Description of problem:
The man page suggests that tracer could report processes for certain users with -e/-r/-u. However, after downgrading procps-ng, logging in from virtual console and running top as "testuser", and upgrading procps-ng all the following produce the same report when running as root:

1. tracer -e
2. tracer -r
3. tracer -u nosuchuser

Either these should be fixed or the man page should be updated to better explain what these options are about. Regardless, the last case should probably cause an error due to invalid/unknown user specified.

The mutually exclusive option gives an exception, not sure is this related or not but should also be fixed:

1. tracer --erased
   Traceback (most recent call last):
   File "/usr/bin/tracer", line 34, in <module>
   tracer.main.run()
   File "/usr/lib/python3.9/site-packages/tracer/main.py", line 45, in run
   return router.dispatch()
   File "/usr/lib/python3.9/site-packages/tracer/resources/router.py", line 52, in dispatch
   controller = DefaultController(self.args, self.packages)
   File "/usr/lib/python3.9/site-packages/tracer/controllers/default.py", line 62, in _init_
   self.applications = self.tracer.trace_affected(self._user(args.user))
   File "/usr/lib/python3.9/site-packages/tracer/resources/tracer.py", line 117, in trace_affected
   if self._erased and not self._PACKAGE_MANAGER.provided_by(a.name):
   File "/usr/lib/python3.9/site-packages/tracer/resources/PackageManager.py", line 63, in provided_by
   return self.package_managers[0].provided_by(app)
   File "/usr/lib/python3.9/site-packages/tracer/packageManagers/rpm.py", line 162, in provided_by
   process = app.instances[0] # @TODO Reimplement for all processes
   AttributeError: 'str' object has no attribute 'instances'

Version-Release number of selected component (if applicable):
python3-tracer-0.7.5-4.el9.noarch