+2017-04-10 Pedro Alves <palves@redhat.com>
+
+ * thread.c (struct current_thread_cleanup) <next>: Delete field.
+ (current_thread_cleanup_chain): Delete.
+ (restore_current_thread_cleanup_dtor)
+ (make_cleanup_restore_current_thread): Remove references to
+ current_thread_cleanup_chain.
+