584 static PyObject * hdr_subscript(hdrObject * s, PyObject * item)
585 {
586     rpmTagVal tag;
587 
588     if (!tagNumFromPyObject(item, &tag)) return NULL;
589     return hdrGetTag(s->h, tag);
when considering value == (int)0 from header-py.c:589
taking True path
590 }
591