我想将todonotes-package 与\includegraphics[]{}-command 一起使用。它对文本和图形都很好用，但编译后我还是收到两个错误：
\reserved@a 的参数有一个额外的}。
\par l.9 ...includegraphics[scale=1.3]{grafik/example}} 我遇到了刚刚插入的
}' that doesn't seem to match anything. For example,\def\a#1{...}' 和\a}' would produce this error. If you simply proceed now, the\par'，它们会导致我报告失控参数，这可能是问题的根源。但如果使用}' was spurious, just type2'，它就会消失。失控的争论？
{@firstoftwo {\Gin@cliptrue \Gin@i }}\def \reserved@b {\Gin@clipfalse \ETC. ! 段落在 \reserved@a 完成之前结束。 \par l.9 ...includegraphics[scale=1.3]{grafik/example}} 我怀疑您忘记了 `}'，导致我将这个控制序列应用于太多文本。我们该如何恢复？我的计划是忘记整件事并希望一切顺利。
所以它告诉我同时多了一个}和少了一个}？事实上输出的 pdf 没问题，但无论如何，我想知道如何避免错误。有没有其他方法可以在页面侧面用图片来实现注释？
\documentclass{article}
\usepackage[colorinlistoftodos,prependcaption,textsize=footnotesize,color=black!20,linecolor=black!20,bordercolor=white,backgroundcolor=white]{todonotes}
\usepackage{tikzducks}
\begin{document}
One morning, when Gregor Samsa woke from
\todo{hallo}
troubled dreams, he found himself transformed in his bed into a horrible vermin. He lay on his armour-like back, and if he lifted his head a little he could see his brown belly, slightly domed and divided by arches into stiff sections. The bedding was hardly able to cover it and seemed ready to slide off any moment. His many legs, pitifully thin compared with the size of the rest of him, waved about helplessly as he looked. "What's happened to me?" he thought. It wasn't a dream. His room, a proper human room although a little too small, lay peacefully between its four familiar walls.
\todo{\includegraphics[scale=.3]{example-image}}
A collection of textile samples lay spread out on the table - Samsa was a travelling salesman - and above it there hung a picture that he had recently cut out of an illustrated magazine and housed in a nice, gilded frame. It showed a lady fitted out with a fur hat and fur boa who sat upright, raising a heavy fur muff that covered the whole of her lower arm towards the viewer. Gregor then turned to look out the window at the dull weather. Drops
\end{document}
完整日志为：
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! Argument of \reserved@a has an extra }.
<inserted text>
\par
l.10 ...\includegraphics[scale=.3]{example-image}}
I've run across a `}' that doesn't seem to match anything.
For example, `\def\a#1{...}' and `\a}' would produce
this error. If you simply proceed now, the `\par' that
I've just inserted will cause me to report a runaway
argument that might be the root of the problem. But if
your `}' was spurious, just type `2' and it will go away.
Runaway argument?
{\@firstoftwo {\Gin@cliptrue \Gin@i }}\def \reserved@b {\Gin@clipfalse \ETC.
! Paragraph ended before \reserved@a was complete.
<to be read again>
\par
l.10 ...\includegraphics[scale=.3]{example-image}}
I suspect you've forgotten a `}', causing me to apply this
control sequence to too much text. How can we recover?
My plan is to forget the whole thing and hope for the best.
File: example-image.pdf Graphic file (type pdf)
<use example-image.pdf>
Overfull \hbox (39.25674pt too wide) in paragraph at lines 10--10
[][][]
[]
File: example-image.pdf Graphic file (type pdf)
<use example-image.pdf>
Overfull \hbox (39.25674pt too wide) in paragraph at lines 10--10
[][][]
[]
[1
] (./name.aux) )
Here is how much of TeX's memory you used:
12751 strings out of 492483
265525 string characters out of 6134979
355950 words of memory out of 5000000
17018 multiletter control sequences out of 15000+600000
3656 words of font info for 16 fonts, out of 8000000 for 9000
1348 hyphenation exceptions out of 8191
68i,12n,83p,977b,985s stack positions out of 5000i,500n,10000p,200000b,80000s
Output written on name.pdf (1 page).
答案1
这个错误是典型的“移动参数中的脆弱命令”错误，LaTeX\protect为这种情况提供了解决方案。
我在 texlive 2018 中遇到了错误，但如果你使用
\todo{\protect\includegraphics[scale=.3]{example-image}}
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在更新的 texlive 2019 或 texlive 2020 预测试中，问题中的原始文档没有出现任何错误。