"Glen Choo via GitGitGadget" [off-list ref] writes:

As promised, this version addresses the comments on v3.

= Changes since v4

- Squash 6-7/12 since `test_must_fail` doesn't catch BUG()
- Move a hunk to later in the series where it belongs
- Replace a memcpy with `*a = *b`

= Changes since v3

- Rebase onto newer 'master'
- Move the 'remove UNUSED from tr2_cfg_cb' hunk from 9/12 -> 8/12. It should
  have been there all along; v3 8/12 didn't build at all.

Looks like all my comments have been addressed, so this patch set looks
good to me.