Bug#680626: Squeeze->Wheezy: dist-upgrade fails, /usr/bin/python unable to load libssl.so.1.0.0

[Raphael Hertzog <hertzog@debian.org>]

Hello,

On Sun, 05 Aug 2012, Robert Luberda wrote:
> > Processing triggers for doc-base ...
> > /usr/bin/perl: symbol lookup error: /usr/lib/perl5/auto/UUID/UUID.so: undefined symbol: Perl_xs_apiversion_bootcheck
> > dpkg: error processing doc-base (--unpack):
> >  subprocess installed post-installation script returned error exit status 127
> 
> This has been already reported as #673913. But to be honest I have no
> idea what to do with this bug. From doc-base point of view it has been
> fixed in doc-base 0.10.3, but you are still running 0.9.5.
> 
> I believe the doc-base trigger was activated because some package
> providing /usr/share/doc-base file was upgraded during the dpkg run,
> and the doc-base trigger failed because system was not in consistent
> state. I've just learn about `interest-noawait' flag. Would using the
> flag in doc-base's triggers file help? Probably not, because still the
> flag won't be available in doc-base 0.9.5.

It won't help for this upgrade. But it might help for the next one
between wheezy and jessie. So it might still be a good idea to switch
to interest-noawait for packages like doc-base and man-db which trigger
for many packages.

> So maybe making libuuuid-perl to conflict with doc-base << 0.10.3 as
> suggested in  #652638 will be a better idea? Honestly, I don't know.

That would be a klumsy work-around.

Another thing that we should be considering is changing APT's default
to avoid running the triggers so often. I filed
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=626599 some time ago
but it's not been activated yet :-(

I did a test-upgrade this weekend on my laptop's wife and I enabled
those APT's options:
DPkg::NoTriggers "true";
PackageManager::Configure "smart";
DPkg::ConfigurePending "true";
DPkg::TriggersPending "true";

And the upgrade went fine. I clearly saw the part of the upgrade where
libuuid-perl was unpacked before perl-base but no doc-base trigger was
activated in between IIRC.

Cheers,
-- 
Raphaël Hertzog ◈ Debian Developer

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