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`\polymerdelim` 问题导致 `tikz-external` 崩溃

tag-icon • tag-icon errors chemfig tikz-external
`\polymerdelim` 问题导致 `tikz-external` 崩溃

当我同时拥有tikz-external和一个chemfig分子时出错

\documentclass{standalone}
\usepackage{tikz}
\usetikzlibrary{external}

\tikzsetfigurename{figure_\arabic{part}.\arabic{section}.} % set figure names

\tikzset{external/system call={%
    lualatex \tikzexternalcheckshellescape
    --halt-on-error
    --shell-escape
    --interaction=batchmode
    --jobname "\image" "\texsource"
    % --jobname "\image" \subfilename
}}

\tikzexternalize[
    up to date check={simple}, % faster check
    figure list={true}, % generate list of figures file
    prefix={./}
] % turn externalization on/off

\usepackage{chemfig}

\begin{document}
\tikzset{external/remake next=true}

\chemfig{
    C(-[90,.5])(-[-90,.5])
    -C(-[90,.5])(-[-90,.5]Cl)
}

% Cant compile
% \chemfig{-[@{op,.25}]
%     C(-[90,.5])(-[-90,.5])
%     -C(-[90,.5])(-[-90,.5]Cl)
% -[@{cl,.75}]}
% \polymerdelim{op}{cl}

\end{document}

必须补充一点，即使在没有第二张图的情况下编译得很好，错误似乎也出现在第一个图上。可以看出，所有命令\polymerdelim{op}{cl}的行为都发生了变化。\chemfig

摘自figure_0.0.0.log（第一张图）

Runaway argument?
 
! File ended while scanning use of \tikzexternal@laTeX@collect@until@end@tikzpicture.
<inserted text> 
\par 
<*> \def\tikzexternalrealjob{main}\input{main}

来自 MS-SPO

取消注释该部分时，错误消息可能是% Cant compile：

! Package tikz Error: Sorry, the system call 'lualatex -shell-escape --halt-on-
error --shell-escape --interaction=batchmode --jobname "./figure_0.0.0" "\def\t
ikzexternalrealjob{externalChemfig}\input{externalChemfig}"' did NOT result in
a usable output file './figure_0.0.0' (expected one of .pdf:.jpg:.jpeg:.png:).
Please verify that you have enabled system calls. For pdflatex, this is 'pdflat
ex -shell-escape'. Sometimes it is also named 'write 18' or something like that
. Or maybe the command simply failed? Error messages can be found in './figure_
0.0.0.log'. If you continue now, I'll try to typeset the picture.
See the tikz package documentation for explanation.
Type H <return> for immediate help.

在下列情况下似乎没有改变：

  • 将编译从 切换pdflatex至lualatex
  • 移动chemfig包裹之前tikz

虽然它可以编译（pdflatex 和 lualatex），但此行一直被注释：

% \polymerdelim{op}{cl}

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