[tor-bugs] #21900 [Core Tor/Tor]: evdns fails when resolv.conf is missing, but succeeds when resolv.conf is empty

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#21900: evdns fails when resolv.conf is missing, but succeeds when resolv.conf is
empty
-------------------------------------------------+-------------------------
 Reporter:  teor                                 |          Owner:  rl1987
     Type:  defect                               |         Status:  closed
 Priority:  Medium                               |      Milestone:  Tor:
                                                 |  0.3.6.x-final
Component:  Core Tor/Tor                         |        Version:
 Severity:  Normal                               |     Resolution:  fixed
 Keywords:  technical-debt, dns, crash, tor-     |  Actual Points:
  relay, macos, 032-unreached                    |
Parent ID:                                       |         Points:  2
 Reviewer:  nickm                                |        Sponsor:
-------------------------------------------------+-------------------------

Comment (by teor):

 Commit b7edfcbf6b in this branch introduces a memory leak: tor_addr needs
 to be freed if it is not returned by the function. See #28257.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/21900#comment:19>
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