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Subject: [Bug middle-end/38660] Pointer value changed to NULL
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------- Comment #3 from pinskia at gcc dot gnu dot org  2008-12-29 18:05 -------
  ( (((PyObject *) &_Py_TrueStruct))->ob_refcnt++);


Yes that is obvious an alias violation.


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http://gcc.gnu.org/bugzilla/show_bug.cgi?id=38660