[ARROW-11577] [Rust] Concat kernel panics on slices of string arrays

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.1, 4.0.0
• Component/s: Rust
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/27447
• Assignee: Ben Chambers
• Reporter: Ben Chambers
• Created: 09/Feb/21 22:47
• Updated: 11/Jan/23 08:20
• Resolved: 10/Feb/21 11:29

Description

See the test case below:

#[test]
fn test_string_array_slices() -> Result<()> {
    let input_1 = StringArray::from(vec!["hello", "A", "B", "C"]);
    let input_2 = StringArray::from(vec!["world", "D", "E", "Z"]);

    let arr = concat(&[
        input_1.slice(1, 3).as_ref(),
        input_2.slice(1, 2).as_ref(),
    ])?;

    let expected_output = StringArray::from(vec!["A", "B", "C", "D", "E"]);

    let actual_output = arr
        .as_any()
        .downcast_ref::<StringArray>()
        .unwrap();
    assert_eq!(actual_output, &expected_output);

    Ok(())
}

Fails with:

range end index 8 out of range for slice of length 7
thread 'compute::kernels::concat::tests::test_string_array_slices' panicked at 'range end index 8 out of range for slice of length 7', arrow/src/array/transform/variable_size.rs:38:23

Issue Links

• links to: GitHub Pull Request #9460