Bug#864597: upgrade-reports: jessie -> stretch: gnome fails to upgrade: cycle found while processing triggers

[Cyril Brulebois]

Package: upgrade-reports
Severity: critical
Justification: makes upgrade from stable abort

[ X-D-Cc:
  debian-release at lists.debian.org
  pkg-java-maintainers at lists.alioth.debian.org
  pkg-gnome-maintainers at lists.alioth.debian.org ]

Hi,

Regression spotted by Pere in some debian-edu job, but also seen since
the 2nd of June in normal gnome chroot installation then upgrade from
jessie to stretch:
  https://jenkins.debian.net/view/edu_devel/job/chroot-installation_jessie_install_education-desktop-gnome_upgrade_to_stretch/
  https://jenkins.debian.net/job/chroot-installation_jessie_install_gnome_upgrade_to_stretch/

I've managed to reproduce it locally with basically a debootstrap of
jessie, installation of gnome, then switch sources.list from jessie to
stretch, then update & upgrade & dist-upgrade.

I've bisected the archive using snapshot.debian.org and found out:
 - 20170601T212625Z = last timestamp found to be OK;
 - 20170602T033358Z = first timestamp to be KO.

Since logs are a bit too heavy for a bug report, I've uploaded them
there:
  https://people.debian.org/~kibi/jessie2stretch/gnome/

$timestamp.log is the output of the installation & dist-upgrade process,
while $timestamp.log.clean is a cleaned version (with Get: lines edited
to remove the package indice and the timestamp, then sort them by block,
so as to avoid a huge diff).

Then I've generated upgrade.diff by diffing both clean versions:
  https://people.debian.org/~kibi/jessie2stretch/gnome/upgrade.diff

This file consists mainly of some differences which should help us
pinpoint the exact issue (first part of the diff), but also of a big
diff at the end, since the OK log goes on with the install while the KO
one is cut rather quickly. Actual error follows:
| Unpacking default-jre-headless (2:1.8-58) over (2:1.7-52) ...
| Processing triggers for libc-bin (2.24-10) ...
| Processing triggers for hicolor-icon-theme (0.15-1) ...
| Processing triggers for desktop-file-utils (0.23-1) ...
| Processing triggers for man-db (2.7.6.1-2) ...
| Processing triggers for libglib2.0-0:amd64 (2.50.3-2) ...
| (Reading database ... 129883 files and directories currently installed.)
| Removing openjdk-7-jre:amd64 (7u111-2.6.7-1~deb8u1) ...
| Removing openjdk-7-jre-headless:amd64 (7u111-2.6.7-1~deb8u1) ...
| Removing tzdata-java (2017b-0+deb8u1) ...
| Processing triggers for hicolor-icon-theme (0.15-1) ...
| dpkg: cycle found while processing triggers:
|  chain of packages whose triggers are or may be responsible:
|   gnome-menus -> desktop-file-utils
|  packages' pending triggers which are or may be unresolvable:
|   gnome-menus: /usr/share/applications
|   shared-mime-info: /usr/share/mime/packages
|   desktop-file-utils: /usr/share/applications
| dpkg: error processing package gnome-menus (--remove):
|  triggers looping, abandoned
| Processing triggers for desktop-file-utils (0.23-1) ...
| Errors were encountered while processing:
|  gnome-menus
| E: Sub-process /usr/bin/dpkg returned an error code (1)

By looking at the diff before that, this might have been triggered (no
pun intended) by the ca-certificates-java update, which included changes
in the required java version, which might explain why this block was
present in the OK log but no longer in the KO one?
| -dpkg: openjdk-7-jre-headless:amd64: dependency problems, but removing anyway as you requested:
| - ca-certificates-java depends on openjdk-7-jre-headless | java7-runtime-headless; however:
| -  Package openjdk-7-jre-headless:amd64 is to be removed.
| -  Package java7-runtime-headless is not installed.
| -  Package openjdk-8-jre-headless:amd64 which provides java7-runtime-headless is not configured yet.
| -  Package default-jre-headless which provides java7-runtime-headless is not configured yet.
| -  Package openjdk-7-jre-headless:amd64 which provides java7-runtime-headless is to be removed.
| - ca-certificates-java depends on openjdk-7-jre-headless | java7-runtime-headless; however:
| -  Package openjdk-7-jre-headless:amd64 is to be removed.
| -  Package java7-runtime-headless is not installed.
| -  Package openjdk-8-jre-headless:amd64 which provides java7-runtime-headless is not configured yet.
| -  Package default-jre-headless which provides java7-runtime-headless is not configured yet.
| -  Package openjdk-7-jre-headless:amd64 which provides java7-runtime-headless is to be removed.
| -

I don't see any immediate solutions (mostly because it's the first dpkg
triggers cycle I encounter), but this looks like something that really
should be fixed before the stretch release, hence the severity and the
x-d-cc list.


KiBi.