[jira] [Resolved] (ARROW-17938) [Python][CI] python_test.cc build failure

["Antoine Pitrou (Jira)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/ARROW-17938?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Antoine Pitrou resolved ARROW-17938.
------------------------------------
    Fix Version/s: 10.0.0
       Resolution: Fixed

Issue resolved by pull request 14321
[https://github.com/apache/arrow/pull/14321]

> [Python][CI] python_test.cc build failure
> -----------------------------------------
>
>                 Key: ARROW-17938
>                 URL: https://issues.apache.org/jira/browse/ARROW-17938
>             Project: Apache Arrow
>          Issue Type: Bug
>          Components: Continuous Integration, Python
>            Reporter: Antoine Pitrou
>            Assignee: Antoine Pitrou
>            Priority: Major
>             Fix For: 10.0.0
>
>
> Just saw this on Crossbow CI, for example on the {{conda-linux-gcc-py39-cuda}} job:
> {code}
> 2022-10-04T12:24:11.3370140Z /build/arrow-cpp-ext_1664884270503/work/python/pyarrow/src/python_test.cc:116:5:   required from here
> 2022-10-04T12:24:11.3372155Z /build/arrow-cpp-ext_1664884270503/_h_env_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_placehold_pla/include/arrow/util/string_builder.h:49:10: error: ambiguous overload for 'operator<<' (operand types are 'std::ostream {aka std::basic_ostream<char>}' and 'std::nullptr_t')
> 2022-10-04T12:24:11.3373600Z    stream << head;
> 2022-10-04T12:24:11.3374077Z    ~~~~~~~^~~~~~~
> {code}



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