Package: libept1.4.16,libept1.5.0
Version: libept1.4.16/1.0.14+b2
Version: libept1.5.0/1.1+nmu2
Severity: serious
User: trei...@debian.org
Usertags: edos-file-overwrite

Date: 2015-11-28
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:


Selecting previously unselected package gcc-5-base:amd64.
(Reading database ... 10925 files and directories currently installed.)
Preparing to unpack .../gcc-5-base_5.2.1-26_amd64.deb ...
Unpacking gcc-5-base:amd64 (5.2.1-26) ...
Setting up gcc-5-base:amd64 (5.2.1-26) ...
(Reading database ... 10932 files and directories currently installed.)
Preparing to unpack .../libstdc++6_5.2.1-26_amd64.deb ...
Unpacking libstdc++6:amd64 (5.2.1-26) over (4.8.2-19) ...
Processing triggers for libc-bin (2.19-22) ...
Setting up libstdc++6:amd64 (5.2.1-26) ...
Processing triggers for libc-bin (2.19-22) ...
(Reading database ... 10946 files and directories currently installed.)
Preparing to unpack .../archives/apt_1.1.1_amd64.deb ...
Unpacking apt (1.1.1) over (1.0.4) ...
Selecting previously unselected package libapt-pkg5.0:amd64.
Preparing to unpack .../libapt-pkg5.0_1.1.1_amd64.deb ...
Unpacking libapt-pkg5.0:amd64 (1.1.1) ...
Processing triggers for libc-bin (2.19-22) ...
Processing triggers for man-db (2.7.5-1) ...
Setting up libapt-pkg5.0:amd64 (1.1.1) ...
Processing triggers for libc-bin (2.19-22) ...
(Reading database ... 10979 files and directories currently installed.)
Preparing to unpack .../aptitude_0.7.4-2_amd64.deb ...
Unpacking aptitude (0.7.4-2) over (0.6.10-1) ...
Preparing to unpack .../aptitude-common_0.7.4-2_all.deb ...
Unpacking aptitude-common (0.7.4-2) over (0.6.10-1) ...
Selecting previously unselected package libboost-iostreams1.58.0:amd64.
Preparing to unpack .../libboost-iostreams1.58.0_1.58.0+dfsg-4_amd64.deb ...
Unpacking libboost-iostreams1.58.0:amd64 (1.58.0+dfsg-4) ...
Processing triggers for man-db (2.7.5-1) ...
Processing triggers for libc-bin (2.19-22) ...
(Reading database ... 10977 files and directories currently installed.)
Removing libcwidget3:amd64 (0.5.17-1) ...
Removing libsigc++-2.0-0c2a:amd64 (2.4.1-1) ...
Processing triggers for libc-bin (2.19-22) ...
Selecting previously unselected package libsigc++-2.0-0v5:amd64.
(Reading database ... 10924 files and directories currently installed.)
Preparing to unpack .../libsigc++-2.0-0v5_2.6.2-1_amd64.deb ...
Unpacking libsigc++-2.0-0v5:amd64 (2.6.2-1) ...
Selecting previously unselected package libcwidget3v5:amd64.
Preparing to unpack .../libcwidget3v5_0.5.17-4_amd64.deb ...
Unpacking libcwidget3v5:amd64 (0.5.17-4) ...
Processing triggers for libc-bin (2.19-22) ...
(Reading database ... 10977 files and directories currently installed.)
Removing libept1.4.12:amd64 (1.0.12) ...
Removing libxapian22 (1.2.17-1) ...
Processing triggers for libc-bin (2.19-22) ...
Selecting previously unselected package libxapian22v5.
(Reading database ... 10964 files and directories currently installed.)
Preparing to unpack .../libxapian22v5_1.2.21-1.2_amd64.deb ...
Unpacking libxapian22v5 (1.2.21-1.2) ...
Selecting previously unselected package libept1.4.16:amd64.
Preparing to unpack .../libept1.4.16_1.0.14+b2_amd64.deb ...
Unpacking libept1.4.16:amd64 (1.0.14+b2) ...
Selecting previously unselected package libept1.5.0:amd64.
Preparing to unpack .../libept1.5.0_1.1+nmu2_amd64.deb ...
Unpacking libept1.5.0:amd64 (1.1+nmu2) ...
dpkg: error processing archive 
/var/cache/apt/archives/libept1.5.0_1.1+nmu2_amd64.deb (--unpack):
 trying to overwrite '/usr/lib/x86_64-linux-gnu/libept.so.1.aptpkg5.0', which 
is also in package libept1.4.16:amd64 1.0.14+b2
Processing triggers for libc-bin (2.19-22) ...
Errors were encountered while processing:
 /var/cache/apt/archives/libept1.5.0_1.1+nmu2_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/x86_64-linux-gnu/libept.so.1.aptpkg5.0

This bug has been filed against 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 then
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://qa.debian.org/dose/file-overwrites.html.

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