[Pkg-gmagick-im-team] Bug#847282: imagemagick-doc: fails to upgrade wheezy -> jessie -> stretch

[Andreas Beckmann]

Package: imagemagick-doc
Version: 8:6.9.6.6+dfsg-1
Severity: serious
User: debian-qa at lists.debian.org
Usertags: piuparts

Hi,

during a test with piuparts I noticed your package fails to upgrade from
'wheezy' to 'jessie' to 'stretch'.
It installed fine in 'wheezy', and upgraded to 'jessie' successfully,
but then the upgrade to 'stretch' failed.

>From the attached log (scroll to the bottom...):

  Preparing to unpack .../imagemagick-doc_8%3a6.9.6.6+dfsg-1_all.deb ...
  dpkg-maintscript-helper: error: directory '/usr/share/doc/imagemagick-doc' contains files not owned by package imagemagick-doc:all, cannot switch to symlink
  dpkg: error processing archive /var/cache/apt/archives/imagemagick-doc_8%3a6.9.6.6+dfsg-1_all.deb (--unpack):
   subprocess new pre-installation script returned error exit status 1


Let's see what we have there:

# ls -la /usr/share/doc/imagemagick-doc
total 176
drwxr-xr-x   4 root root   220 Dec  6 22:15 .
drwxr-xr-x 117 root root  2500 Dec  6 22:16 ..
-rw-r--r--   1 root root   991 Aug 16 12:13 NEWS.Debian.gz
-rw-r--r--   1 root root 31950 Aug 16 12:13 changelog.Debian.gz
-rw-r--r--   1 root root 77347 Oct 25  2014 changelog.gz
-rw-r--r--   1 root root 42835 Aug 16 12:13 copyright
drwxr-xr-x   3 root root  1040 Dec  6 22:15 images
lrwxrwxrwx   1 root root    21 Apr  7  2016 images.dpkg-backup -> ../imagemagick/images
-rw-r--r--   1 root root 18947 Aug 25 12:05 index.html
drwxr-xr-x   5 root root  1340 Dec  6 22:15 www
lrwxrwxrwx   1 root root    18 Apr  7  2016 www.dpkg-backup -> ../imagemagick/www

# dpkg -S /usr/share/doc/imagemagick-doc/*
imagemagick-doc: /usr/share/doc/imagemagick-doc/NEWS.Debian.gz
imagemagick-doc: /usr/share/doc/imagemagick-doc/changelog.Debian.gz
imagemagick-doc: /usr/share/doc/imagemagick-doc/changelog.gz
imagemagick-doc: /usr/share/doc/imagemagick-doc/copyright
imagemagick-doc: /usr/share/doc/imagemagick-doc/images
dpkg-query: no path found matching pattern /usr/share/doc/imagemagick-doc/images.dpkg-backup
imagemagick-doc: /usr/share/doc/imagemagick-doc/index.html
imagemagick-doc: /usr/share/doc/imagemagick-doc/www
dpkg-query: no path found matching pattern /usr/share/doc/imagemagick-doc/www.dpkg-backup


So it's probably the .dpkg-backup files left from the wheezy->jessie upgrade
that are now causing problems.


cheers,

Andreas
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