From dc7d1ef2f3cc57d31a70991827c65fe79dbcad47 Mon Sep 17 00:00:00 2001
From: Roger Dingledine <arma@torproject.org>
Date: Sat, 20 Mar 2004 20:21:20 +0000
Subject: [PATCH] make servers not crash when they rep-hist-note circuits that
 don't start at them

svn:r1317
---
 trunk/src/or/circuit.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/trunk/src/or/circuit.c b/trunk/src/or/circuit.c
index 9c07532ff2..45b10ee252 100644
--- a/trunk/src/or/circuit.c
+++ b/trunk/src/or/circuit.c
@@ -833,6 +833,14 @@ circuit_rep_hist_note_result(circuit_t *circ)
   char *prev_nickname = NULL;
   routerinfo_t *router;
   hop = circ->cpath;
+  if(!hop) {
+    /* XXX
+     * if !hop, then we're not the beginning of this circuit.
+     * for now, just forget about it. later, we should remember when
+     * extends-through-us failed, too.
+     */
+    return;
+  }
   if (options.ORPort) {
     prev_nickname = options.Nickname;
   }