Jefffrey commented on code in PR #11209:
URL: https://github.com/apache/arrow-rs/pull/11209#discussion_r4151368539
##########
arrow-data/src/transform/mod.rs:
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@@ -843,6 +843,16 @@ impl<'a> MutableArrayData<'a> {
));
}
+ if len == 0 {
+ return Ok(());
+ }
+
+ if matches!(&self.data.data_type, DataType::Union(fields, _) if
fields.is_empty()) {
Review Comment:
> cargo validation could not run locally because Cargo is not installed.
this is concerning...
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