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https://issues.apache.org/jira/browse/ARROW-4886?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17661908#comment-17661908
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Rok Mihevc commented on ARROW-4886:
-----------------------------------
This issue has been migrated to [issue
#21396|https://github.com/apache/arrow/issues/21396] on GitHub. Please see the
[migration documentation|https://github.com/apache/arrow/issues/14542] for
further details.
> [Rust] Inconsistent behaviour with casting sliced primitive array to list
> array
> -------------------------------------------------------------------------------
>
> Key: ARROW-4886
> URL: https://issues.apache.org/jira/browse/ARROW-4886
> Project: Apache Arrow
> Issue Type: Bug
> Components: Rust
> Affects Versions: 0.12.0
> Reporter: Neville Dipale
> Assignee: Neville Dipale
> Priority: Major
> Labels: pull-request-available
> Fix For: 0.14.0
>
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> [~csun] I was going through the C++ cast implementation to see if I've missed
> anything, and I noticed that ListCastKernel
> ([https://github.com/apache/arrow/blob/master/cpp/src/arrow/compute/kernels/cast.cc#L665])
> doesn't support casting non-zero-offset arrays. So I investigated what
> happens in Rust ARROW-4865. I found an inconsistency where inheriting the
> incoming array's offset could lead us to read invalid data.
> I tried fixing it, but found that a buffer that I expected to be invalid was
> being returned as valid, but returning invalid data.
> I've currently disabled casting primitive to array where the offset is not
> zero, and I'd like to wait for ARROW-4853 so I can see how sliced lists
> behave, and fix this inconsistency. That might only happen in 0.14, so I'm
> fine with that.
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