diff -r 06c3ec0b452e -r bd61b03b9eaa while1.scala
--- a/while1.scala	Wed Nov 28 07:00:35 2012 +0000
+++ b/while1.scala	Wed Nov 28 07:03:29 2012 +0000
@@ -172,7 +172,7 @@
 //examples
 
 //eval_prog("loops.while")
-//eval_prog("fib.while")
+eval_prog("fib.while")
 
 
 def time_needed[T](i: Int, code: => T) = {