☰

（已修复）缺失字符：更新 latex 包后，字体 nullfont! 中没有 ( ("28)

tag-icon • tag-icon tikz-pgf tkz-euclide
（已修复）缺失字符：更新 latex 包后，字体 nullfont! 中没有 ( ("28)

更新：该问题已在 tkz-euclide ver. 4.00 中修复。

原帖：
最近更新 texlive 软件包后（2021/11/15），我发现使用 tkz-euclide 时出现了一些奇怪的警告，以前没有出现过这种情况

女士：

\documentclass{standalone}
\usepackage{tkz-euclide}
\begin{document}
\begin{tikzpicture}
  \tkzDefPoint(0,0){O}
  \tkzDefPoint(1,0){P}
  \tkzDefLine[orthogonal=through P](P,O)
\end{tikzpicture}
\end{document}

输出：

Command Line:   xelatex.exe --interaction=errorstopmode --synctex=-1 "testmini.tex"
Startup Folder: D:\TeXTemp\TeXAux

This is XeTeX, Version 3.141592653-2.6-0.999993 (TeX Live 2021/W32TeX) (preloaded format=xelatex)
 restricted \write18 enabled.
entering extended mode
(d:/TeXTemp/testmini.tex
LaTeX2e <2021-11-15>
L3 programming layer <2021-11-12>
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Document Class: standalone 2018/03/26 v1.3a Class to compile TeX sub-files stan
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2020/03/18 3.06c tkz-obj-eu-triangles.tex
)) (./testmini.aux) (c:/texlive/2021/texmf-dist/tex/latex/base/ts1cmr.fd)
Missing character: There is no ( ("28) in font nullfont!
Missing character: There is no P ("50) in font nullfont!
Missing character: There is no ) ("29) in font nullfont!
[1] [2] (./testmini.aux) )
Output written on testmini.pdf (2 pages).
SyncTeX written on testmini.synctex.

Transcript written on testmini.log.

更新的软件包： 在此处输入图片描述

答案1

正如 Ulrike 所评论的那样，警告以前也存在，但只出现在日志文件中，latex 增加了默认值，\tracinglostchars以便缺失字符警告更加明显。（在实际情况下，它会导致结果中缺少文本，尽管这里是虚假的路径解析错误）

\tkz@DefLine实际的根本错误似乎是in的定义tkz-euclide，它插入了第二个 () 组，之后\tkzDefOrthLine仅定义为采用一个这样的组：

\def\tkz@DefOrthLine[#1](#2,#3){% ...

因此删除第二个 () 会产生警告，但我无法弄清楚预期的定义是什么。（此时#2也是P,O不(#2,\tkz@through)正确的）。

\documentclass{standalone}
\usepackage{tkz-euclide}
\makeatletter
\def\tkz@DefLine[#1](#2){% 
\begingroup
\pgfkeys{/tkzDefLine/.cd,K=1}  
\pgfqkeys{/tkzDefLine}{#1}  
\ifcase\tkz@numl%
 % first case 0
 \tkzDefMediatorLine(#2)  
  \or% 1
  \tkzDefOrthLine[\tkz@koeff](#2)% this makes a warning (\tkz@through)  
  \or% 2
   \tkzDefLineLL(#2)
  \or% 3
  \tkzDefBisectorLine(#2)
  \or% 4
  \tkzDefBisectorOutLine(#2)
  \or% 5
  \tkzDefSymmedianLine(#2)
  \fi    
\endgroup
}

\begin{document}

aaa\fbox{\begin{tikzpicture}
  \tkzDefPoint(0,0){O}
  \tkzDefPoint(1,0){P}
  \tkzDefLine[orthogonal=through P](P,O)
\end{tikzpicture}}
\end{document}

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