Fix: support empty Struct fields in Arrow IPC decoding #57
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Decoding failed for IPC streams containing empty structs (
struct {}) generated by external encoders (e.g. Rust).According to my research the Arrow spec does not forbid structs without children.
This PR should:
Structfieldsint32,struct {},int32All tests pass
Ran into this with real data; a broader review of empty/null field handling may be worthwhile.