From 24824813baca61c8eaaceed644ed14067b755dd6 Mon Sep 17 00:00:00 2001
From: Nick Mathewson <nickm@torproject.org>
Date: Wed, 14 Apr 2004 04:19:12 +0000
Subject: [PATCH] Do not segfault on missing intro points.

svn:r1616
---
 trunk/src/or/rendservice.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/trunk/src/or/rendservice.c b/trunk/src/or/rendservice.c
index 289e2bf079..e7f787e4cd 100644
--- a/trunk/src/or/rendservice.c
+++ b/trunk/src/or/rendservice.c
@@ -251,7 +251,7 @@ static void rend_service_update_descriptor(rend_service_t *service)
   for (i=0; i < n; ++i) {
     router = router_get_by_nickname(smartlist_get(service->intro_nodes, i));
     circ = find_intro_circuit(router, service->pk_digest);
-    if (circ->purpose == CIRCUIT_PURPOSE_S_INTRO) {
+    if (circ && circ->purpose == CIRCUIT_PURPOSE_S_INTRO) {
       /* We have an entirely established intro circuit. */
       d->intro_points[d->n_intro_points++] = tor_strdup(router->nickname);
     }