csquotes package incompatible with phase-II and phase-III

[AlphaJack]

I am using TeX Live 2023 (packages updates are frozen to March 2023).

I cannot compile a document that loads csquotes if I set testphase=phase-II or testphase=phase-III in \DocumentMetadata{}

I am compiling the following MWE twice with lualatex --synctex=1 --interaction=nonstopmode --file-line-error csquotes.tex:

\DocumentMetadata{
 % does not work
 %testphase=phase-III,
 testphase=phase-II,
 % works
 %testphase=phase-I,
 pdfversion=2.0,
 pdfstandard=A-4
}

\documentclass[a4paper,10pt]{article}

\usepackage{csquotes}

\begin{document}

\section{First section}
Section text

\blockquote{Random sentence}

\end{document}

Output for phase-II:

This is LuaHBTeX, Version 1.17.0 (TeX Live 2023/Arch Linux) 
 restricted system commands enabled.
(./csquotes.tex
LaTeX2e <2022-11-01> patch level 1
 L3 programming layer <2023-02-22>
(/usr/share/texmf-dist/tex/latex/latex-lab/documentmetadata-support.ltx
(/usr/share/texmf-dist/tex/latex/pdfmanagement-testphase/pdfmanagement-testphas
e.sty (/usr/share/texmf-dist/tex/latex/tagpdf/tagpdf-base.sty)
(/usr/share/texmf-dist/tex/latex/pdfmanagement-testphase/pdfmanagement-testphas
e.ltx (/usr/share/texmf-dist/tex/latex/l3experimental/l3bitset/l3bitset.sty))))
 (/usr/share/texmf-dist/tex/latex/l3backend/l3backend-luatex.def)
(/usr/share/texmf-dist/tex/latex/pdfmanagement-testphase/l3backend-testphase-lu
atex.def (/usr/share/texmf-dist/tex/latex/pdfmanagement-testphase/l3ref-tmp.sty
)) (/usr/share/texmf-dist/tex/latex/latex-lab/phase-II-latex-lab-testphase.ltx
(/usr/share/texmf-dist/tex/latex/latex-lab/latex-lab-testphase-new-or.sty
(/usr/share/texmf-dist/tex/latex/latex-lab/latex-lab-footnotes.ltx))
(/usr/share/texmf-dist/tex/latex/tagpdf/tagpdf.sty
(/usr/share/texmf-dist/tex/latex/tagpdf/tagpdf-luatex.def)
(/usr/share/texmf-dist/tex/latex/tagpdf/tagpdf-mc-code-lua.sty)))
(/usr/share/texmf-dist/tex/latex/pdfmanagement-testphase/pdfmanagement-firstaid
.sty) (/usr/share/texmf-dist/tex/latex/base/article.cls
Document Class: article 2022/07/02 v1.4n Standard LaTeX document class
(/usr/share/texmf-dist/tex/latex/base/size10.clo))
(/usr/share/texmf-dist/tex/latex/csquotes/csquotes.sty
(/usr/share/texmf-dist/tex/latex/etoolbox/etoolbox.sty)
(/usr/share/texmf-dist/tex/latex/graphics/keyval.sty)
(/usr/share/texmf-dist/tex/latex/csquotes/csquotes.def)
(/usr/share/texmf-dist/tex/latex/csquotes/csquotes.cfg))
(/usr/share/texmf-dist/tex/latex/pdfmanagement-testphase/output-patches-tmp-ltx
.sty
Patching header in \@outputpage
Patching footer in \@outputpage
)
No file csquotes.aux.
(/usr/share/texmf-dist/tex/latex/base/ts1cmr.fd)<<sRGB.icc>>

./csquotes.tex:20: LaTeX Error: Control sequence \g__tag_struct_6_prop already 
defined.

For immediate help type H <return>.
 ...                                              

l.20 \blockquote{Random sentence}

./csquotes.tex:20: LaTeX Error: Control sequence \__tag_struct_output_prop_6:n 
already defined.

For immediate help type H <return>.
 ...                                              

l.20 \blockquote{Random sentence}

./csquotes.tex:20: LaTeX Error: Control sequence \g__tag_struct_kids_6_seq alre
ady defined.

For immediate help type H <return>.
 ...                                              

l.20 \blockquote{Random sentence}

./csquotes.tex:20: LaTeX Error: Control sequence \c__pdf_object___tag/struct/6_
int already
(LaTeX)        defined.

For immediate help type H <return>.
 ...                                              

l.20 \blockquote{Random sentence}

./csquotes.tex:20: LaTeX Error: Control sequence \c__pdf_backend_object___tag/s
truct/6_int
(LaTeX)        already defined.

For immediate help type H <return>.
 ...                                              

l.20 \blockquote{Random sentence}

./csquotes.tex:20: LaTeX Error: Control sequence \g__tag_struct_7_prop already 
defined.

For immediate help type H <return>.
 ...                                              

l.20 \blockquote{Random sentence}

./csquotes.tex:20: LaTeX Error: Control sequence \__tag_struct_output_prop_7:n 
already defined.

For immediate help type H <return>.
 ...                                              

l.20 \blockquote{Random sentence}

./csquotes.tex:20: LaTeX Error: Control sequence \g__tag_struct_kids_7_seq alre
ady defined.

For immediate help type H <return>.
 ...                                              

l.20 \blockquote{Random sentence}

./csquotes.tex:20: LaTeX Error: Control sequence \c__pdf_object___tag/struct/7_
int already
(LaTeX)        defined.

For immediate help type H <return>.
 ...                                              

l.20 \blockquote{Random sentence}

./csquotes.tex:20: LaTeX Error: Control sequence \c__pdf_backend_object___tag/s
truct/7_int
(LaTeX)        already defined.

For immediate help type H <return>.
 ...                                              

l.20 \blockquote{Random sentence}

[1{/var/lib/texmf/fonts/map/pdftex/updmap/pdftex.map}] (./csquotes.aux))
(see the transcript file for additional information)
 422 words of node memory still in use:
   3 hlist, 1 vlist, 1 rule, 2 glue, 3 kern, 2 glyph, 5 attribute, 49 glue_spec
, 5 attribute_list, 1 write nodes
   avail lists: 1:1,2:106,3:54,4:6,5:23,6:6,7:170,9:32,11:8
</usr/share/texmf-dist/fonts/opentype/public/lm/lmroman10-regular.otf></usr/sha
re/texmf-dist/fonts/opentype/public/lm/lmroman12-bold.otf>
Output written on csquotes.pdf (1 page, 24727 bytes).
SyncTeX written on csquotes.synctex.gz.
Transcript written on csquotes.log.

Output for phase-III:

This is LuaHBTeX, Version 1.17.0 (TeX Live 2023/Arch Linux) 
 restricted system commands enabled.
(./csquotes.tex
LaTeX2e <2022-11-01> patch level 1
 L3 programming layer <2023-02-22>
(/usr/share/texmf-dist/tex/latex/latex-lab/documentmetadata-support.ltx
(/usr/share/texmf-dist/tex/latex/pdfmanagement-testphase/pdfmanagement-testphas
e.sty (/usr/share/texmf-dist/tex/latex/tagpdf/tagpdf-base.sty)
(/usr/share/texmf-dist/tex/latex/pdfmanagement-testphase/pdfmanagement-testphas
e.ltx (/usr/share/texmf-dist/tex/latex/l3experimental/l3bitset/l3bitset.sty))))
 (/usr/share/texmf-dist/tex/latex/l3backend/l3backend-luatex.def)
(/usr/share/texmf-dist/tex/latex/pdfmanagement-testphase/l3backend-testphase-lu
atex.def (/usr/share/texmf-dist/tex/latex/pdfmanagement-testphase/l3ref-tmp.sty
))
(/usr/share/texmf-dist/tex/latex-dev/latex-lab/phase-III-latex-lab-testphase.lt
x (/usr/share/texmf-dist/tex/latex/latex-lab/phase-II-latex-lab-testphase.ltx
(/usr/share/texmf-dist/tex/latex/latex-lab/latex-lab-testphase-new-or.sty
(/usr/share/texmf-dist/tex/latex/latex-lab/latex-lab-footnotes.ltx))
(/usr/share/texmf-dist/tex/latex/tagpdf/tagpdf.sty
(/usr/share/texmf-dist/tex/latex/tagpdf/tagpdf-luatex.def)
(/usr/share/texmf-dist/tex/latex/tagpdf/tagpdf-mc-code-lua.sty)))
(/usr/share/texmf-dist/tex/latex-dev/latex-lab/latex-lab-testphase-block-taggin
g.sty (/usr/share/texmf-dist/tex/latex/l3packages/xtemplate/xtemplate.sty
(/usr/share/texmf-dist/tex/latex/l3kernel/expl3.sty))
(/usr/share/texmf-dist/tex/latex-dev/latex-lab/latex-lab-kernel-changes.sty
(/usr/share/texmf-dist/tex/generic/pdftex/glyphtounicode.tex)
(/usr/share/texmf-dist/tex/latex-dev/latex-lab/glyphtounicode-cmex.tex)))
(/usr/share/texmf-dist/tex/latex-dev/latex-lab/latex-lab-testphase-sec-tagging.
sty)
(/usr/share/texmf-dist/tex/latex-dev/latex-lab/latex-lab-testphase-toc-tagging.
sty))
(/usr/share/texmf-dist/tex/latex/pdfmanagement-testphase/pdfmanagement-firstaid
.sty) (/usr/share/texmf-dist/tex/latex/base/article.cls
Document Class: article 2022/07/02 v1.4n Standard LaTeX document class
(/usr/share/texmf-dist/tex/latex/base/size10.clo))
(/usr/share/texmf-dist/tex/latex/csquotes/csquotes.sty
(/usr/share/texmf-dist/tex/latex/etoolbox/etoolbox.sty)
(/usr/share/texmf-dist/tex/latex/graphics/keyval.sty)
(/usr/share/texmf-dist/tex/latex/csquotes/csquotes.def)
(/usr/share/texmf-dist/tex/latex/csquotes/csquotes.cfg))
(/usr/share/texmf-dist/tex/latex/pdfmanagement-testphase/output-patches-tmp-ltx
.sty
Patching header in \@outputpage
Patching footer in \@outputpage
)
No file csquotes.aux.
(/usr/share/texmf-dist/tex/latex/base/ts1cmr.fd)<<sRGB.icc>>

./csquotes.tex:20: LaTeX Error: Control sequence \g__tag_struct_7_prop already 
defined.

For immediate help type H <return>.
 ...                                              

l.20 \blockquote{Random sentence}

./csquotes.tex:20: LaTeX Error: Control sequence \__tag_struct_output_prop_7:n 
already defined.

For immediate help type H <return>.
 ...                                              

l.20 \blockquote{Random sentence}

./csquotes.tex:20: LaTeX Error: Control sequence \g__tag_struct_kids_7_seq alre
ady defined.

For immediate help type H <return>.
 ...                                              

l.20 \blockquote{Random sentence}

./csquotes.tex:20: LaTeX Error: Control sequence \c__pdf_object___tag/struct/7_
int already
(LaTeX)        defined.

For immediate help type H <return>.
 ...                                              

l.20 \blockquote{Random sentence}

./csquotes.tex:20: LaTeX Error: Control sequence \c__pdf_backend_object___tag/s
truct/7_int
(LaTeX)        already defined.

For immediate help type H <return>.
 ...                                              

l.20 \blockquote{Random sentence}

./csquotes.tex:20: LaTeX Error: Control sequence \g__tag_struct_8_prop already 
defined.

For immediate help type H <return>.
 ...                                              

l.20 \blockquote{Random sentence}

./csquotes.tex:20: LaTeX Error: Control sequence \__tag_struct_output_prop_8:n 
already defined.

For immediate help type H <return>.
 ...                                              

l.20 \blockquote{Random sentence}

./csquotes.tex:20: LaTeX Error: Control sequence \g__tag_struct_kids_8_seq alre
ady defined.

For immediate help type H <return>.
 ...                                              

l.20 \blockquote{Random sentence}

./csquotes.tex:20: LaTeX Error: Control sequence \c__pdf_object___tag/struct/8_
int already
(LaTeX)        defined.

For immediate help type H <return>.
 ...                                              

l.20 \blockquote{Random sentence}

./csquotes.tex:20: LaTeX Error: Control sequence \c__pdf_backend_object___tag/s
truct/8_int
(LaTeX)        already defined.

For immediate help type H <return>.
 ...                                              

l.20 \blockquote{Random sentence}

[1{/var/lib/texmf/fonts/map/pdftex/updmap/pdftex.map}] (./csquotes.aux))
(see the transcript file for additional information)
 437 words of node memory still in use:
   3 hlist, 1 vlist, 1 rule, 2 glue, 3 kern, 2 glyph, 5 attribute, 52 glue_spec
, 5 attribute_list, 1 write nodes
   avail lists: 1:1,2:122,3:58,4:6,5:89,6:6,7:172,9:36,11:8
</usr/share/texmf-dist/fonts/opentype/public/lm/lmroman10-regular.otf></usr/sha
re/texmf-dist/fonts/opentype/public/lm/lmroman12-bold.otf>
Output written on csquotes.pdf (1 page, 25198 bytes).
SyncTeX written on csquotes.synctex.gz.
Transcript written on csquotes.log.

[u-fischer]

I'm sorry but there is no easy fix. This is a long term issue. csquotes measures the length of the quote and manipulates \par and this confuses the structure. So you will have to avoid the blockquote command for now.

[AlphaJack]

Thank you. As you said the problem is just with \blockquote, \textquote and the displayquote environment work fine.