[tor-bugs] #5644 [Tor Client]: rend_service_introduce() asserts circuit->rend_data before checking for proto violation

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#5644: rend_service_introduce() asserts circuit->rend_data before checking for
proto violation
---------------------------+------------------------------------------------
    Reporter:  asn         |       Owner:                    
        Type:  defect      |      Status:  closed            
    Priority:  major       |   Milestone:  Tor: 0.2.2.x-final
   Component:  Tor Client  |     Version:                    
  Resolution:  fixed       |    Keywords:                    
      Parent:  #5643       |      Points:                    
Actualpoints:              |  
---------------------------+------------------------------------------------

Comment(by asn):

 The result looks good:
 https://gitweb.torproject.org/tor.git/blob/HEAD:/src/or/rendservice.c#l1066
 https://gitweb.torproject.org/tor.git/blob/refs/heads/maint-0.2.2:/src/or/rendservice.c#l911

 I tried to trigger the bug on a patched `master` and I got:
 {{{
 [warn] Got an INTRODUCE2 over a non-introduction circuit 56994.
 }}}

-- 
Ticket URL: <https://trac.torproject.org/projects/tor/ticket/5644#comment:6>
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