Index: Lib/pdb.py
===================================================================
--- Lib/pdb.py	(Revision 74308)
+++ Lib/pdb.py	(Arbeitskopie)
@@ -1211,7 +1211,8 @@
         self.mainpyfile = self.canonic(filename)
         self._user_requested_quit = 0
         with open(filename) as fp:
-            statement = "exec(%r)" % (fp.read(),)
+            statement = "exec(compile(%r, %r, 'exec'))" % \
+                        (fp.read(), self.mainpyfile)
         self.run(statement)
 
 # Simplified interface