Hi,

How does confirm that this bug is being hit. `stack haddock haskell-src-exts` on LTS-12.1 fails with the following cryptic error:

-- While building custom Setup.hs for package haskell-src-exts-1.20.2 using:

/home/vl/.stack/setup-exe-cache/x86_64-linux/Cabal-simple_mPHDZzAJ_2.2.0.1_ghc-8.4.3 --builddir=.stack-work/dist/x86_64-linux/Cabal-2.2.0.1 haddock --html --hoogle --html-location=../$pkg-$version/ --haddock-option=--hyperlinked-source

Process exited with code: ExitFailure (-11)

Logs have been written to: /home/vl/vacationlabs/haskell/.stack-work/logs/haskell-src-exts-1.20.2.log

The log file doesn't contain an error.

How does one upgrade the haddock version and get stack to use it?

-- Saurabh.

On Mon, Jul 23, 2018 at 11:58 AM Sven Panne <svenpanne@gmail.com> wrote:

Am Mo., 23. Juli 2018 um 05:49 Uhr schrieb Yuji Yamamoto <whosekiteneverfly@gmail.com>:
Thank you very much!

I confirmed the replaced haddock executable can successfully generate the docs!

Yesterday I had quite some trouble because of the Haddock problem, too, and I guess I'm not alone: haskell-src-exts has 165 direct reverse dependencies, so probably hundreds of Hackage packages are affected by this. The workaround is simple (don't use --haddock with stack), but far from satisfying and not very obvious.

Given the fact that this affects a very central piece of the Haskell infrastructure in its latest stable incarnation (GHC 8.4.3): Can we have an 8.4.4 with a fixed Haddock?
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