Index: Lib/hotshot/log.py
===================================================================
--- Lib/hotshot/log.py	(revision 60977)
+++ Lib/hotshot/log.py	(working copy)
@@ -107,7 +107,10 @@
                 return what, t, tdelta
 
             if what == WHAT_EXIT:
-                return what, self._pop(), tdelta
+                try:
+                    return what, self._pop(), tdelta
+                except IndexError:
+                    raise StopIteration("pop from empty list")
 
             if what == WHAT_LINENO:
                 filename, firstlineno, funcname = self._stack[-1]