Hi cafe,
            
            Is there anyone on this list that can explain how to replace
            the haddock executable to solve the problem below? I
            replaced some haddock binary (which I build adding
            haddock-api-2.20.0 to my global stack config and doing stack
            install haddock), and I now have:
            
            $ ~/.stack/programs/x86_64-linux/ghc-8.4.3/bin/haddock
            --version
            Haddock version 2.20.0, (c) Simon Marlow 2006
            Ported to use the GHC API by David Waern 2006-2008
            
            This seems to be the latest Haddock release (and I am using
            Stack 1.7.1 which is also the latest), but my `stack
            haddock` build still results the same error as below
            (ExitFailure (-11)).
            
            Jeroen Bransen
            
            
Op
              26-7-2018 om 16:53 schreef Saurabh Nanda:
            
            
              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.
                
                
              
              
                
                
                  
                    
                      
                      
                        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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              -- 
              
              
              
              
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