Bug#814415: gnuplot5: inconsistency on dependencies

[Vincent Lefevre]

Source: gnuplot5
Version: 5.0.3+dfsg1-1
Severity: serious
Justification: 7

When I want to upgrade gnuplot5-qt to 5.0.3+dfsg1-1, it wants to
remove gnuplot-x11:

# apt-get install gnuplot5-qt
Reading package lists... Done
Building dependency tree       
Reading state information... Done
The following package was automatically installed and is no longer required:
  linux-image-4.1.0-2-amd64
Use 'apt autoremove' to remove it.
The following additional packages will be installed:
  gnuplot5-data
The following packages will be REMOVED:
  gnuplot-x11
The following packages will be upgraded:
  gnuplot5-data gnuplot5-qt
2 upgraded, 0 newly installed, 1 to remove and 34 not upgraded.

If the goal is to get rid of gnuplot4, then it should no longer
depend on it: gnuplot5-data 5.0.3+dfsg1-1 depends on gnuplot-tex,
which mentions gnuplot-x11 for X11 output:

Package: gnuplot-tex
Status: install ok installed
Priority: optional
Section: doc
Installed-Size: 131
Maintainer: Debian Science Team <debian-science-maintainers at lists.alioth.debian.org>
Architecture: all
Source: gnuplot
Version: 4.6.6-3
Breaks: gnuplot-nox (<< 4.6.5-5), gnuplot-qt (<< 4.6.5-5), gnuplot-x11 (<< 4.6.5-5)
Description: Command-line driven interactive plotting program. Tex-files
 Gnuplot is a portable command-line driven interactive data and function
 plotting utility that supports lots of output formats, including drivers
 for many printers, (La)TeX, (x)fig, Postscript, and so on. The X11-output
 is packaged in gnuplot-x11.
[...]

BTW, gnuplot5-data also mentions gnuplot-x11.

-- System Information:
Debian Release: stretch/sid
  APT prefers unstable-debug
  APT policy: (500, 'unstable-debug'), (500, 'stable-updates'), (500, 'unstable'), (500, 'testing'), (500, 'stable'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386

Kernel: Linux 4.3.0-1-amd64 (SMP w/12 CPU cores)
Locale: LANG=POSIX, LC_CTYPE=en_US.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)