[tor-bugs] #29960 [Core Tor/Tor]: Actually check for errors in digest256_to_base64() and callers

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#29960: Actually check for errors in digest256_to_base64() and callers
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 Reporter:  teor                      |          Owner:  teor
     Type:  defect                    |         Status:  needs_revision
 Priority:  Medium                    |      Milestone:  Tor: 0.4.1.x-final
Component:  Core Tor/Tor              |        Version:  Tor: 0.2.2.6-alpha
 Severity:  Normal                    |     Resolution:
 Keywords:  technical-debt, fast-fix  |  Actual Points:  0.2
Parent ID:                            |         Points:  0.2
 Reviewer:  nickm                     |        Sponsor:  Sponsor31-can
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Comment (by teor):

 https://github.com/torproject/tor/pull/888 in #29959 removes the check in
 format_networkstatus_vote(), so I should avoid touching those lines in my
 revised patch.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/29960#comment:4>
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