[C++][Gandiva] Calling castVarchar from java sometimes results in segmentation fault for input length 0
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Component: C++
Component: Gandiva
Type: bug
- Dominant language
- C++
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Description
**Reporter**: [Projjal Chanda](https://issues.apache.org/jira/browse/ARROW-7589) / @projjal
#### PRs and other links:
- [GitHub Pull Request #6210](https://github.com/apache/arrow/pull/6210)
**Note**: *This issue was originally created as [ARROW-7589](https://issues.apache.org/jira/browse/ARROW-7589). Please see the [migration documentation](https://github.com/apache/arrow/issues/14542) for further details.*
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