** Description changed:

+ update-notifier-common depends on update-manager-core and update-
+ notifier depends on update-manager | update-manager-gnome. However,
+ calling "backend_helper.py show_updates" from update-notifier-common
+ will crash w/o update-manager.
+ 
+ (focal-amd64)root@impulse:/home/bdmurray/tmp# /usr/bin/python3 
/usr/lib/update-notifier/backend_helper.py show_updates
+ Traceback (most recent call last):
+   File "/usr/lib/update-notifier/backend_helper.py", line 166, in <module>
+     res = f(**f_kwargs)
+   File "/usr/lib/update-notifier/backend_helper.py", line 22, in show_updates
+     res = subprocess.call(cmd)
+   File "/usr/lib/python3.8/subprocess.py", line 340, in call
+     with Popen(*popenargs, **kwargs) as p:
+   File "/usr/lib/python3.8/subprocess.py", line 854, in __init__
+     self._execute_child(args, executable, preexec_fn, close_fds,
+   File "/usr/lib/python3.8/subprocess.py", line 1702, in _execute_child
+     raise child_exception_type(errno_num, err_msg, err_filename)
+ FileNotFoundError: [Errno 2] No such file or directory: 'update-manager'
+ 
+ [Errors Bucket]
  The Ubuntu Error Tracker has been receiving reports about a problem regarding 
update-notifier.  This problem was most recently seen with package version 
3.192.36, the problem page at 
https://errors.ubuntu.com/problem/0d32a54a459e849834245732febb0b408adddecc 
contains more details, including versions of packages affected, stacktrace or 
traceback, and individual crash reports.
  If you do not have access to the Ubuntu Error Tracker and are a software 
developer, you can request it at http://forms.canonical.com/reports/.

** Tags added: rls-ii-incoming

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https://bugs.launchpad.net/bugs/1927994

Title:
  /usr/lib/update-notifier/backend_helper.py:FileNotFoundError:/usr/lib
  /update-
  notifier/backend_helper.py@166:show_updates:call:__init__:_execute_child

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