[tor-bugs] #21771 [Core Tor/Tor]: Cannot change bridge (with Tor 0.3.0.4-rc)

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#21771: Cannot change bridge (with Tor 0.3.0.4-rc)
------------------------------+-----------------------------
     Reporter:  torvlnt33r    |      Owner:
         Type:  defect        |     Status:  new
     Priority:  Medium        |  Milestone:
    Component:  Core Tor/Tor  |    Version:  Tor: 0.3.0.4-rc
     Severity:  Normal        |   Keywords:  bridge
Actual Points:                |  Parent ID:
       Points:                |   Reviewer:
      Sponsor:                |
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 Trying to replace a bridge in torrc (that had been successfully used for a
 long time) with another one results in many warnings "[warn] Failed to
 find node for hop 0 of our path. Discarding this circuit.", and failure to
 connect.

 Only way out found is to edit "state" file and remove the "Guard" line for
 the previous bridge (with "listed=0"), or come back to previous bridge
 option in torrc.

 I found this while testing further after reporting what I initially
 thought was a bug in TorBrowser
 (https://trac.torproject.org/projects/tor/ticket/21768)

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21771>
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