Add test case for issue #3514#3701

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Skylion007 wants to merge 7 commits intopybind:masterfrom

Skylion007:test-issue-3514

Commits on Feb 8, 2022

Add test case for issue 3514
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Commits on Feb 10, 2022

Merge branch 'master' of https://github.com/pybind/pybind11 into test-issue-3514
Skylion007
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Commits on Feb 12, 2022

Merge branch 'master' of https://github.com/pybind/pybind11 into test-issue-3514
Skylion007
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Commits on Feb 18, 2022

Commits on Feb 19, 2022

Guard against failed downcast to null
Skylion007
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