[tor-bugs] #27373 [Core Tor/Tor]: add UTF-8 validation code

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#27373: add UTF-8 validation code
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 Reporter:  cyberpunks           |          Owner:  (none)
     Type:  task                 |         Status:  needs_revision
 Priority:  Medium               |      Milestone:  Tor: 0.3.6.x-final
Component:  Core Tor/Tor         |        Version:
 Severity:  Normal               |     Resolution:
 Keywords:  rust-wants, prop285  |  Actual Points:
Parent ID:  #24033               |         Points:
 Reviewer:                       |        Sponsor:
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Comment (by cyberpunks):

 Replying to [comment:5 teor]:
 > Can you also check that Surrogate code points fail to validate?
 > I couldn't see any in there.

 They're in there. That's what `"\xed\xa0\x80"` and `"\xed\xbf\xbf"` are.
 They could be Unicode literals to make it clearer, but now I wonder if
 clang will warn about those too...

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/27373#comment:7>
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