Bug#714091: libsasl2-3: Unable to install libsasl2-3, same file in 2-2

[Mahesh T. Pai]

Package: libsasl2-3
Version: 2.1.26
Severity: normal

Dear Maintainer,

libsasl2-3 is uninstallable. After noticing some errors on running 
'aptitude -t experimental upgrade' I ran 'aptitude -f install' to find
these errors:-
<quote>

The following NEW packages will be installed:
  libsasl2-3{a} 
The following partially installed packages will be configured:
  libsasl2-modules 
0 packages upgraded, 1 newly installed, 0 to remove and 8 not upgraded.
Need to get 0 B/121 kB of archives. After unpacking 241 kB will be used.
Do you want to continue? [Y/n/?] 
(Reading database ... 162676 files and directories currently installed.)
Unpacking libsasl2-3:amd64 (from .../libsasl2-3_2.1.26.dfsg1-2_amd64.deb) ...
dpkg: error processing /var/cache/apt/archives/libsasl2-3_2.1.26.dfsg1-2_amd64.deb (--unpack):
 trying to overwrite '/usr/lib/x86_64-linux-gnu/sasl2/libsasldb.so', which is also in package libsasl2-2:amd64 2.1.25.dfsg1-8
Errors were encountered while processing:
 /var/cache/apt/archives/libsasl2-3_2.1.26.dfsg1-2_amd64.deb
E: Sub-process /usr/bin/dpkg returned an error code (1)
A package failed to install.  Trying to recover:
dpkg: dependency problems prevent configuration of libsasl2-modules:amd64:
 libsasl2-modules:amd64 depends on libsasl2-3 (= 2.1.26.dfsg1-2); however:
  Package libsasl2-3:amd64 is not installed.

dpkg: error processing libsasl2-modules:amd64 (--configure):
 dependency problems - leaving unconfigured
Errors were encountered while processing:
 libsasl2-modules:amd64
               

</ quote>


   * What led up to the situation?
   * What exactly did you do (or not do) that was effective (or
     ineffective)?
   * What was the outcome of this action?
   * What outcome did you expect instead?

*** End of the template - remove these lines ***

You may ignore the first line - I tries quite a few things, 
(eg:- " .... install libsasl2-3" and removing libsasl2-2, etc; 
one of the dependency resolving solutions was to retain libsasl2-2 
and install 2-3; but of course, that will not work. 

I upgrade (experimental), as frequently as twice a week. 


-- System Information:
Debian Release: jessie/sid
  APT prefers unstable
  APT policy: (500, 'unstable'), (500, 'testing'), (1, 'experimental')
Architecture: amd64 (x86_64)

Kernel: Linux 3.10-rc5-amd64 (SMP w/1 CPU core)
Locale: LANG=en_IN, LC_CTYPE=en_IN (charmap=UTF-8)
Shell: /bin/sh linked to /bin/dash