[tor-bugs] #19669 [Core Tor/Tor]: `log_prefix_` maybe getting weird output from strftime

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#19669: `log_prefix_` maybe getting weird output from strftime
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 Reporter:  dcf           |          Owner:
     Type:  defect        |         Status:  needs_information
 Priority:  Low           |      Milestone:  Tor: 0.3.0.x-final
Component:  Core Tor/Tor  |        Version:
 Severity:  Minor         |     Resolution:
 Keywords:  easy          |  Actual Points:
Parent ID:                |         Points:
 Reviewer:                |        Sponsor:
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Changes (by nickm):

 * priority:  Medium => Low
 * keywords:   => easy
 * status:  new => needs_information
 * milestone:   => Tor: 0.3.0.x-final


Comment:

 I bet that log_prefix_ is miscounting the number of characters in the
 prefix, because of a system vsnprintf implementation that returns 0 rather
 than the number of characters emitted.

 I'd take a patch for this if somebody writes one.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/19669#comment:1>
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