[tor-bugs] #21329 [Core Tor/Tor]: onions/detached and onions/current should return empty lists instead of errors

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#21329: onions/detached and onions/current should return empty lists instead of
errors
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 Reporter:  meejah        |          Owner:
     Type:  defect        |         Status:  reopened
 Priority:  Medium        |      Milestone:  Tor: 0.3.1.x-final
Component:  Core Tor/Tor  |        Version:  Tor: 0.2.9.9
 Severity:  Normal        |     Resolution:
 Keywords:  controller    |  Actual Points:
Parent ID:                |         Points:
 Reviewer:                |        Sponsor:
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Comment (by meejah):

 atagar: this breaks multi-key GETINFO queries, though; all other "empty
 things" in the control protocol return an empty-list like that.

 So, if you do `GETINFO info/names onions/current` then you'll get a 551
 and the whole thing fails (instead of, for all other cases, getting two
 answers)...

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21329#comment:14>
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