alamb opened a new issue, #9780:
URL: https://github.com/apache/arrow-rs/issues/9780
There's a fun little degenerate test case here:
```rust
#[test]
fn test_fixed_size_list_zero_size() {
let buf = r#"
{"a": []}
{"a": null}
{"a": []}
"#;
let field = Field::new_list_field(DataType::Int32, true);
let schema = Arc::new(Schema::new(vec![Field::new(
"a",
DataType::FixedSizeList(Arc::new(field), 0),
false,
)]));
let batches = do_read(buf, 1024, false, false, schema);
assert_eq!(batches.len(), 1);
let col = batches[0].column(0).as_fixed_size_list();
assert_eq!(col.len(), 3);
assert_eq!(col.value_length(), 0);
let values = col.values().as_primitive::<Int32Type>();
assert!(values.values().is_empty());
}
```
It seems to panic within struct array decoding. Could be worth exploring in
this PR if there is capacity, though considering this PR is adding a new
feature I wouldn't block it on this case.
_Originally posted by @Jefffrey in
https://github.com/apache/arrow-rs/pull/9715#pullrequestreview-4135879717_
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