Fix bug 1052242. Also includes rewrite of test case using unittest and

avoiding use of popen.

Lib/atexit.py

@@ -15,9 +15,22 @@ def _run_exitfuncs():
     last in, first out.
     """
 
+    exc_info = None
     while _exithandlers:
         func, targs, kargs = _exithandlers.pop()
-        func(*targs, **kargs)
+        try:
+            func(*targs, **kargs)
+        except SystemExit:
+            exc_info = sys.exc_info()
+        except:
+            import sys, traceback
+            print >> sys.stderr, "Error in atexit._run_exitfuncs:"
+            traceback.print_exc()
+            exc_info = sys.exc_info()
+
+    if exc_info is not None:
+        raise exc_info[0], exc_info[1], exc_info[2]
+
 
 def register(func, *targs, **kargs):
     """register a function to be executed upon normal program termination
@@ -33,7 +46,6 @@ if hasattr(sys, "exitfunc"):
     # Assume it's another registered exit function - append it to our list
     register(sys.exitfunc)
 sys.exitfunc = _run_exitfuncs
-
 del sys
 
 if __name__ == "__main__":