Zhuo Peng created ARROW-9071: -------------------------------- Summary: [C++] MakeArrayOfNull makes invalid ListArray Key: ARROW-9071 URL: https://issues.apache.org/jira/browse/ARROW-9071 Project: Apache Arrow Issue Type: Bug Components: C++, Python Reporter: Zhuo Peng
One way to reproduce this bug is: >>> a = pa.array([[1, 2]]) >>> b = pa.array([None, None], type=pa.null()) >>> t1 = pa.Table.from_arrays([a], ["a"]) >>> t2 = pa.Table.from_arrays([b], ["b"]) >>> pa.concat_tables([t1, t2], promote=True) Traceback (most recent call last): File "<stdin>", line 1, in <module> File "pyarrow/table.pxi", line 2138, in pyarrow.lib.concat_tables File "pyarrow/public-api.pxi", line 390, in pyarrow.lib.pyarrow_wrap_table File "pyarrow/error.pxi", line 85, in pyarrow.lib.check_status pyarrow.lib.ArrowInvalid: Column 0: In chunk 1: Invalid: List child array invalid: Invalid: Buffer #1 too small in array of type int64 and length 2: expected at least 16 byte(s), got 12 (because concat_tables(promote=True) will call MakeArrayOfNulls ([https://github.com/apache/arrow/blob/ec3bae18157723411bb772fca628cbd02eea5c25/cpp/src/arrow/table.cc#L647))|https://github.com/apache/arrow/blob/ec3bae18157723411bb772fca628cbd02eea5c25/cpp/src/arrow/table.cc#L647)'] The code here seems incorrect: [https://github.com/apache/arrow/blob/ec3bae18157723411bb772fca628cbd02eea5c25/cpp/src/arrow/array/util.cc#L218] the length of the child array of a ListArray may not equal to the length of the ListArray. -- This message was sent by Atlassian Jira (v8.3.4#803005)