Package: libzorp-dev,libzorp3.9
Version: libzorp-dev/3.9.5-2
Version: libzorp3.9/3.9.5-2
Severity: serious
User: trei...@debian.org
Usertags: edos-file-overwrite

Date: 2012-03-23
Architecture: amd64
Distribution: sid

Hi,

automatic installation tests of packages that share a file and at the
same time do not conflict by their package dependency relationships has
detected the following problem:


WARNING: The following packages cannot be authenticated!
  libpcre3 libexpat1 libffi5 libglib2.0-0 libdb4.8 libcap2 mime-support
  python2.7-minimal python2.7 python-minimal python libc-dev-bin
  linux-libc-dev libc6-dev libcap-dev libexpat1-dev libglib2.0-data
  libglib2.0-bin pkg-config zlib1g-dev libglib2.0-dev libpython2.7 libssl-dev
  python2.7-dev python-dev libzorpll3.9-1 libzorpll-dev libzorp3.9 libzorp-dev
Preconfiguring packages ...
Authentication warning overridden.
Can not write log, openpty() failed (/dev/pts not mounted?)
Selecting previously unselected package libpcre3:amd64.
(Reading database ... 10565 files and directories currently installed.)
Unpacking libpcre3:amd64 (from .../libpcre3_8.30..-3_amd64.deb) ...
Selecting previously unselected package libexpat1:amd64.
Unpacking libexpat1:amd64 (from .../libexpat1_2.1.0~beta3-1_amd64.deb) ...
Selecting previously unselected package libffi5:amd64.
Unpacking libffi5:amd64 (from .../libffi5_3.0.10-3_amd64.deb) ...
Selecting previously unselected package libglib2.0-0:amd64.
Unpacking libglib2.0-0:amd64 (from .../libglib2.0-0_2.30.2-6_amd64.deb) ...
Selecting previously unselected package libdb4.8:amd64.
Unpacking libdb4.8:amd64 (from .../libdb4.8_4.8.30-11_amd64.deb) ...
Selecting previously unselected package libcap2.
Unpacking libcap2 (from .../libcap2_1%3a2.22-1_amd64.deb) ...
Selecting previously unselected package mime-support.
Unpacking mime-support (from .../mime-support_3.52-1_all.deb) ...
Selecting previously unselected package python2.7-minimal.
Unpacking python2.7-minimal (from .../python2.7-minimal_2.7.3~rc2-1_amd64.deb) 
...
Selecting previously unselected package python2.7.
Unpacking python2.7 (from .../python2.7_2.7.3~rc2-1_amd64.deb) ...
Selecting previously unselected package python-minimal.
Unpacking python-minimal (from .../python-minimal_2.7.2-10_all.deb) ...
Selecting previously unselected package python.
Unpacking python (from .../python_2.7.2-10_all.deb) ...
Selecting previously unselected package libc-dev-bin.
Unpacking libc-dev-bin (from .../libc-dev-bin_2.13-27_amd64.deb) ...
Selecting previously unselected package linux-libc-dev:amd64.
Unpacking linux-libc-dev:amd64 (from .../linux-libc-dev_3.2.12-1_amd64.deb) ...
Selecting previously unselected package libc6-dev.
Unpacking libc6-dev (from .../libc6-dev_2.13-27_amd64.deb) ...
Selecting previously unselected package libcap-dev.
Unpacking libcap-dev (from .../libcap-dev_1%3a2.22-1_amd64.deb) ...
Selecting previously unselected package libexpat1-dev.
Unpacking libexpat1-dev (from .../libexpat1-dev_2.1.0~beta3-1_amd64.deb) ...
Selecting previously unselected package libglib2.0-data.
Unpacking libglib2.0-data (from .../libglib2.0-data_2.30.2-6_all.deb) ...
Selecting previously unselected package libglib2.0-bin.
Unpacking libglib2.0-bin (from .../libglib2.0-bin_2.30.2-6_amd64.deb) ...
Selecting previously unselected package pkg-config.
Unpacking pkg-config (from .../pkg-config_0.26-1_amd64.deb) ...
Selecting previously unselected package zlib1g-dev:amd64.
Unpacking zlib1g-dev:amd64 (from .../zlib1g-dev_1%3a1.2.6.dfsg-2_amd64.deb) ...
Selecting previously unselected package libglib2.0-dev.
Unpacking libglib2.0-dev (from .../libglib2.0-dev_2.30.2-6_amd64.deb) ...
Selecting previously unselected package libpython2.7.
Unpacking libpython2.7 (from .../libpython2.7_2.7.3~rc2-1_amd64.deb) ...
Selecting previously unselected package libssl-dev.
Unpacking libssl-dev (from .../libssl-dev_1.0.1-2_amd64.deb) ...
Selecting previously unselected package python2.7-dev.
Unpacking python2.7-dev (from .../python2.7-dev_2.7.3~rc2-1_amd64.deb) ...
Selecting previously unselected package python-dev.
Unpacking python-dev (from .../python-dev_2.7.2-10_all.deb) ...
Selecting previously unselected package libzorpll3.9-1.
Unpacking libzorpll3.9-1 (from .../libzorpll3.9-1_3.9.1.3-1_amd64.deb) ...
Selecting previously unselected package libzorpll-dev.
Unpacking libzorpll-dev (from .../libzorpll-dev_3.9.1.3-1_amd64.deb) ...
Selecting previously unselected package libzorp3.9.
Unpacking libzorp3.9 (from .../libzorp3.9_3.9.5-2_amd64.deb) ...
Selecting previously unselected package libzorp-dev.
Unpacking libzorp-dev (from .../libzorp-dev_3.9.5-2_amd64.deb) ...
dpkg: error processing /var/cache/apt/archives/libzorp-dev_3.9.5-2_amd64.deb 
(--unpack):
 trying to overwrite '/usr/lib/libzorp.so', which is also in package libzorp3.9 
3.9.5-2
configured to not write apport reports
Processing triggers for man-db ...
Errors were encountered while processing:
 /var/cache/apt/archives/libzorp-dev_3.9.5-2_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)


This is a serious bug as it makes installation fail, and violates
sections 7.6.1 and 10.1 of the policy. An optimal solution would
consist in only one of the packages installing that file, and renaming
or removing the file in the other package. Depending on the
circumstances you might also consider Replace relations or file
diversions. If the conflicting situation cannot be resolved then, as a
last resort, the two packages have to declare a mutual
Conflict. Please take into account that Replaces, Conflicts and
diversions should only be used when packages provide different
implementations for the same functionality.

Here is a list of files that are known to be shared by both packages
(according to the Contents file for sid/amd64, which may be
slightly out of sync):

  /usr/lib/libzorp.so
  /usr/lib/libzorpproxy.so

-Ralf.

PS: for more information about the detection of file overwrite errors
of this kind see http://edos.debian.net/file-overwrites/.



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