Bug#1013795: haskell-maths FTBFS: error: Bang pattern in expression context: !j

[Adrian Bunk]

Source: haskell-maths
Version: 0.4.9-2
Severity: serious
Tags: ftbfs bookworm sid

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

...
Math/Algebra/LinearAlgebra.hs:222:60: error:
    Bang pattern in expression context: !j
    Did you mean to add a space after the '!'?
    |
222 |                    in zip is $ L.transpose [map (negate . (!j)) m' | j <- js]

    |                                                            ^^
 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