Fix for randomely ocurring bug
Fix for randomely ocurring bug

The bug and it's fix are described by the first comment from Guido
in http://code.google.com/p/googleappengine/issues/detail?id=772.

Patch by: Guido van Rossum

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extra : convert_revision : svn%3A32761e7d-7263-4528-b7be-7235b26367ec/trunk%401263

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