UnboundLocalError: local variable '_response' referenced before assignment

[dimaqq]

Description

  File "/home/runner/work/python-libjuju/python-libjuju/juju/charmhub.py", line 95, in info
    result = json.loads(_response.text)
UnboundLocalError: local variable '_response' referenced before assignment

possibly after Fatal error on SSL transport

looking through the code, if the charmhub request fails with some other error then 404, response json is loaded, while response is not set.

Urgency

Casually reporting

Python-libjuju version

3.6.0.0

Juju version

any (hit on: 3.5/stable)

Reproduce / Test

https://github.com/juju/python-libjuju/actions/runs/12409171833/job/34642285834?pr=1245

[dimaqq]

this file has more than one static analyser warning about _response being possibly unbound.