fix an assert trigger in cvs: if a resolve request fails, and the circuit

has vanished in the meantime, then we would both mark it for close
(i.e. put it on the closeable list) and also immediately free it.


svn:r3759

src/or/dns.c

@@ -277,7 +277,8 @@ int dns_resolve(connection_t *exitconn) {
         circ = circuit_get_by_conn(exitconn);
         if (circ)
           circuit_detach_stream(circ, exitconn);
-        connection_free(exitconn);
+        if (!exitconn->marked_for_close)
+          connection_free(exitconn);
         return -1;
     }
     tor_assert(0);