AdamGS opened a new issue, #7828:
URL: https://github.com/apache/arrow-rs/issues/7828
**Describe the bug**
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A clear and concise description of what the bug is.
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Calling `concat` on StructArrays with no fields will always error
**To Reproduce**
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Steps to reproduce the behavior:
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```rust
let s1 = StructArray::new_empty_fields(10, None);
let s2 = StructArray::new_empty_fields(10, None);
let arr = concat(&[&s1, &s2]).unwrap();
```
**Expected behavior**
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A clear and concise description of what you expected to happen.
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Return a struct array with no fields and the correct nulls and length.
**Additional context**
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Add any other context about the problem here.
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