Dear Maintainer,

kthresher fails on systems (container) where the running kernel is
not installed:

  root@tranquility:/tmp/autopkgtest.wBbOzr/build.4Yl/src# kthresher
  INFO: No kernel packages available for autoremoval.
  root@tranquility:/tmp/autopkgtest.wBbOzr/build.4Yl/src# kthresher -d
  INFO: Attempting to read /etc/kthresher.conf.
  INFO: Options found: ['include'].
  INFO: Valid setting found "include"
  INFO:   include = /etc/kthresher.d/*.conf
  INFO: Options: {'dry_run': True, 'headers': False, 'keep': 1, 'purge': False, 'verbose': False, 'include': '/etc/kthresher.d/*.conf'}
  INFO: ----- DRY RUN -----
  Traceback (most recent call last):
    File "/usr/lib/python3/dist-packages/apt/cache.py", line 277, in __getitem__
      rawpkg = self._cache[key]
               ~~~~~~~~~~~^^^^^
  KeyError: 'linux-image-6.1.0-26-amd64'

  During handling of the above exception, another exception occurred:

  Traceback (most recent call last):
    File "/usr/bin/kthresher", line 33, in <module>
      sys.exit(load_entry_point('kthresher==1.4.1', 'console_scripts', 'kthresher')())
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/kthresher.py", line 475, in main
      kthreshing(purge=False, headers=options["headers"], keep=options["keep"])
    File "/usr/lib/python3/dist-packages/kthresher.py", line 266, in kthreshing
      kernel_pkg = apt_cache["linux-image-%s" % current_kernel_ver]
                   ~~~~~~~~~^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
    File "/usr/lib/python3/dist-packages/apt/cache.py", line 279, in __getitem__
      raise KeyError("The cache has no package named %r" % key)
  KeyError: "The cache has no package named 'linux-image-6.1.0-26-amd64'"
  root@tranquility:/tmp/autopkgtest.wBbOzr/build.4Yl/src# uname -a
  Linux tranquility 6.1.0-26-amd64 #1 SMP PREEMPT_DYNAMIC Debian 6.1.112-1 (2024-09-30) x86_64 GNU/Linux
  root@tranquility:/tmp/autopkgtest.wBbOzr/build.4Yl/src# dpkg -l | grep linux-image
  root@tranquility:/tmp/autopkgtest.wBbOzr/build.4Yl/src#

We enabled autopkgtest for this package and noticed this problem.

Yes, kthresher should handle this case, but I think this is a minor
issue for most systems where kthresher is used.

I will file a bug upstream and declare a autopkgtest restriction flaky
to prevent a RC bug for this.

Best,
 - Darsha

forwarded 1085517 https://github.com/rackerlabs/kthresher/issues/93
stop