1 files changed, 3 insertions, 0 deletions
diff --git a/nest/rt-table.c b/nest/rt-table.c
index c53fd195..e4c85fd4 100644
--- a/nest/rt-table.c
+++ b/nest/rt-table.c
@@ -618,6 +618,9 @@ rt_notify_basic(struct channel *c, const net_addr *net, rte *new, rte *old)
   if (old && !bmap_test(&c->export_map, old->id))
     old = NULL;
 
+  if (old && (old->sender == c->in_req.hook))
+    bug("bad-behaved pipe");
+
   if (!new && !old)
     return;