Comment 6 for bug 901638

When I use dist-upgrade instead of do-release-upgrade, I get:

The following packages have unmet dependencies:
 odbcinst1debian2 : Breaks: tdsodbc (< 0.82-8) but 0.82-7 is to be installed
E: Error, pkgProblemResolver::Resolve generated breaks, this may be caused by held packages.

With debugging on, I see

Investigating (0) tdsodbc [ amd64 ] < 0.82-7 -> 0.91-1 > ( libs )
Broken tdsodbc:amd64 Breaks on libiodbc2 [ amd64 ] < 3.52.7-2 > ( libs )
  Considering libiodbc2:amd64 1 as a solution to tdsodbc:amd64 0
  Holding Back tdsodbc:amd64 rather than change libiodbc2:amd64
[...]
Investigating (1) odbcinst1debian2 [ amd64 ] < 2.2.14p2-2ubuntu1 -> 2.2.14p2-5 > ( libs )
Broken odbcinst1debian2:amd64 Breaks on tdsodbc [ amd64 ] < 0.82-7 -> 0.91-1 > ( libs ) (< 0.82-8)
  Considering tdsodbc:amd64 0 as a solution to odbcinst1debian2:amd64 3
  Upgrading tdsodbc:amd64 due to Breaks field in odbcinst1debian2:amd64
Investigating (1) tdsodbc [ amd64 ] < 0.82-7 -> 0.91-1 > ( libs )
Broken tdsodbc:amd64 Breaks on libiodbc2 [ amd64 ] < 3.52.7-2 > ( libs )
  Considering libiodbc2:amd64 1 as a solution to tdsodbc:amd64 0
  Holding Back tdsodbc:amd64 rather than change libiodbc2:amd64
Investigating (2) odbcinst1debian2 [ amd64 ] < 2.2.14p2-2ubuntu1 -> 2.2.14p2-5 > ( libs )
Broken odbcinst1debian2:amd64 Breaks on tdsodbc [ amd64 ] < 0.82-7 -> 0.91-1 > ( libs ) (< 0.82-8)
  Considering tdsodbc:amd64 0 as a solution to odbcinst1debian2:amd64 3
  Upgrading tdsodbc:amd64 due to Breaks field in odbcinst1debian2:amd64
Investigating (2) tdsodbc [ amd64 ] < 0.82-7 -> 0.91-1 > ( libs )
Broken tdsodbc:amd64 Breaks on libiodbc2 [ amd64 ] < 3.52.7-2 > ( libs )
  Considering libiodbc2:amd64 1 as a solution to tdsodbc:amd64 0
  Holding Back tdsodbc:amd64 rather than change libiodbc2:amd64

and so on, until Investigating(9) with the same output where it apparently stops trying.