...
  File "/home/cb/apparmor/HEAD-CLEAN/utils/apparmor/severity.py", line 147, in handle_variable_rank
      variable = regex_variable.search(resource).groups()[0]
	  AttributeError: 'NoneType' object has no attribute 'groups'

handle_variable_rank() checked with   if '@' in resource:
and if it finds it, expects it can match a variable, which means   @{.....}
If a filename contains a   @   this fails.

The patch fixes the if condition so that it does a regex match.

It also adds two testcases for filenames containing @ to make sure they
don't cause a crash and result in the exptected severity rank.


Acked-by: Steve Beattie <steve@nxnw.org>