[tor-bugs] #24367 [Core Tor/Tor]: Changing pluggable transports (during start-up) in Tor Browser is broken

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#24367: Changing pluggable transports (during start-up) in Tor Browser is broken
-------------------------------------------------+-------------------------
 Reporter:  gk                                   |          Owner:  (none)
     Type:  defect                               |         Status:
                                                 |  assigned
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.3.2.x-final
Component:  Core Tor/Tor                         |        Version:  Tor:
                                                 |  0.3.2.1-alpha
 Severity:  Normal                               |     Resolution:
 Keywords:  regression, tor-bridge-client,       |  Actual Points:
  s8-errors                                      |
Parent ID:                                       |         Points:  0.5
 Reviewer:                                       |        Sponsor:
                                                 |  Sponsor8-can
-------------------------------------------------+-------------------------

Comment (by gk):

 If you look at the log for d7833c9d27feed9 you'll see that the guard list
 gets updated with `obfs4` bridges as is done in the log for
 6370fb77c586e9a:
 {{{
 Nov 22 11:37:05.000 [info] entry_guards_update_primary(): Primary entry
 guards have changed. New primary guard list is:
 Nov 22 11:37:05.000 [info] entry_guards_update_primary():   1/3: [bridge]
 ($A832D176ECD5C7C6B58825AE22FC4C90FA249637)
 Nov 22 11:37:05.000 [info] entry_guards_update_primary():   2/3: [bridge]
 ($D9A82D2F9C2F65A18407B1D2B764F130847F8B5D)
 Nov 22 11:37:05.000 [info] entry_guards_update_primary():   3/3: [bridge]
 ($CDF2E852BF539B82BD10E27E9115A31734E378C2)
 }}}
 So, that part is good. However and contrary to what is happening in the
 6370fb77c586e9a case those are not getting used/tried. Rather, the
 previously used `obfs3` bridge is still present:
 {{{
 Nov 22 11:37:06.000 [info] sample_reachable_filtered_entry_guards():
 (Selected [bridge] ($A09D536DD1752D542E1FBB3C9CE4449D51298239).)
 Nov 22 11:37:06.000 [info] select_entry_guard_for_circuit(): No primary or
 confirmed guards available. Selected random guard [bridge]
 ($A09D536DD1752D542E1FBB3C9CE4449D51298239) for circuit. Will try other
 guards before using this circuit.
 }}}

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/24367#comment:17>
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