[ARROW-13437] [C++] Slice of FixedSizeList fails ValidateFull

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 4.0.1
• Fix Version/s: 6.0.0
• Component/s: C++
• Labels: pull-request-available
• External issue URL: https://github.com/apache/arrow/issues/29104
• Assignee: David Li
• Reporter: David Li
• Created: 22/Jul/21 18:20
• Updated: 11/Jan/23 08:33
• Resolved: 26/Jul/21 14:35

Description

>>> arr = pa.array([["a", "b"], None, ["c", "d"]], pa.list_(pa.string(), 2))
>>> arr.validate(full=True)
>>> arr.slice(0, 1).validate(full=True)
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "pyarrow/array.pxi", line 1219, in pyarrow.lib.Array.validate
  File "pyarrow/error.pxi", line 97, in pyarrow.lib.check_status
pyarrow.lib.ArrowInvalid: Values length (6) is not equal to the length (1) multiplied by the value size (2)

Came up while looking at ARROW-13222. I'm not sure of the check here is necessarily valid, given slicing; it should perhaps only check that values length >= length * value_size, not that they're exactly equal.

Issue Links

• links to: GitHub Pull Request #10783