Objects/unicodeobject.c: In function ‘PyUnicode_IsIdentifier’:
./Include/cpython/unicodeobject.h:396:38: warning: ‘data’ may be used uninitialized in this function [-Wmaybe-uninitialized]
             ((const Py_UCS4 *)(data))[(index)] \
                                      ^
Objects/unicodeobject.c:12211:11: note: ‘data’ was declared here
     void *data;
           ^
In file included from ./Include/unicodeobject.h:1026:0,
                 from ./Include/Python.h:97,
                 from Objects/unicodeobject.c:42:
./Include/cpython/unicodeobject.h:391:6: warning: ‘kind’ may be used uninitialized in this function [-Wmaybe-uninitialized]
     ((Py_UCS4) \
      ^
Objects/unicodeobject.c:12210:9: note: ‘kind’ was declared here
     int kind;
         ^