Index: subprocess.py
===================================================================
--- subprocess.py	(revisión: 69009)
+++ subprocess.py	(copia de trabajo)
@@ -894,7 +894,10 @@
                 errwrite.Close()
 
 
-        def _internal_poll(self, _deadstate=None):
+        # this may be called from __del__, keep a reference to all used names
+        def _internal_poll(self, _deadstate=None, 
+                WaitForSingleObject=WaitForSingleObject,
+                GetExitCodeProcess=GetExitCodeProcess):
             """Check if child process has terminated.  Returns returncode
             attribute."""
             if self.returncode is None:
@@ -1154,7 +1157,8 @@
                 raise child_exception
 
 
-        def _handle_exitstatus(self, sts):
+        # this may be called from __del__, keep a reference to all used names
+        def _handle_exitstatus(self, sts, os=os):
             if os.WIFSIGNALED(sts):
                 self.returncode = -os.WTERMSIG(sts)
             elif os.WIFEXITED(sts):
@@ -1164,7 +1168,8 @@
                 raise RuntimeError("Unknown child exit status!")
 
 
-        def _internal_poll(self, _deadstate=None):
+        # this may be called from __del__, keep a reference to all used names
+        def _internal_poll(self, _deadstate=None, os=os):
             """Check if child process has terminated.  Returns returncode
             attribute."""
             if self.returncode is None: