Zhuo Peng created ARROW-9037:
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Summary: [C++/C-ABI] unable to import array with null count == -1
(which could be exported)
Key: ARROW-9037
URL: https://issues.apache.org/jira/browse/ARROW-9037
Project: Apache Arrow
Issue Type: Bug
Components: C++
Affects Versions: 0.17.1
Reporter: Zhuo Peng
If an Array is created with null_count == -1 but without any null (and thus no
null bitmap buffer), then ArrayData.null_count will remain -1 when exporting if
null_count is never computed. The exported C struct also has null_count == -1
[1]. But when importing, if null_count != 0, an error [2] will be raised.
[1]
https://github.com/apache/arrow/blob/5389008df0267ba8d57edb7d6bb6ec0bfa10ff9a/cpp/src/arrow/c/bridge.cc#L560
[2]
https://github.com/apache/arrow/blob/5389008df0267ba8d57edb7d6bb6ec0bfa10ff9a/cpp/src/arrow/c/bridge.cc#L1404
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