harsha abeykoon / Mbed 2 deprecated rtest

if line number 55 is omitted the program runs. But why?

Diff: mbos.lib

Revision:
0:e1853421807f
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbos.lib	Wed Jan 11 05:12:37 2012 +0000
@@ -0,0 +1,1 @@
+http://mbed.org/users/AndrewL/code/mbos/#cf660b28b2a4