[tor-bugs] #23255 [Metrics/CollecTor]: Fix a bug while sanitizing bridge network statuses without entries

[Tor Bug Tracker & Wiki]

#23255: Fix a bug while sanitizing bridge network statuses without entries
-----------------------------------+--------------------------
     Reporter:  karsten            |      Owner:  metrics-team
         Type:  defect             |     Status:  new
     Priority:  Very High          |  Milestone:
    Component:  Metrics/CollecTor  |    Version:
     Severity:  Normal             |   Keywords:
Actual Points:                     |  Parent ID:
       Points:                     |   Reviewer:
      Sponsor:                     |
-----------------------------------+--------------------------
 Due to an error on the bridge authority, it produced statuses without any
 entries, just with a header. Those caused a `NullPointerException` in
 CollecTor's bridgedescs module. I found the bug and will provide a branch
 for review in a second. We should merge and deploy really soon (tonight or
 early tomorrow).

--
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/23255>
Tor Bug Tracker & Wiki <https://trac.torproject.org/>
The Tor Project: anonymity online