[GitHub] [arrow-rs] tustvold opened a new issue, #1596: Filtering Dense UnionArray Produces Invalid Offsets

[GitBox <gi...@apache.org>]

tustvold opened a new issue, #1596:
URL: https://github.com/apache/arrow-rs/issues/1596

   **Describe the bug**
   
   build_extend_dense blindly copies offsets from the source array across, which can lead to invalid offsets in the filtered array
   
   **To Reproduce**
   
   ```
   let mut builder = UnionBuilder::new_dense(4);
   builder.append::<Int32Type>("A", 1).unwrap();
   builder.append::<Float64Type>("B", 3.2).unwrap();
   builder.append::<Float64Type>("B", 3.2).unwrap();
   let array = builder.build().unwrap();
   
   let filter_array = BooleanArray::from(vec![true, false, true]);
   let c = filter(&array, &filter_array).unwrap();
   let filtered = c.as_any().downcast_ref::<UnionArray>().unwrap();
   
   filtered.value(1);
   ```
   
   Panics with
   
   ```
   thread 'compute::kernels::filter::tests::test_filter_union_array_dense_with_nulls' panicked at 'assertion failed: (offset + length) <= self.len()', arrow/src/array/data.rs:486:9
   ****
   ```
   
   **Expected behavior**
   
   This should not panic


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[GitHub] [arrow-rs] alamb closed issue #1596: [Safety] Filtering Dense UnionArray Produces Invalid Offsets

[GitBox <gi...@apache.org>]

alamb closed issue #1596: [Safety] Filtering Dense UnionArray Produces Invalid Offsets
URL: https://github.com/apache/arrow-rs/issues/1596


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