[tor-bugs] #20996 [Core Tor/Tor]: IPv6-only client fails to bootstrap on microdescriptor fetch/fallback

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#20996: IPv6-only client fails to bootstrap on microdescriptor fetch/fallback
---------------------------------------------+-----------------------------
 Reporter:  mtigas                           |          Owner:
     Type:  defect                           |         Status:
                                             |  needs_review
 Priority:  High                             |      Milestone:  Tor:
                                             |  0.3.0.x-final
Component:  Core Tor/Tor                     |        Version:  Tor:
                                             |  0.2.8.5-rc
 Severity:  Normal                           |     Resolution:
 Keywords:  ipv6, fallback, review-group-14  |  Actual Points:
Parent ID:                                   |         Points:  0.5
 Reviewer:  nickm                            |        Sponsor:
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Comment (by nickm):

 I still don't understand this part:
 > I have a question, though: why are we changing the semantics of
 ClientPreferIPv6*Port ...?

 That is, _why_ are we making it so "PreferIPv6" implies "UseIPv6"?

 And should we make corresponding changes in the manpage and in the note
 the change in the changes file?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/20996#comment:10>
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