Bug#866991: libcpan-meta-perl: uninstallable in unstable

[Sven Joachim]

Package: libcpan-meta-perl
Version: 2.150010-1
Tags: buster sid
Severity: serious

After the switch to versioned Provides in perl, libcpan-meta-perl has
become uninstallable.  This happens with perl-modules-5.24 5.24.1-5
installed on the system:

,----
| # dpkg -i /var/cache/apt/archives/libcpan-meta-perl_2.150010-1_all.deb 
| dpkg: regarding .../libcpan-meta-perl_2.150010-1_all.deb containing libcpan-meta-perl:
|  libcpan-meta-perl breaks libparse-cpan-meta-perl (<< 1.4420)
|   perl-modules-5.24 provides libparse-cpan-meta-perl and is present and installed.
| 
| dpkg: error processing archive /var/cache/apt/archives/libcpan-meta-perl_2.150010-1_all.deb (--install):
|  installing libcpan-meta-perl would break perl-modules-5.24, and
|  deconfiguration is not permitted (--auto-deconfigure might help)
| Errors were encountered while processing:
|  /var/cache/apt/archives/libcpan-meta-perl_2.150010-1_all.deb
`----

Short analysis:

- libcpan-meta-perl depends on perl which depends on perl-modules-5.24
- libcpan-meta-perl breaks libparse-cpan-meta-perl (<< 1.4420)
- perl-modules-5.24 provides libparse-cpan-meta-perl (= 1.4417.001)

=> libcpan-meta-perl both depends on and breaks perl-modules-5.24.


-- System Information:
Debian Release: buster/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (101, 'experimental')
Architecture: i386 (x86_64)
Foreign Architectures: amd64

Kernel: Linux 4.11.8-nouveau (SMP w/2 CPU cores)
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), LANGUAGE=de_DE.UTF-8 (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash
Init: systemd (via /run/systemd/system)

Versions of packages libcpan-meta-perl depends on:
ii  perl                                 5.24.1-4
ii  perl-modules-5.24 [libjson-pp-perl]  5.24.1-4

libcpan-meta-perl recommends no packages.

libcpan-meta-perl suggests no packages.

-- no debconf information