GH-47000: [R] concat_tables on a record_batch causes segfault

[thisisnic]

Rationale for this change

Segfault due to combining recordbatches in concat_tables

What changes are included in this PR?

Convert to tables before combining

Are these changes tested?

Yes

Are there any user-facing changes?

No

• GitHub Issue: [R] concat_tables on a record_batch causes segfault #47000

[github-actions]

⚠️ GitHub issue #47000 has been automatically assigned in GitHub to PR creator.

[jonkeane]

Thanks for this. I'm not sure the answer is yes (or no!), but do we need to mention this in the docs for concat_tables()?

[thisisnic]

Thanks for this. I'm not sure the answer is yes (or no!), but do we need to mention this in the docs for concat_tables()?

I think we should, so I have, thanks for flagging!