[tor-bugs] #27080 [Core Tor/Tor]: bridges fail on Tor 0.3.4.1-alpha and later

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#27080: bridges fail on Tor 0.3.4.1-alpha and later
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 Reporter:  teor                                 |          Owner:  (none)
     Type:  defect                               |         Status:
                                                 |  needs_information
 Priority:  High                                 |      Milestone:  Tor:
                                                 |  0.3.5.x-final
Component:  Core Tor/Tor                         |        Version:  Tor:
                                                 |  0.3.4.1-alpha
 Severity:  Blocker                              |     Resolution:
 Keywords:  034-must, 035-must, regression,      |  Actual Points:
  tor-bridge 034-backport                        |
Parent ID:                                       |         Points:
 Reviewer:                                       |        Sponsor:
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Comment (by nickm):

 Ah.  And the reason that router_have_minimum_dir_info() is returning 1
 here is twofold: It thinks that we have 44% of paths available (which
 seems suspect), and we have set `PathsNeededToBuildCircuits 0.25` in the
 chutney torrc.

 As an experiment, I tried increasing PathsNeededToBuildCircuits to .75 in
 common.i.  With that change, the bridge-min chutney test passes on master.

 Now, here's the question: what did we change in 0.3.4 that broke this?

 And is it truly affecting real bridges?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/27080#comment:13>
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