can not upgrade to 13.10, at least would be good to now what is wrong

[Dmitry Batiievskyi]

Update crashed with non-informative error message which doesn't helps to identify the problem
It should tell about problem packages or at least show where log files with errors are, but id does nothing

ProblemType: Bug
DistroRelease: Ubuntu 13.04
Package: ubuntu-release-upgrader-core 1:0.192.13
ProcVersionSignature: Ubuntu 3.8.0-31.46-generic 3.8.13.8
Uname: Linux 3.8.0-31-generic x86_64
ApportVersion: 2.9.2-0ubuntu8.3
Architecture: amd64
CrashDB: ubuntu
Date: Thu Oct 24 10:13:38 2013
InstallationDate: Installed on 2013-02-28 (237 days ago)
InstallationMedia: Ubuntu 12.10 "Quantal Quetzal" - Release amd64 (20121017.5)
MarkForUpload: True
PackageArchitecture: all
SourcePackage: ubuntu-release-upgrader
UpgradeStatus: Upgraded to raring on 2013-10-24 (0 days ago)

[Brian Murray (brian-murray)]

Looking at main.log we can see:

2013-10-24 10:12:44,620 DEBUG Marking 'ubuntu-desktop' for upgrade
2013-10-24 10:12:44,772 DEBUG blacklist expr '^postgresql-.*[0-9]\.[0-9].*' matches 'postgresql-9.2'
2013-10-24 10:12:44,772 DEBUG The package 'postgresql-9.2' is marked for removal but it's in the removal blacklist
2013-10-24 10:12:44,784 ERROR Dist-upgrade failed: 'The package 'postgresql-9.2' is marked for removal but it is in the removal blacklist.'

postgresql-9.2 is currently not available in Ubuntu so the package would be removed by the upgrade process, rather than remove it we prevent the upgrade so that you will not lose access to your database.

[Dmitry Batiievskyi (0rc)]

Yes I can see that, but the thing is that this problem package is not listed in do-release-upgrade error output neither in GUI updater error report
There are a lots of users who don't know how and where to find a log, and there is no information where the log is found in error output also