[ARROW-15960] [Python] Segfault constructing a fixed size list array of size 0 with dictionary values

• Type: Bug
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 8.0.0
• Component/s: Python
• Labels: good-second-issue pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/31386
• Assignee: Antoine Pitrou
• Reporter: Joris Van den Bossche
• Created: 17/Mar/22 13:24
• Updated: 11/Jan/23 11:40
• Resolved: 22/Mar/22 18:00

Description

The following example constructing a FixedSizeList array with list size 0 and dictionary values from an explicit None value (extracted from a segfaulting hypothesis test) crashes:

pa.array([None], pa.list_(pa.dictionary(pa.int32(), pa.string()), 0))

Issue Links

• links to: GitHub Pull Request #12690