Added one more check.

diff --git a/lib/mainloop.c b/lib/mainloop.c
index 95709a311a0c08743015950e6c84f6160098e26b..93cea343970358ba88dd26ebc8ff36d2a162238a 100644 (file)
--- a/lib/mainloop.c
+++ b/lib/mainloop.c
@@ -229,6 +229,7 @@ void
 process_add(struct main_process *mp)
 {
   ASSERT(!mp->n.next);
+  ASSERT(mp->handler);
   clist_add_tail(&main_process_list, &mp->n);
   if (!main_sigchld_set_up)
     {