[Debian-med-packaging] Bug#639269: libvxl1-dev and libmcal0-dev: error when trying to install together

Thu Aug 25 13:24:13 UTC 2011

Package: libmcal0-dev,libvxl1-dev
Version: libmcal0-dev/0.06-17
Version: libvxl1-dev/1.14.0-8
Severity: serious
User: treinen at debian.org
Usertags: edos-file-overwrite

Date: 2011-08-25
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 libwrap0 libasound2 libasyncns0 libxau6 x11-common libice6 libsm6
  libxdmcp6 libxcb1 libx11-data libx11-6 libxt6 libaudio2 libdbus-1-3 libdrm2
  libogg0 libflac8 libexpat1 libfreetype6 ucf ttf-dejavu-core
  fontconfig-config libfontconfig1 libxfixes3 libxdamage1 libxext6 libxxf86vm1
  libgl1-mesa-glx libglu1-mesa libjpeg62 liblcms1 libmng1 libpng12-0
  libvorbis0a libvorbisenc2 libsndfile1 libx11-xcb1 libxrender1 libxft2 libxi6
  libxinerama1 libxv1 librtmp0 libcap2 fontconfig libavutil50
  libdirac-encoder0 libfaad2 libgsm1 libmp3lame0 libopenjpeg2 liborc-0.4-0
  libschroedinger-1.0-0 libspeex1 libtheora0 libva1 libvpx0 libx264-116
  libxvidcore4 libavcodec52 libavformat52 libjpeg8 libmad0 libcaca0 libsysfs2
  tsconf libts-0.0-0 libdirectfb-1.2-9 libxtst6 libpulse0 libsdl1.2debian
  libxxf86dga1 libavifile-0.7c2 libc-dev-bin linux-libc-dev libc6-dev
  libglib2.0-0 libmcal0 libmcal0-dev libqtcore4 libtiff4 libqtgui4
  libqt4-opengl libswscale0 proj-data libproj0 libgeotiff1.2 libvxl1.14
  libvxl1-dev

Extracting templates from packages: 33%
Extracting templates from packages: 66%
Extracting templates from packages: 100%
Preconfiguring packages ...
Authentication warning overridden.
Can not write log, openpty() failed (/dev/pts not mounted?)
Selecting previously deselected package libpcre3.
(Reading database ... 10663 files and directories currently installed.)
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Unpacking libwrap0 (from .../libwrap0_7.6.q-21_amd64.deb) ...
Selecting previously deselected package libasound2.
Unpacking libasound2 (from .../libasound2_1.0.24.1-3_amd64.deb) ...
Selecting previously deselected package libasyncns0.
Unpacking libasyncns0 (from .../libasyncns0_0.8-4_amd64.deb) ...
Selecting previously deselected package libxau6.
Unpacking libxau6 (from .../libxau6_1%3a1.0.6-3_amd64.deb) ...
Selecting previously deselected package x11-common.
Unpacking x11-common (from .../x11-common_1%3a7.6+8_all.deb) ...
Selecting previously deselected package libice6.
Unpacking libice6 (from .../libice6_2%3a1.0.7-2_amd64.deb) ...
Selecting previously deselected package libsm6.
Unpacking libsm6 (from .../libsm6_2%3a1.2.0-2_amd64.deb) ...
Selecting previously deselected package libxdmcp6.
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Selecting previously deselected package libxcb1.
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Selecting previously deselected package libx11-data.
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Selecting previously deselected package libxt6.
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Selecting previously deselected package libaudio2.
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Selecting previously deselected package libdbus-1-3.
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Selecting previously deselected package libdrm2.
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Selecting previously deselected package libogg0.
Unpacking libogg0 (from .../libogg0_1.2.2~dfsg-1_amd64.deb) ...
Selecting previously deselected package libflac8.
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Selecting previously deselected package libexpat1.
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Selecting previously deselected package libfreetype6.
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Moving old data out of the way
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Selecting previously deselected package libxdamage1.
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Selecting previously deselected package libxext6.
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Selecting previously deselected package libxxf86vm1.
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Selecting previously deselected package libx11-xcb1.
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Selecting previously deselected package libxft2.
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Selecting previously deselected package librtmp0.
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Selecting previously deselected package libcap2.
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Selecting previously deselected package libdirac-encoder0.
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Selecting previously deselected package libfaad2.
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Selecting previously deselected package libgsm1.
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Selecting previously deselected package libopenjpeg2.
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Selecting previously deselected package libjpeg8.
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Selecting previously deselected package libmad0.
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dpkg: error processing /var/cache/apt/archives/libvxl1-dev_1.14.0-8_amd64.deb (--unpack):
 trying to overwrite '/usr/lib/libmcal.so', which is also in package libmcal0-dev 0.6-17
configured to not write apport reports
Processing triggers for man-db ...
Errors were encountered while processing:
 /var/cache/apt/archives/libvxl1-dev_1.14.0-8_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/libmcal.so

This bug is assigned to both packages. If you, the maintainers of
the two packages in question, have agreed on which of the packages will
resolve the problem please reassign the bug to that package. You may
also register in the BTS that the other package is affected by the bug.

-Ralf.

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