[ARROW-9652] [Rust][DataFusion] Panic trying to select * from a CSV (panicked at 'index out of bounds: the len is 0 but the index is 0)

• Type: Bug
• Status: Resolved
• Priority: Minor
• Resolution: Fixed
• Fix Version/s: 2.0.0
• Component/s: Rust, Rust - DataFusion
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/25711
• Assignee: Andrew Lamb
• Reporter: Andrew Lamb
• Created: 05/Aug/20 12:20
• Updated: 11/Jan/23 08:08
• Resolved: 10/Aug/20 14:15

Description

I was trying to write a reproducer for another bug, and I hit this one:

Repro:

CREATE EXTERNAL TABLE repro
STORED AS CSV
LOCATION 'repro.csv';

select * from repro;

The contents of repro.csv are as follows (also attached):

a,b
1,100
1,200
2,100
2,200
2,300

Expected behavior: a table of 2 columns, 5 rows is returned

Actual behavior: A panic occurs:

> select * from repro;
thread 'main' panicked at 'index out of bounds: the len is 0 but the index is 0', datafusion/src/optimizer/projection_push_down.rs:238:31
note: run with `RUST_BACKTRACE=1` environment variable to display a backtrace

I'll try and look into it myself, but I wanted to get the repro up first.

Issue Links

• links to: GitHub Pull Request #7906