[jira] [Created] (ARROW-16845) [C++] ArraySpan::IsNull/IsValid implementations are incorrect for union types

[Wes McKinney (Jira)]

Wes McKinney created ARROW-16845:
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             Summary: [C++] ArraySpan::IsNull/IsValid implementations are 
incorrect for union types
                 Key: ARROW-16845
                 URL: https://issues.apache.org/jira/browse/ARROW-16845
             Project: Apache Arrow
          Issue Type: Bug
          Components: C++
            Reporter: Wes McKinney
             Fix For: 9.0.0


Because the first buffer is not a validity bitmap. Follow up work from 
ARROW-16756



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