Public bug reported:
From https://askubuntu.com/q/1568495/1004020 .
> Why in the world would do-release-upgrade not simply say something
useful like "We really appreciate you trying to fix your issue 2 years
ago by upgrading to 24.10, BUT... You kind of hurt yourself there." OR..
"ERROR: You can't upgrade from 24.10 because you didn't do it within the
9 month timeframe. You should/need to install a fresh copy of a newer
version, and remember this lesson. Sorry."
# Actual behavior
```
root@aurora:~# sudo do-release-upgrade
Checking for a new Ubuntu release
Your Ubuntu release is not supported anymore.
For upgrade information, please visit:
http-/www.ubuntu.com/releaseendoflife
= Welcome to Ubuntu 26.04 LTS 'Resolute Raccoon' =
... Deleted Boilerplate info
Continue [yN] y
Get:1 Upgrade tool signature [833 B]
Get:2 Upgrade tool [958 kB]
Fetched 959 kB in 0s (0 B/s)
/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeFetcherCore.py:237:
Warning: W:Download is performed unsandboxed as root as file
'resolute.tar.gz.gpg' couldn't be accessed by user '_apt'. - pkgAcquire::Run
(13: Permission denied)
result = fetcher.run()
authenticate 'resolute.tar.gz' against 'resolute.tar.gz.gpg'
extracting 'resolute.tar.gz'
Reading cache
Distribution data outdated
Please ensure all package updates are installed, and then try again.
```
# Expected behavior
```
root@aurora:~# sudo do-release-upgrade
Checking for a new Ubuntu release
Your Ubuntu release is not supported anymore. Furthermore, upgrading from it
might not be supported either.
For upgrade information, please visit:
http-/www.ubuntu.com/releaseendoflife
= Welcome to Ubuntu 26.04 LTS 'Resolute Raccoon' =
... Deleted Boilerplate info
Continue [yN] y
Get:1 Upgrade tool signature [833 B]
Get:2 Upgrade tool [958 kB]
Fetched 959 kB in 0s (0 B/s)
/usr/lib/python3/dist-packages/DistUpgrade/DistUpgradeFetcherCore.py:237:
Warning: W:Download is performed unsandboxed as root as file
'resolute.tar.gz.gpg' couldn't be accessed by user '_apt'. - pkgAcquire::Run
(13: Permission denied)
result = fetcher.run()
authenticate 'resolute.tar.gz' against 'resolute.tar.gz.gpg'
extracting 'resolute.tar.gz'
Reading cache
Distribution data outdated
Please reinstall Ubuntu to upgrade. Do not try again with do-release-upgrade on
an outdated release.
```
** Affects: ubuntu-release-upgrader (Ubuntu)
Importance: Undecided
Status: New
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https://bugs.launchpad.net/bugs/2161383
Title:
Improve error for releases lacking upgrade paths
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