Bug#1014009: haskell-dice FTBFS: No instance for (mtl-2.2.2:Control.Monad.Reader.Class.MonadReader g0 IO)

[Adrian Bunk]

Source: haskell-dice
Version: 0.1.0.1-1
Severity: serious
Tags: ftbfs bookworm sid

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

...
src/Data/Random/Dice.hs:174:15: error:
    • No instance for (mtl-2.2.2:Control.Monad.Reader.Class.MonadReader
                         g0 IO)
        arising from a use of ‘sample’
    • In the first argument of ‘($)’, namely ‘sample’
      In a stmt of a 'do' block:
        ex <- sample $ runExpr ex :: IO (Expr [Integer])
      In the expression:
        do ex <- sample $ runExpr ex :: IO (Expr [Integer])
           return (Right (fmtSimpleRational (fmap (summarizeRollsOver 3) ex)))
    |
174 |         ex <- sample $ runExpr ex :: IO (Expr [Integer])
    |               ^^^^^^

src/Data/Random/Dice.hs:193:48: error:
    • Could not deduce (random-1.2.1.1:System.Random.Internal.UniformRange
                          a)
        arising from a use of ‘integralUniform’
      from the context: Integral a
        bound by the type signature for:
                   roll :: forall a. Integral a => a -> a -> RVar [a]
        at src/Data/Random/Dice.hs:183:1-42
      Possible fix:
        add (random-1.2.1.1:System.Random.Internal.UniformRange
               a) to the context of
          the type signature for:
            roll :: forall a. Integral a => a -> a -> RVar [a]
    • In the second argument of ‘replicateM’, namely
        ‘(integralUniform 1 sides)’
      In a stmt of a 'do' block:
        ls <- replicateM (fromIntegral count) (integralUniform 1 sides)
      In the expression:
        do ls <- replicateM (fromIntegral count) (integralUniform 1 sides)
           return ls
    |
193 |         ls <- replicateM (fromIntegral count) (integralUniform 1 sides)
    |                                                ^^^^^^^^^^^^^^^^^^^^^^^
 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 707
	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