Merge commit 'origin/maint-0.2.1'

ChangeLog

@@ -336,6 +336,9 @@ Changes in Version 0.2.1.21 - 20??-??-??
       handshake from working unless we explicitly tell OpenSSL that we are
       using SSL renegotiation safely.  We are, of course, but OpenSSL
       0.9.8l won't work unless we say we are.
+    - Avoid crashing if the client is trying to upload many bytes and the
+      circuit gets torn down at the same time, or if the flip side
+      happens on the exit relay. Bugfix on 0.2.0.1-alpha; fixes bug 1150.
 
   o Minor bugfixes:
     - Do not refuse to learn about authority certs and v2 networkstatus

src/or/circuitlist.c

@@ -1103,6 +1103,7 @@ _circuit_mark_for_close(circuit_t *circ, int reason, int line,
     edge_connection_t *conn;
     for (conn=or_circ->n_streams; conn; conn=conn->next_stream)
       connection_edge_destroy(or_circ->p_circ_id, conn);
+    or_circ->n_streams = NULL;
 
     while (or_circ->resolving_streams) {
       conn = or_circ->resolving_streams;
@@ -1126,6 +1127,7 @@ _circuit_mark_for_close(circuit_t *circ, int reason, int line,
     edge_connection_t *conn;
     for (conn=ocirc->p_streams; conn; conn=conn->next_stream)
       connection_edge_destroy(circ->n_circ_id, conn);
+    ocirc->p_streams = NULL;
   }
 
   circ->marked_for_close = line;