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https://issues.apache.org/jira/browse/ARROW-11767?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Ben Kietzman resolved ARROW-11767.
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Resolution: Fixed
Issue resolved by pull request 9562
[https://github.com/apache/arrow/pull/9562]
> [C++] Scalar::hash may segfault for null scalars
> ------------------------------------------------
>
> Key: ARROW-11767
> URL: https://issues.apache.org/jira/browse/ARROW-11767
> Project: Apache Arrow
> Issue Type: Bug
> Components: C++
> Affects Versions: 3.0.0
> Reporter: Ben Kietzman
> Assignee: Ben Kietzman
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Scalar::Hash does not check Scalar::is_valid, which can result in
> inconsistent hashes when applied to uninitialized {{/.*Scalar::value/}} or
> may segfault (since null binary scalars may have a null buffer).
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