apt doesn't handle non-existant referenced packages

[Stefano Rivera]

Query: apt show kde
ERROR:scripts.ibid-plugin:Exception occured in Aptitude processor of sysadmin plugin
Traceback (most recent call last):
  File "scripts/ibid-plugin", line 131, in <module>
    processor.process(event)
  File "./ibid/plugins/__init__.py", line 144, in process
    method(event, *match.groups())
  File "./ibid/plugins/sysadmin.py", line 105, in show
    raise Exception("We couldn't successfully parse aptitude's output")
Exception: We couldn't successfully parse aptitude's output
Response: I'm not feeling too well

$ aptitude show kde
No current or candidate version found for kde
Package: kde
State: not a real package