[ARROW-6857] [Python][C++] Segfault for dictionary_encode on empty chunked_array (edge case)

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.15.0
• Fix Version/s: 0.15.1, 0.16.0
• Component/s: Python
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/23186
• Assignee: Antoine Pitrou
• Reporter: Artem KOZHEVNIKOV
• Created: 11/Oct/19 14:50
• Updated: 11/Jan/23 07:49
• Resolved: 14/Oct/19 21:14

Description

a reproducer is here :

import pyarrow as pa
aa = pa.chunked_array([pa.array(['a', 'b', 'c'])])
aa[:0].dictionary_encode()  
# Segmentation fault: 11

For pyarrow=0.14, I could not reproduce.
I use a conda version : "pyarrow 0.15.0 py37hdca360a_0 conda-forge"

Issue Links

• links to: GitHub Pull Request #5650