[Python] Segmentation fault when writing empty ListType column to Parquet

[asfimport]

Context Is the following: I am currently dealing with sparse column serialization in parquet. In some cases, many lines are empty I can also have columns containing only empty lists.
However I got a segmentation fault when I try to write in parquet thoses columns filled only with empty lists.

Here is a simple code snipet reproduces the segmentation fault I had:

In [1]: import pyarrow as pa

In [2]: import pyarrow.parquet as pq

In [3]: pa_ar = pa.array([[],[]],pa.list_(pa.int32()))

In [4]: table = pa.Table.from_arrays([pa_ar],["test"])

In [5]: pq.write_table(
   ...:     table=table,
   ...:     where="test.parquet",
   ...:     compression="snappy",
   ...:     flavor="spark"
   ...: )
Segmentation fault

May I have it fixed?

Best

Jacques

Reporter: jacques
Assignee: Krisztian Szucs / @kszucs

PRs and other links:

• GitHub Pull Request #3028

_{Note: This issue was originally created as ARROW-2591. Please see the migration documentation for further details.}

[asfimport]

Wes McKinney / @wesm:

May I have it fixed?

[~jafournier] for future reference, it isn't ideal in open source projects to ask volunteers to fix bugs for you in this way. After you report the bug; if it is deemed a priority by another developer, they may fix it. Otherwise, if they do not fix it, and you need the fix sooner, we would be glad to accept a pull request.

[asfimport]

Krisztian Szucs / @kszucs:
Issue resolved by pull request 3028
#3028

[asfimport]

jacques:
many thanks!