I believe this bug affects me as well.
I see this:
jeff@starshine:~ $ apt-cache policy ubuntu-release-upgrader-gtk
ubuntu-release-upgrader-gtk:
Installed: 1:18.04.34
Candidate: 1:18.04.34
Version table:
*** 1:18.04.34 500
500 http://es.archive.ubuntu.com/ubuntu bionic-updates/main amd64
Packages
500 http://es.archive.ubuntu.com/ubuntu bionic-updates/main i386
Packages
100 /var/lib/dpkg/status
1:18.04.17 500
500 http://es.archive.ubuntu.com/ubuntu bionic/main amd64 Packages
500 http://es.archive.ubuntu.com/ubuntu bionic/main i386 Packages
jeff@starshine:~ $ DEBUG_UPDATE_MANAGER=1 do-release-upgrade
Checking for a new Ubuntu release
MetaRelease.__init__() useDevel=False useProposed=False
/etc/update-manager/meta-release: https://changelogs.ubuntu.com/meta-release
/etc/update-manager/meta-release:
https://changelogs.ubuntu.com/meta-release-lts
/etc/update-manager/meta-release: -development
/etc/update-manager/meta-release: -proposed
metarelease-uri: https://changelogs.ubuntu.com/meta-release
MetaRelease.download()
reading file '/home/jeff/.cache/update-manager-core/meta-release'
have self.metarelease_information
MetaRelease.parse()
current dist name: 'bionic'
found distro name: 'warty'
found distro name: 'hoary'
found distro name: 'breezy'
found distro name: 'dapper'
found distro name: 'edgy'
found distro name: 'feisty'
found distro name: 'gutsy'
found distro name: 'hardy'
found distro name: 'intrepid'
found distro name: 'jaunty'
found distro name: 'karmic'
found distro name: 'lucid'
found distro name: 'maverick'
found distro name: 'natty'
found distro name: 'oneiric'
found distro name: 'precise'
found distro name: 'quantal'
found distro name: 'raring'
found distro name: 'saucy'
found distro name: 'trusty'
found distro name: 'utopic'
found distro name: 'vivid'
found distro name: 'wily'
found distro name: 'xenial'
found distro name: 'yakkety'
found distro name: 'zesty'
found distro name: 'artful'
found distro name: 'bionic'
found distro name: 'cosmic'
found distro name: 'disco'
new dist: <UpdateManager.Core.MetaRelease.Dist object at 0x7fbe1e6a0ba8>
Please install all available updates for your release before upgrading.
1, jeff@starshine:~ $
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https://bugs.launchpad.net/bugs/1799319
Title:
Upgrade to 18.10 fails: Please install all available updates
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