[tor-bugs] #11986 [Ooni]: ooni crashes if no collector option is used with several decks

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#11986: ooni crashes if no collector option is used with several decks
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 Reporter:  cypherpunks  |          Owner:  hellais
     Type:  defect       |         Status:  new
 Priority:  normal       |      Milestone:
Component:  Ooni         |        Version:
 Keywords:               |  Actual Points:
Parent ID:               |         Points:
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 This issue was automatically migrated from github issue
 https://github.com/TheTorProject/ooni-probe/issues/274.

 Also fails with data/decks/fast_no_root.deck.

 When ooni-probe is run without a bouncer (-n), decks that depend upon
 learning about test helpers should either fail gracefully with a message.
 Optionally, we could skip such tests and run the remaining tests that do
 not need test helpers.
 ```ooniprobe -n -i data/decks/complete_no_root.deck
 Log opened.
 [D] Tor is not running. Skipping IP lookup via Tor.
 [D] Cannot determine the probe IP address with a traceroute, becase of
 insufficient priviledges
 Looking up your IP address via torproject
 Not reporting using a collector
 [D] Checking if backend is present
 [!] Missing required option: "backend"
 Traceback (most recent call last):
   File "bin/ooniprobe", line 17, in <module>
     runWithDirector()
   File "/home/ooni/ooni-probe/ooni/oonicli.py", line 161, in
 runWithDirector
     print net_test_loader.usageOptions().getUsage()
 UnboundLocalError: local variable 'net_test_loader' referenced before
 assignment```

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/11986>
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