Raring to saucy upgrade fails with "AttributeError: Values instance has no attribute 'devel_release'"

Raring to saucy upgrades fail with the following error on almost all the configurations (i386, amd64 and desktop, server).

extracting 'saucy.tar.gz'
Traceback (most recent call last):
  File "/tmp/ubuntu-release-upgrader-5isch8/saucy", line 10, in <module>
    sys.exit(main())
  File "/tmp/ubuntu-release-upgrader-5isch8/DistUpgrade/DistUpgradeMain.py", line 240, in main
    if app.run():
  File "/tmp/ubuntu-release-upgrader-5isch8/DistUpgrade/DistUpgradeController.py", line 1791, in run
    return self.fullUpgrade()
  File "/tmp/ubuntu-release-upgrader-5isch8/DistUpgrade/DistUpgradeController.py", line 1686, in fullUpgrade
    if not self.updateSourcesList():
  File "/tmp/ubuntu-release-upgrader-5isch8/DistUpgrade/DistUpgradeController.py", line 760, in updateSourcesList
    if not self.rewriteSourcesList(mirror_check=True):
  File "/tmp/ubuntu-release-upgrader-5isch8/DistUpgrade/DistUpgradeController.py", line 639, in rewriteSourcesList
    and self.options.devel_release == True and
AttributeError: Values instance has no attribute 'devel_release'

Steps to reproduce:
1. Install raring desktop/ server
2. Run do-release-upgrade -d to upgrade it to Saucy. Confirm upgrade and enter the password.
Now the above error could be seen. This happens even when you do "sudo apt-get update && sudo apt-get dist-upgrade" before running do-release-upgrade -d.

The same error is seen when I ran update-manage -d.
---
ApportVersion: 2.9.2-0ubuntu8.1
Architecture: i386
CrashDB: ubuntu
DistroRelease: Ubuntu 13.04
InstallationDate: Installed on 2013-07-11 (0 days ago)
InstallationMedia: Ubuntu 13.04 "Raring Ringtail" - Release i386 (20130424)
MarkForUpload: True
Package: ubuntu-release-upgrader (not installed)
ProcVersionSignature: Ubuntu 3.8.0-26.38-generic 3.8.13.2
Tags: raring dist-upgrade
Uname: Linux 3.8.0-26-generic i686
UpgradeStatus: Upgraded to raring on 2013-07-11 (0 days ago)
UserGroups: adm cdrom dip lpadmin plugdev sambashare sudo
VarLogDistupgradeAptlog:
 Log time: 2013-07-11 10:09:15.334300
 Log time: 2013-07-11 10:09:19.886449
VarLogDistupgradeTermlog: