On Fr, 2010-08-06 at 11:04 -0400, Lucas Nussbaum wrote:
> On 06/08/10 at 11:35 +0200, Julian Andres Klode wrote:
> > On Fr, 2010-08-06 at 02:40 -0400, Lucas Nussbaum wrote:
> > > Package: apt
> > > Version: 0.7.25.3
> > > Severity: serious
> > >
> > > Hi,
> > >
> > > I have been testing upgrades from lenny to sid with a tool similar to
> > > piuparts. I ran into many (~80) strange failures, where apt takes a
> > > wrong decision about which packages to upgrade.
> > >
> > > All the logs are available from
> > > http://people.debian.org/~lucas/logs/2010/08/05/pkg-upgrade/
> > > Here are the various cases:
> > > package-not-upgraded/:
> > > The package under test was not upgraded during apt-get dist-upgrade.
> > > That is always because upgrading it would have required the removal of
> > > another package. However, in the case of library packages being removed
> > > to permit the upgrade, I was wondering whether it was possible to trick
> > > apt into upgrading the package.
> > >
> > > package-uninstalled/:
> > > The package under test was removed during apt-get dist-upgrade.
> > >
> > > package-uninstalled/no-removal/ <= that's where the serious issues are
> > > The package under test was removed during dist-upgrade, but no removal
> > > was neded to get it back! It should really have been upgraded together
> > > with the other packages.
> > > There are quite a lot of failures related to emacs packages, so they
> > > are separated in the logs.
> > >
> > > package-uninstalled/removals/:
> > > A package was removed to permit the upgrade. I'm wondering if in some
> > > cases, it would have made sense to auto-detect the correct solution.
> >
> > Please use a two stage upgrade process:
> > apt-get upgrade
> > apt-get dist-upgrade
> > This will reduce the number of issues.
>
> I'm now doing:
> apt-get install apt (to upgrade apt)
> apt-get upgrade
> apt-get dist-upgrade
> And I don't really see any difference (I haven't tested all the packages
> that were failing).
>
> Good examples of packages that fail are pyrex-mode and
> python-application. Both get removed during apt-get dist-upgrade, but
> can be installed without removing any package after that.
>
For pyrex-mode:
The reason is that dpkg breaks emacs21 and that confuses APT. APT views
it like this:
pyrex-mode => python-mode => emacs21
The following solution is ignored, because python-mode is already
installed:
pyrex-mode (Depends: python-mode or emacs22) => emacs22
The following solution is ignored because emacsen is already installed
(provided by emacs21):
pyrex-mode => python-mode (Depends: emacs22 | emacsen) => emacs22
Because dpkg breaks emacs21, the chosen dependency chain becomes invalid
and the packages will be removed.
jak-thinkpad:/home/jak/Desktop/dh-autoreconf# aptitude dist-upgrade
The following NEW packages will be installed:
cpp-4.4{a} dash{a} diffutils{a} g++-4.4{a} gcc-4.4{a} insserv{a} libc-bin{a}
libc-dev-bin{a} libdb4.7{a} libdb4.8{a} libdpkg-perl{a} liblzma2{a} libmpfr4{a}
libreadline6{a} libstdc++6-4.4-dev{a} python2.6{a} python2.6-minimal{a}
sensible-utils{a} xz-utils{a}
The following packages will be REMOVED:
libdb4.5{u} libxcb-xlib0{u} python2.5{u} python2.5-minimal{u}
The following packages will be upgraded:
bash binutils build-essential cpio cpp cpp-4.3 debianutils diff dpkg{b}
dpkg-dev e2fsprogs g++ g++-4.3 gcc gcc-4.3 gcc-4.3-base gnupg gpgv grep libc6
libc6-dev
libgdbm3 liblocale-gettext-perl libpam-modules libpam-runtime
libstdc++6-4.3-dev libtext-charwidth-perl libtext-iconv-perl libx11-6 libxcb1
perl perl-base
perl-modules python python-minimal readline-common sed sysv-rc util-linux
The following packages are RECOMMENDED but will NOT be installed:
bash-completion gnupg-curl libalgorithm-merge-perl libc6-i686 libldap-2.4-2
manpages-dev netbase
39 packages upgraded, 19 newly installed, 4 to remove and 0 not upgraded.
Need to get 63.8MB of archives. After unpacking 53.9MB will be used.
The following packages have unmet dependencies:
dpkg: Breaks: emacs21 (< 21.4a+1-5.7) but 21.4a+1-5.6 is installed.
The following actions will resolve these dependencies:
Remove the following packages:
1) emacs21
2) pyrex-mode
3) python-mode
Accept this solution? [Y/n/q/?] ^C
--
Julian Andres Klode - Debian Developer, Ubuntu Member
See http://wiki.debian.org/JulianAndresKlode and http://jak-linux.org/.
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