[tor-bugs] #4897 [Tor Hidden Services]: seg fault in circuit_expire_building

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#4897: seg fault in circuit_expire_building
---------------------------------+------------------------------------------
 Reporter:  arma                 |          Owner:                    
     Type:  defect               |         Status:  new               
 Priority:  normal               |      Milestone:  Tor: 0.2.3.x-final
Component:  Tor Hidden Services  |        Version:                    
 Keywords:                       |         Parent:                    
   Points:                       |   Actualpoints:                    
---------------------------------+------------------------------------------

Comment(by arma):

 {{{
 (gdb) print victim
 $1 = <value optimized out>
 (gdb) print victim->n_conn->_base.address
 Cannot access memory at address 0x28
 (gdb) print victim->n_conn
 Cannot access memory at address 0x28
 (gdb) print victim
 $2 = <value optimized out>
 (gdb) print victim->n_circ_id
 Cannot access memory at address 0x30
 }}}

 not so useful.

 maybe victim is null?

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Ticket URL: <https://trac.torproject.org/projects/tor/ticket/4897#comment:1>
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