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Undefined control sequence M@currentTitle #6716

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intractabilis opened this issue Nov 30, 2023 · 5 comments
Open

Undefined control sequence M@currentTitle #6716

intractabilis opened this issue Nov 30, 2023 · 5 comments

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@intractabilis
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The document uses an undocumented command from the Memoir class, \M@currentTitle. This command is not present in the version of The Memoir Class available on CTAN. The older versions of the class are not available on CTAN. An attempt to compile the document ends up with

! Undefined control sequence.
\customlabel ...tleReference {#2}{\M@currentTitle 
                                                  }}\MNR@label {#1}\endgroup...
l.3 \rSec0[intro.scope]{Scope}
@top-sekret
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I can confirm this issue. I run Debian sid, with TeXLive 20231207 and I get the exact same error. Using the Docker image texlive/texlive:latest-full I also get the exact same error. The Docker image texlive/texlive:TL2022-historic seems to work, so this may be a recent issue.

@tkoeppe
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tkoeppe commented Dec 17, 2023

Pull requests welcome!

@intractabilis
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I would gladly create a PR, if someone explains what that customLabel is supposed to do. \M@currentTitle is not documented, so it's hard to guess, and the previous version of The Memoir Class is not available on CTAN.

@tkoeppe
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tkoeppe commented Dec 17, 2023

It's used for this trick here:

draft/source/macros.tex

Lines 79 to 86 in 64ad91d

% Set the xref label for a clause to be "Clause n", not just "n".
\makeatletter
\newcommand{\customlabel}[2]{%
\@bsphack \begingroup \protected@edef \@currentlabel {\protect \M@TitleReference{#2}{\M@currentTitle}}\MNR@label{#1}\endgroup \@esphack%
}
\makeatother
\newcommand{\clauselabel}[1]{\customlabel{#1}{Clause \thechapter}}
\newcommand{\annexlabel}[1]{\customlabel{#1}{Annex \thechapter}}

@intractabilis
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I haven't touched anything yet, but I see hundreds of new undefined control sequence messages. It's a nightmare. I pass.

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@tkoeppe @top-sekret @intractabilis