Antoine Pitrou created ARROW-17938:
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Summary: [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
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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