Comment 4 for bug 637087

root@delan:~# sudo apt-get -o Debug::pkgProblemResolver=true dist-upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
Calculating upgrade... Starting
Starting 2
Investigating (0) libc6-dev [ amd64 ] < 2.12.1-0ubuntu4 -> 2.12.1-0ubuntu6 > ( libdevel )
Broken libc6-dev:amd64 Depends on libc6 [ amd64 ] < 2.12.1-0ubuntu4 -> 2.12.1-0ubuntu6 > ( libs ) (= 2.12.1-0ubuntu4)
  Considering libc6:amd64 11035 as a solution to libc6-dev:amd64 10025
  Re-Instated libc6:amd64
Broken libc6-dev:amd64 Depends on libc-dev-bin [ amd64 ] < 2.12.1-0ubuntu4 -> 2.12.1-0ubuntu6 > ( libdevel ) (= 2.12.1-0ubuntu4)
  Considering libc-dev-bin:amd64 11 as a solution to libc6-dev:amd64 10025
  Added libc-dev-bin:amd64 to the remove list
  Fixing libc6-dev:amd64 via keep of libc-dev-bin:amd64
 Try to Re-Instate (0) libc-dev-bin:amd64
Re-Instated libc-dev-bin:amd64 (1 vs 1)
Investigating (1) libc6-dev [ amd64 ] < 2.12.1-0ubuntu4 -> 2.12.1-0ubuntu6 > ( libdevel )
Broken libc6-dev:amd64 Depends on libc6 [ amd64 ] < 2.12.1-0ubuntu4 -> 2.12.1-0ubuntu6 > ( libs ) (= 2.12.1-0ubuntu4)
  Considering libc6:amd64 10025 as a solution to libc6-dev:amd64 10025
Broken libc6-dev:amd64 Depends on libc-dev-bin [ amd64 ] < 2.12.1-0ubuntu4 -> 2.12.1-0ubuntu6 > ( libdevel ) (= 2.12.1-0ubuntu4)
  Considering libc-dev-bin:amd64 11 as a solution to libc6-dev:amd64 10025
  Added libc-dev-bin:amd64 to the remove list
  Fixing libc6-dev:amd64 via keep of libc-dev-bin:amd64
Investigating (2) libc6-dev [ amd64 ] < 2.12.1-0ubuntu4 -> 2.12.1-0ubuntu6 > ( libdevel )
Broken libc6-dev:amd64 Depends on libc6 [ amd64 ] < 2.12.1-0ubuntu4 -> 2.12.1-0ubuntu6 > ( libs ) (= 2.12.1-0ubuntu4)
  Considering libc6:amd64 10025 as a solution to libc6-dev:amd64 10025
Done
Failed
The following packages have unmet dependencies:
 libc6-dev : Depends: libc6 (= 2.12.1-0ubuntu4) but 2.12.1-0ubuntu6 is to be installed
E: Unable to correct problems, you have held broken packages.