--- pdb.py	2010-07-12 06:52:35.593750000 +0400
+++ pdb_	2010-07-12 07:01:49.156250000 +0400
@@ -467,7 +467,8 @@
         Return `lineno` if it is, 0 if not (e.g. a docstring, comment, blank
         line or EOF). Warning: testing is not comprehensive.
         """
-        line = linecache.getline(filename, lineno, self.curframe.f_globals)
+        globals = self.curframe.f_globals if hasattr(self,'curframe') else None
+        line = linecache.getline(filename, lineno, globals)
         if not line:
             print >>self.stdout, 'End of file'
             return 0