kawadakk opened a new issue, #7164:
URL: https://github.com/apache/arrow-rs/issues/7164
**Describe the bug**
`RowConverter::convert_rows` always decodes `List(Null)` as empty lists.
**To Reproduce**
```rust
let mut builder = GenericListBuilder::<O, _>::new(NullBuilder::new());
builder.values().append_nulls(0);
builder.append(true);
builder.append(false);
builder.values().append_nulls(2);
builder.append(true);
let list = Arc::new(builder.finish()) as ArrayRef;
let d = list.data_type().clone();
let converter = RowConverter::new(vec![SortField::new(d.clone())]).unwrap();
let rows = converter.convert_columns(&[Arc::clone(&list)]).unwrap();
assert!(rows.row(0) > rows.row(1)); // [null] > null
assert!(rows.row(0) < rows.row(2)); // [null] < [null, null]
assert!(rows.row(1) < rows.row(2)); // null < [null, null]
let back = converter.convert_rows(&rows).unwrap();
assert_eq!(back.len(), 1);
back[0].to_data().validate_full().unwrap();
assert_eq!(&back[0], &list);
```
Adding the above code to `test_single_list` in `arrow-row/src/lib.rs` causes
a test failure:
```
thread 'tests::test_list' panicked at arrow-row/src/lib.rs:2111:9:
assertion `left == right` failed
left: ListArray
[
NullArray(0),
null,
NullArray(0),
]
right: ListArray
[
NullArray(0),
null,
NullArray(2),
]
```
**Expected behavior**
Not panicking
**Additional context**
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