Bug#28817: dpkg takes no care over libdpkg

[Ian Jackson <ian@chiark.greenend.org.uk>]

Package: dpkg
Version: 1.4.1
Severity: important

dpkg is linked against its own libdpkg.so.0.

However, libdpkg does not have (by design) a stable ABI, and wasn't
originally intended as a shared library.  Furthermore, the dpkg
package takes no special care to ensure that the version of dpkg
installed corresponds to the version of the shared library at every
point during a dpkg upgrade.

This means that under some circumstances the library and binary could
get out of step, making dpkg unuseable.

Ian.