I get the following compiler warning now:

In file included from ./Include/Python.h:66:0,
                 from /cpython/Modules/_ssl.c:19:
/cpython/Modules/_ssl.c: In function ‘_setup_ssl_threads’:
./Include/pymem.h:136:18: warning: comparison is always false due to limited range of data type [-Wtype-limits]
   ( ((size_t)(n) > PY_SSIZE_T_MAX / sizeof(type)) ? NULL : \
                  ^
/cpython/Modules/_ssl.c:5076:22: note: in expansion of macro ‘PyMem_New’
         _ssl_locks = PyMem_New(PyThread_type_lock, _ssl_locks_count);
                      ^