[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 4908fae3d57f68694cf006e89fd7761f45003447 by Victor Stinner in branch 'master':
bpo-43916: PyStdPrinter_Type uses Py_TPFLAGS_DISALLOW_INSTANTIATION (GH-25749)
https://github.com/python/cpython/commit/4908fae3d57f68694cf006e89fd7761f45003447


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