Bug#1015280: haskell-pipes-zlib FTBFS: error: Couldn't match type

[Adrian Bunk]

Source: haskell-pipes-zlib
Version: 0.4.4.2-3
Severity: serious
Tags: ftbfs bookworm sid

https://buildd.debian.org/status/package.php?p=haskell-pipes-zlib&suite=sid

...
src/Pipes/Zlib.hs:81:13: error:
    • Couldn't match type: forall x'1 x1.
                           Proxy x'1 x1 () B.ByteString m0 ()
                     with: Proxy x' x () B.ByteString m1 a0
      Expected: Popper -> Proxy x' x () B.ByteString m1 a0
        Actual: Popper -> Producer' B.ByteString m0 ()
    • In the first argument of ‘(=<<)’, namely ‘fromPopper’
      In a stmt of a 'do' block:
        fromPopper =<< liftIO (feedInflate inf bs)
      In the expression:
        do fromPopper =<< liftIO (feedInflate inf bs)
           flush inf
           leftover <- liftIO $ getUnusedInflate inf
           if B.null leftover then
               go p' inf
           else
               return $ Left (yield leftover >> p')
    • Relevant bindings include
        p' :: Producer B.ByteString m1 b (bound at src/Pipes/Zlib.hs:80:21)
        res :: Either b (B.ByteString, Producer B.ByteString m1 b)
          (bound at src/Pipes/Zlib.hs:77:7)
        p :: Producer B.ByteString m1 b (bound at src/Pipes/Zlib.hs:76:8)
        go :: Producer B.ByteString m1 b
              -> Inflate
              -> Proxy
                   x'
                   x
                   ()
                   B.ByteString
                   m1
                   (Either (Proxy X () () B.ByteString m1 b) b)
          (bound at src/Pipes/Zlib.hs:76:5)
   |
81 |             fromPopper =<< liftIO (Z.feedInflate inf bs)
   |             ^^^^^^^^^^
 at /usr/share/perl5/Debian/Debhelper/Buildsystem/Haskell/Recipes.pm line 107.
	Debian::Debhelper::Buildsystem::Haskell::Recipes::run_quiet("debian/hlibrary.setup", "haddock", "--builddir=dist-ghc", "--with-haddock=/usr/bin/haddock", "--with-ghc=ghc", "--verbose=2", "--html", "--hoogle", ...) called at /usr/share/perl5/Debian/Debhelper/Buildsystem/Haskell/Recipes.pm line 131
	Debian::Debhelper::Buildsystem::Haskell::Recipes::run("debian/hlibrary.setup", "haddock", "--builddir=dist-ghc", "--with-haddock=/usr/bin/haddock", "--with-ghc=ghc", "--verbose=2", "--html", "--hoogle", ...) called at /usr/share/perl5/Debian/Debhelper/Buildsystem/Haskell/Recipes.pm line 709
	Debian::Debhelper::Buildsystem::Haskell::Recipes::haddock_recipe() called at -e line 1
make: *** [/usr/share/cdbs/1/class/hlibrary.mk:153: build-ghc-stamp] Error 25