[jira] [Created] (ARROW-6814) [C++] Resolve compiler warnings occurred on release build

[Kenta Murata (Jira)]

Kenta Murata created ARROW-6814:
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             Summary: [C++] Resolve compiler warnings occurred on release build
                 Key: ARROW-6814
                 URL: https://issues.apache.org/jira/browse/ARROW-6814
             Project: Apache Arrow
          Issue Type: Task
          Components: C++, C++ - Gandiva
            Reporter: Kenta Murata
            Assignee: Kenta Murata


I encountered some compiler warnings on release build when I used gcc version 
7.4.0 (Ubuntu 7.4.0-1ubuntu1~18.04.1).

[https://gist.github.com/mrkn/f7739edb301988a24e9d6066410b0625]



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