diff -r ad56dff3602f Tools/unicode/mkstringprep.py
--- a/Tools/unicode/mkstringprep.py	Tue May 28 16:27:08 2013 +0300
+++ b/Tools/unicode/mkstringprep.py	Tue May 28 20:50:52 2013 +0300
@@ -71,6 +71,8 @@
         else:
             if not curname:
                 raise RuntimeError("End without start", l)
+            if curname != m.group(2):
+                raise RuntimeError("Unexpected end", l)
             curname = None
             continue
     if not curname: