[tor-bugs] #7440 [Tor]: Path Bias code should count circuit destructions as failures

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#7440: Path Bias code should count circuit destructions as failures
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 Reporter:  mikeperry                    |          Owner:  mikeperry         
     Type:  defect                       |         Status:  new               
 Priority:  major                        |      Milestone:  Tor: 0.2.4.x-final
Component:  Tor                          |        Version:                    
 Keywords:  MikePerry201211, tor-client  |         Parent:                    
   Points:                               |   Actualpoints:                    
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 Right now, the path bias code counts any circuit that succeeds as a
 success. However, this is incorrect. Circuits can still be tagged *after*
 they succeed, by embedding the tag in a RELAY_BEGIN or RELAY_RESOLVE.

 Clients should therefore decrement a guard's success count and increment
 the failure count for any circuit that is destroyed after successful
 construction, but hasn't successfully carried any streams.

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/7440>
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