HyukjinKwon opened a new pull request, #49111: URL: https://github.com/apache/arrow/pull/49111
### Rationale for this change Previously, `DataType::field(int i)` directly accessed `children_[i]` without bounds checking, resulting in undefined behavior for out-of-bounds indices. This could crash or return garbage. ### What changes are included in this PR? Added bounds checking to `DataType::field()` to return `nullptr` for out-of-bounds access, matching the behavior of `GetFieldByName()`. ### Are these changes tested? Yes, added `TestStructType.FieldAccessOutOfBounds` to verify that out-of-bounds indices return `nullptr`. ### Are there any user-facing changes? Yes. `DataType::field(i)` now safely returns `nullptr` for invalid indices instead of undefined behavior. -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
