test: reject shared_ptr casts for custom holders - #6069
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rwgk merged 2 commits intoMay 19, 2026
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Lock down the current behavior discussed in issue pybind#6064: py::cast() from std::shared_ptr<T> remains rejected for custom holder bindings that are not std::shared_ptr or py::smart_holder. This extracts the incompatible-holder coverage from PR pybind#6068 and adds a test shaped like issue pybind#6064, while PR pybind#6065 and PR pybind#6066 explore alternative support paths.
This was referenced May 18, 2026
virtuald
approved these changes
May 19, 2026
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Description
Closes #6064
Lock down the current behavior discussed in issue #6064:
py::cast()fromstd::shared_ptr<T>remains rejected for custom holder bindings that are notstd::shared_ptrorpy::smart_holder.This extracts the incompatible-holder coverage from PR #6068 and adds a test shaped like issue #6064.
See also: PR #6065, PR #6066
Suggested changelog entry: