Re: Bug#887629: libc6: bad upgrade path: libexpat1 unpacked and python3 called before libc6 unpacked
On Thu, Jan 18, 2018 at 06:41:52PM +0100, Aurelien Jarno wrote:
> control: reassign -1 apt,dpkg
> control: affects -1 libc6
> control: affects -1 libexpat1
>
> On 2018-01-18 15:53, Andreas Beckmann wrote:
> > Package: libc6
> > Version: 2.26-2
> > Severity: serious
> > User: debian-qa@lists.debian.org
> > Usertags: piuparts
> >
> > Hi,
> >
> > during a test with piuparts I noticed your package fails to upgrade from
> > 'stretch'.
> > It installed fine in 'stretch', then the upgrade to 'buster' fails.
> >
> > >From the attached log (scroll to the bottom...):
> >
> > [...]
> > Preparing to unpack .../libexpat1-dev_2.2.5-3_i386.deb ...
> > Unpacking libexpat1-dev:i386 (2.2.5-3) over (2.2.0-2+deb9u1) ...
> > Preparing to unpack .../libexpat1_2.2.5-3_i386.deb ...
> > Unpacking libexpat1:i386 (2.2.5-3) over (2.2.0-2+deb9u1) ...
>
> $ apt-cache show libexpat1
> Package: libexpat1
> Source: expat
> Version: 2.2.5-3
> Installed-Size: 429
> Maintainer: Laszlo Boszormenyi (GCS) <gcs@debian.org>
> Architecture: i386
> Depends: libc6 (>= 2.25)
>
> So libexpat1 correctly depends on libc6 (>= 2.25), which is not
> even unpacked at that point.
>
> > [...]
> > Preparing to unpack .../3-libglib2.0-dev_2.54.3-1_i386.deb ...
> > /usr/bin/python3: /lib/i386-linux-gnu/libc.so.6: version `GLIBC_2.25' not found (required by /lib/i386-linux-gnu/libexpat.so.1)
> > dpkg: warning: subprocess old pre-removal script returned error exit status 1
> > dpkg: trying script from the new package instead ...
> > dpkg: error processing archive /tmp/apt-dpkg-install-wfemKS/3-libglib2.0-dev_2.54.3-1_i386.deb (--unpack):
> > there is no script in the new version of the package - giving up
> > /usr/bin/python3: /lib/i386-linux-gnu/libc.so.6: version `GLIBC_2.25' not found (required by /lib/i386-linux-gnu/libexpat.so.1)
>
> This failure is normal given libexpat1 requires the new libc which has
> not been unpacked yet.
Yeah, well, it needs to Pre-Depend on it then I guess, if it's being used
in preinst actions. The thing is that Depends only after postinst ordering,
not unpack ordering.
>
> > dpkg: error while cleaning up:
> > subprocess installed post-installation script returned error exit status 1
> > [...]
> > Preparing to unpack .../9-libc6_2.26-2_i386.deb ...
> > Unpacking libc6:i386 (2.26-2) over (2.24-11+deb9u1) ...
> > Errors were encountered while processing:
> > /tmp/apt-dpkg-install-wfemKS/3-libglib2.0-dev_2.54.3-1_i386.deb
>
> And libc6 2.26-2 is only unpacked afterwards.
does not matter.
--
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