[Bug 2058227] Re: Crash during upgrade from Mantic to Noble due to Python 3.12

[Saurabh Minni]

That is weird, when I try release upgrade it shows the following. Its a

```
$ sudo do-release-upgrade -m desktop
Checking for a new Ubuntu release
No new release found.
```


I am on  Mantic right now

```
$ cat /etc/os-release 
PRETTY_NAME="Ubuntu 23.10"
NAME="Ubuntu"
VERSION_ID="23.10"
VERSION="23.10 (Mantic Minotaur)"
VERSION_CODENAME=mantic
ID=ubuntu
ID_LIKE=debian
HOME_URL="https://www.ubuntu.com/"
SUPPORT_URL="https://help.ubuntu.com/"
BUG_REPORT_URL="https://bugs.launchpad.net/ubuntu/"
PRIVACY_POLICY_URL="https://www.ubuntu.com/legal/terms-and-policies/privacy-policy"
UBUNTU_CODENAME=mantic
LOGO=ubuntu-logo
```

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https://bugs.launchpad.net/bugs/2058227

Title:
  Crash during upgrade from Mantic to Noble due to Python 3.12

Status in apt-xapian-index package in Ubuntu:
  Confirmed
Status in ubuntu-release-upgrader package in Ubuntu:
  Fix Released

Bug description:
  Upgrading from Mantic to Noble often triggers a crash related to Python 3.12 compatibility:
  ```
  Traceback (most recent call last):
    File "/usr/sbin/update-apt-xapian-index", line 66, in <module>
      import axi.indexer
    File "/usr/lib/python3/dist-packages/axi/indexer.py", line 27, in <module>
      import imp
  ModuleNotFoundError: No module named 'imp'
  ```

  I guess that the crash happens when the indexer code is called while
  still being in the Mantic version, but the default Python3 package has
  already been upgraded to 3.12. However, that situation doesn't happen
  all the time, and the upgrade is sometimes able to complete without
  crash.

  For some reasons, I mostly (only?) see this on Kubuntu upgrades.

  Maybe that situation could also happen while upgrading from Jammy, but
  as the upgrade is currently broken due to some other issues, I haven't
  seen it yet.

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