diff --git a/test2.scm b/test2.scm
index ba3e1c8f..382799d5 100644
--- a/test2.scm
+++ b/test2.scm
@@ -2,6 +2,11 @@
         (scheme file)
         (scheme write))
 
+; TODO: I think this compiles OK (test), but interpreter does not like it:
+;cyclone> ( call-with-output-file "test.txt" (lambda () #f))
+;Error: Unable to evaluate:  ((procedure () ...) <port>)
+
+; TODO: need to get this working in compiler, then try interpreter:
 (with-output-to-file 
   "test.out" 
   (lambda ()