haddock-library-1.8.0.1 (lib)
Starting     haddock-api-2.23.0 (lib)
Building     haddock-api-2.23.0 (lib)
Installing   haddock-api-2.23.0 (lib)
Completed    haddock-api-2.23.0 (lib)
Starting     haddock-2.23.0 (exe:haddock)
Building     haddock-2.23.0 (exe:haddock)
Installing   haddock-2.23.0 (exe:haddock)
Completed    haddock-2.23.0 (exe:haddock)
Symlinking 'haddock'

So it seems haddock-library-1.8.0.1 needs to go onto hackage?

[jneira]

Any update on this? haskell-ide-engine users are hitting this issue and we aim to make a workaround if there is no release in the short term

[harpocrates]

This situation is frustrating indeed. It looks like GHC made some changes directly to the 8.8 branch of Haddock in e6ca100, breaking the build for 8.8.1 in the process. What's worse is that 8.8.2 can only build with this commit. 😠

I'll see what I can do to make some sort of small release and bounds updates to Hackage to deal with this issue.

[harpocrates]

Alright. This should be fixed now - sorry for the long delay.

• haddock-api-2.23.0 had its bounds revised to build only with 8.8.1
• haddock-api-2.23.1 was released to build only with 8.8.2 or higher (and with virtually no user-visible changes compared to 2.23.0)