Since https://github.com/python/cpython/pull/131438, clang-cl fails to compile, see e.g. the tailcall Windows CI https://github.com/python/cpython/actions/runs/13967899073/job/39102464260 Discussion started with @zooba in https://github.com/python/cpython/pull/131438#issuecomment-2741211464. <!-- gh-linked-prs --> ### Linked PRs * gh-131526 <!-- /gh-linked-prs -->