[ARROW-12672] [C++] Segfault casting result of "fill_null()" (not bitmap but unknown null_count)

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.0.0
• Fix Version/s: 5.0.0
• Component/s: Python
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/28420
• Assignee: Joris Van den Bossche
• Reporter: Adam Hooper
• Created: 06/May/21 18:17
• Updated: 11/Jan/23 08:27
• Resolved: 08/May/21 11:01

Description

The array returned by pa.Array.fill_null() is unusable.

>>> import pyarrow as pa
>>> arr = pa.array([None], pa.bool_()).fill_null(False)
>>> arr.cast(pa.int8())
Segmentation fault (core dumped)

Issue Links

• links to: GitHub Pull Request #10263