Global coffin inconsistent local/global assignment

[blefloch]

As it turns out, \vcoffin_gset:Nnn shares an auxiliary with the local version, and both use under the hood \prop_put:Nnn to set coffin poles. This trips up the l3debug check-declarations code, which produces the (correct) error Inconsistent local/global assignment. Presumably the poles are then lost at the end of the group, but I didn't track that carefully.

\documentclass{article}
\ExplSyntaxOn
\debug_on:n { check-declarations }
\ExplSyntaxOff
\begin{document}
\ExplSyntaxOn
\vcoffin_gset:Nnn \g_tmpa_coffin { 10pt } { XXX } % gives the error
\coffin_typeset:Nnnnn \g_tmpa_coffin { t } { l } { 0pt } { 0pt }
\ExplSyntaxOff
\end{document}

[josephwright]

Isn't this addressed by 08347a0?

[blefloch]

Yes, indeed, thanks! I came across the problem when working on my #1059 pull request, in a branch that is 30 commits behind main.