Index: files/fbsd-threads.c
===================================================================
--- files/fbsd-threads.c        (revision 385904)
+++ files/fbsd-threads.c        (working copy)
@@ -441,6 +441,8 @@
   fbsd_thread_active = 1;
   if (target_has_execution)
     enable_thread_event_reporting ();
+  else
+    init_thread_list ();
   fbsd_thread_update_thread_list (NULL);
   get_current_thread ();
 }