Ashwini Sharma pointed out I screwed up last.c.

Renamed the function, missed a user...
diff --git a/toys/pending/last.c b/toys/pending/last.c
index 223082f..b207afe 100644
--- a/toys/pending/last.c
+++ b/toys/pending/last.c
@@ -36,7 +36,7 @@
 static void free_list()
 {
   if (TT.list) {
-    llist_traverse(TT.list, free_arg_list);
+    llist_traverse(TT.list, llist_free_arg);
     TT.list = NULL;
   }
 }