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使用小写字母会导致字符缺失

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使用小写字母会导致字符缺失

由于某种原因，使用小写字母\textsc{}会导致字符丢失。例如，以下代码：

\documentclass[12pt]{article}
\begin{document}

\textsc{Hello world}

Hello world

\end{document}

呈现为：

埃洛世界

但一旦我删除小型大写字母，它就会正常呈现：

\documentclass[12pt]{article}
\begin{document}

% \textsc{Hello world}

Hello world

\end{document}

你好世界

我曾尝试使用\usepackage[T1]{fontenc}，但没有什么区别。

日志文件如下所示：

This is pdfTeX, Version 3.141592653-2.6-1.40.22 (TeX Live 2021) (preloaded format=pdflatex 2021.9.1)  19 JUN 2022 13:01
entering extended mode
 restricted \write18 enabled.
 %&-line parsing enabled.
LaTeX2e <2020-10-01> patch level 4
L3 programming layer <2021-02-18>
(/usr/local/texlive/2021/texmf-dist/tex/latex/base/article.cls
Document Class: article 2020/04/10 v1.4m Standard LaTeX document class
(/usr/local/texlive/2021/texmf-dist/tex/latex/base/size12.clo
File: size12.clo 2020/04/10 v1.4m Standard LaTeX file (size option)
)
\c@part=\count179
\c@section=\count180
\c@subsection=\count181
\c@subsubsection=\count182
\c@paragraph=\count183
\c@subparagraph=\count184
\c@figure=\count185
\c@table=\count186
\abovecaptionskip=\skip47
\belowcaptionskip=\skip48
\bibindent=\dimen138
)
(/usr/local/texlive/2021/texmf-dist/tex/latex/l3backend/l3backend-pdftex.def
File: l3backend-pdftex.def 2021-03-18 L3 backend support: PDF output (pdfTeX)
\l__color_backend_stack_int=\count187
\l__pdf_internal_box=\box47
)
(./test.aux)
\openout1 = `test.aux'.

LaTeX Font Info:    Checking defaults for OML/cmm/m/it on input line 2.
LaTeX Font Info:    ... okay on input line 2.
LaTeX Font Info:    Checking defaults for OMS/cmsy/m/n on input line 2.
LaTeX Font Info:    ... okay on input line 2.
LaTeX Font Info:    Checking defaults for OT1/cmr/m/n on input line 2.
LaTeX Font Info:    ... okay on input line 2.
LaTeX Font Info:    Checking defaults for T1/cmr/m/n on input line 2.
LaTeX Font Info:    ... okay on input line 2.
LaTeX Font Info:    Checking defaults for TS1/cmr/m/n on input line 2.
LaTeX Font Info:    ... okay on input line 2.
LaTeX Font Info:    Checking defaults for OMX/cmex/m/n on input line 2.
LaTeX Font Info:    ... okay on input line 2.
LaTeX Font Info:    Checking defaults for U/cmr/m/n on input line 2.
LaTeX Font Info:    ... okay on input line 2.
 [1

{/usr/local/texlive/2021/texmf-var/fonts/map/pdftex/updmap/pdftex.map}] (./test
.aux) ) 
Here is how much of TeX's memory you used:
 383 strings out of 478994
 6892 string characters out of 5858185
 289938 words of memory out of 5000000
 17948 multiletter control sequences out of 15000+600000
 404029 words of font info for 29 fonts, out of 8000000 for 9000
 1141 hyphenation exceptions out of 8191
 44i,4n,50p,169b,100s stack positions out of 5000i,500n,10000p,200000b,80000s
</usr/local/texlive/2021/texmf-dist/fonts/type1/public/amsfonts/cm/cmcsc
10.pfb></usr/local/texlive/2021/texmf-dist/fonts/type1/public/amsfonts/cm/cmr12
.pfb>
Output written on test.pdf (1 page, 18403 bytes).
PDF statistics:
 16 PDF objects out of 1000 (max. 8388607)
 10 compressed objects within 1 object stream
 0 named destinations out of 1000 (max. 500000)
 1 words of extra memory for PDF output out of 10000 (max. 10000000)

不确定如何进一步调试，因为没有明显的错误/警告。有人能给我指出正确的方向吗？

编辑：第一个代码片段在 Overleaf 上运行，所以它可能只是我的机器特有的东西。

答案1

事实证明问题不在于 latex，而在于我的 pdf 查看器。我latex-preview-pane在 MacOS 上使用 emacs 模式查看 pdf。然而，经过进一步调查，我发现 ghostscript 已安装但未正确链接。我使用以下命令修复了此问题：

brew install ghostscript
brew link --overwrite ghostscript

然后我重新启动了 emacs。此后，预览窗格就可以正确显示小写字母了！

感谢 David Carlisle 为我指明正确的方向。

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