[ARROW-10578] [C++] Comparison kernels crashing for string array with null string scalar

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 3.0.0
• Component/s: C++
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/18369
• Assignee: Kirill Lykov
• Reporter: Joris Van den Bossche
• Created: 13/Nov/20 09:19
• Updated: 11/Jan/23 08:14
• Resolved: 05/Jan/21 09:21

Description

Comparing a string array with a string scalar works:

In [1]: import pyarrow.compute as pc

In [2]: pc.equal(pa.array(["a", None, "b"]), pa.scalar("a", type="string"))
Out[2]: 
<pyarrow.lib.BooleanArray object at 0x7f38d56e23a8>
[
  true,
  null,
  false
]

but if the scalar is a null (from the proper string type), it crashes:

In [4]: pc.equal(pa.array(["a", None, "b"]), pa.scalar(None, type="string"))
Segmentation fault (core dumped)

(and not even debug messages ..)

Issue Links

• links to: GitHub Pull Request #9079