[tor-bugs] #19947 [Core Tor/Tor]: NULL %s in fmt string (dir_server_new() - routerlist.c)

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#19947: NULL %s in fmt string (dir_server_new() - routerlist.c)
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 Reporter:  rubiate       |          Owner:
     Type:  defect        |         Status:  new
 Priority:  Medium        |      Milestone:
Component:  Core Tor/Tor  |        Version:
 Severity:  Normal        |     Resolution:
 Keywords:                |  Actual Points:
Parent ID:                |         Points:
 Reviewer:                |        Sponsor:
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Comment (by rubiate):

 Passing `hostname_` instead would fix this as it always gets set to a
 value (either the same as `hostname` if it's not NULL, or the address).

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/19947#comment:1>
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