[issue43916] Mark static types newly converted to heap types as immutable: add Py_TPFLAGS_DISALLOW_INSTANTIATION type flag

[STINNER Victor]

STINNER Victor <vstinner at python.org> added the comment:


New changeset 387397f8a4244c983f4568c16a28842e3268fe5d by Erlend Egeberg Aasland in branch 'master':
bpo-43916: select.poll uses Py_TPFLAGS_DISALLOW_INSTANTIATION (GH-25750)
https://github.com/python/cpython/commit/387397f8a4244c983f4568c16a28842e3268fe5d


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