132 static PyObject * hdrKeyList(hdrObject * s)
133 {
134     PyObject * keys = PyList_New(0);
when PyList_New() succeeds
135     HeaderIterator hi = headerInitIterator(s->h);
136     rpmTagVal tag;
137 
138     while ((tag = headerNextTag(hi)) != RPMTAG_NOT_FOUND) {
when taking True path
139 	PyObject *to = PyInt_FromLong(tag);
when PyInt_FromLong() fails
140 	PyList_Append(keys, to);
returning -1 from PyList_Append() due to NULL item
141 	Py_DECREF(to);
dereferencing NULL (to->ob_refcnt) at header-py.c:142
142     }
143     headerFreeIterator(hi);
144 
145     return keys;
146 }
147 

132 static PyObject * hdrKeyList(hdrObject * s)
133 {
134     PyObject * keys = PyList_New(0);
when PyList_New() fails
135     HeaderIterator hi = headerInitIterator(s->h);
136     rpmTagVal tag;
137 
138     while ((tag = headerNextTag(hi)) != RPMTAG_NOT_FOUND) {
when taking True path
139 	PyObject *to = PyInt_FromLong(tag);
when PyInt_FromLong() succeeds
140 	PyList_Append(keys, to);
calling PyList_Append with NULL (gcc.VarDecl('keys')) as argument 1 at header-py.c:141
PyList_Append() invokes Py_TYPE() on the pointer via the PyList_Check() macro, thus accessing (NULL)->ob_type
found 1 similar trace(s) to this
141 	Py_DECREF(to);
142     }
143     headerFreeIterator(hi);
144 
145     return keys;
146 }
147