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Which issue does this PR close?
Closes #11069.
unshred_variantpanics when a present shredded field name is missing from metadata.What changes are included in this PR?
Add
VariantBuilderExt::try_append_valueand propagate builder errors through unshredding, including nested objects and list elements.Are these changes tested?
Regression tests cover missing metadata names, absent fields, and parent nulls. Variant crate tests, formatting, and Clippy pass.
Are there any user-facing changes?
Missing metadata field names now produce
ArrowErrorinstead of a panic. Existingappend_valueAPIs remain available.