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Vinay Sajip committed 73dad49

Closes #13807: Now checks for sys.stderr being there before writing to it.

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Lib/logging/__init__.py

         You could, however, replace this with a custom handler if you wish.
         The record which was being processed is passed in to this method.
         """
-        if raiseExceptions:
+        if raiseExceptions and sys.stderr:  # see issue 13807
             ei = sys.exc_info()
             try:
                 traceback.print_exception(ei[0], ei[1], ei[2], None, sys.stderr)