Comment 33 for bug 146864

Michael, I don't know if this is the same issue as what opened the thread, but I got similar output to you after a Ctrl-C.

"foo"
^C
Sorry, command-not-found has crashed! Please file a bug report at:
https://bugs.launchpad.net/command-not-found/+filebug
Please include the following information with the report:

command-not-found version: 0.3
Python version: 3.6.9 final 0
Distributor ID: Ubuntu
Description: Ubuntu 18.04.4 LTS
Release: 18.04
Codename: bionic
Exception information:

[Errno 3] No such process
Traceback (most recent call last):
  File "/usr/lib/python3.6/subprocess.py", line 425, in run
    stdout, stderr = process.communicate(input, timeout=timeout)
  File "/usr/lib/python3.6/subprocess.py", line 855, in communicate
    self.wait()
  File "/usr/lib/python3.6/subprocess.py", line 1477, in wait
    (pid, sts) = self._try_wait(0)
  File "/usr/lib/python3.6/subprocess.py", line 1424, in _try_wait
    (pid, sts) = os.waitpid(self.pid, wait_flags)
KeyboardInterrupt

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/lib/python3/dist-packages/CommandNotFound/util.py", line 23, in crash_guard
    callback()
  File "/usr/lib/command-not-found", line 90, in main
    if not cnf.advise(args[0], options.ignore_installed) and not options.no_failure_msg:
  File "/usr/lib/python3/dist-packages/CommandNotFound/CommandNotFound.py", line 353, in advise
    snaps, mispell_snaps = self.get_snaps(command)
  File "/usr/lib/python3/dist-packages/CommandNotFound/CommandNotFound.py", line 113, in get_snaps
    universal_newlines=True)
  File "/usr/lib/python3.6/subprocess.py", line 356, in check_output
    **kwargs).stdout
  File "/usr/lib/python3.6/subprocess.py", line 432, in run
    process.kill()
  File "/usr/lib/python3.6/subprocess.py", line 1610, in kill
    self.send_signal(signal.SIGKILL)
  File "/usr/lib/python3.6/subprocess.py", line 1600, in send_signal
    os.kill(self.pid, sig)
ProcessLookupError: [Errno 3] No such process