Bug#792698: libghc-chart-dev: Package is useless without at least one backend

[Dylan Thurston]

Package: libghc-chart-dev
Version: 1.3.3-4
Severity: important

The Chart package has been reorganized, so that the rendering backends
are in separate packages, currently chart-cairo and
chart-diagrams. Neither of these seem to be packaged for Debian, which
I believe makes this package (libghc-chart-dev) useless, as it can't
produce output.

-- System Information:
Debian Release: stretch/sid
  APT prefers oldstable-updates
  APT policy: (500, 'oldstable-updates'), (500, 'unstable'), (500, 'testing'), (500, 'oldstable')
Architecture: amd64 (x86_64)

Kernel: Linux 4.0.0-2-amd64 (SMP w/4 CPU cores)
Locale: LANG=en_US.utf8, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages libghc-chart-dev depends on:
ii  ghc [libghc-time-dev-1.4.2-7808a]                              7.8.4-9
ii  libc6                                                          2.19-19
pn  libghc-array-dev-0.5.0.0-04535                                 <none>
pn  libghc-base-dev-4.7.0.2-5ef1e                                  <none>
ii  libghc-colour-dev [libghc-colour-dev-2.3.3-8008a]              2.3.3-6+b3
ii  libghc-data-default-class-dev [libghc-data-default-class-dev-  0.0.1-3+b3
ii  libghc-lens-dev [libghc-lens-dev-4.7.0.1-5aa6f]                4.7.0.1-1+b1
ii  libghc-mtl-dev [libghc-mtl-dev-2.1.3.1-04d52]                  2.1.3.1-3+b3
pn  libghc-old-locale-dev-1.0.0.6-4bde6                            <none>
ii  libghc-operational-dev [libghc-operational-dev-0.2.3.2-13f19]  0.2.3.2-3+b3

libghc-chart-dev recommends no packages.

Versions of packages libghc-chart-dev suggests:
ii  libghc-chart-doc   1.3.3-4
pn  libghc-chart-prof  <none>

-- no debconf information