我最近不得不重新格式化安装了 MiKTeX 的 D: 盘。我重新安装了 MiKTeX，但现在我正在处理的项目无法编译。我尝试修复、卸载并重新安装 MiKTeX，但都不起作用。最后，我卸载了 MiKTeX 并安装了 TeXLive，但问题仍然存在。
当我尝试运行 pdflatex 时，出现错误：
...
(d:/Program Files/texlive/2020/texmf-dist/tex/latex/biblatex/biblatex.sty
(d:/Program Files/texlive/2020/texmf-dist/tex/latex/logreq/logreq.sty
(d:/Program Files/texlive/2020/texmf-dist/tex/latex/logreq/logreq.def))
! Text line contains an invalid character.
l.2175 \bgroup\nohyphenation#1\egroup^^^
^200b}}
Texmaker 显示问题出在 biblatex.sty 文件中。该文件中的第 2171-2175 行：
\ifundef\XeTeXrevision
{\providerobustcmd*{\textnohyphenation}[1]{%
\bgroup\nohyphenation#1\egroup}}
{\providerobustcmd*{\textnohyphenation}[1]{%
\bgroup\nohyphenation#1\egroup^^^^200b}}
我没有编辑过这个文件。
如果我在 pdflatex 暂停时输入 R，编译将继续，并且据我所知，pdf 会毫无错误地创建，所以这实际上只是一个便利问题。例如，我无法在 Texmaker 中编译项目。
主日志：
This is pdfTeX, Version 3.14159265-2.6-1.40.21 (TeX Live 2020/W32TeX) (preloaded format=pdflatex 2020.10.1) 1 OCT 2020 21:59
entering extended mode
restricted \write18 enabled.
%&-line parsing enabled.
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(./main.tex
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Document Class: tauthesis 2020/05/18 v1.6 Thesis styles used in Tampere Univers
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File: size12.clo 2019/12/20 v1.4l Standard LaTeX file (size option)
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\c@part=\count168
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Package: ifpdf 2019/10/25 v3.4 ifpdf legacy package. Use iftex instead.
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Package: ifxetex 2019/10/25 v0.7 ifxetex legacy package. Use iftex instead.
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LaTeX Info: Composite with undeclared \b in encoding L8U on input line 278.
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Package xcolor Info: Driver file: pdftex.def on input line 225.
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Package xcolor Info: Model `cmy' substituted by `cmy0' on input line 1348.
Package xcolor Info: Model `hsb' substituted by `rgb' on input line 1352.
Package xcolor Info: Model `RGB' extended on input line 1364.
Package xcolor Info: Model `HTML' substituted by `rgb' on input line 1366.
Package xcolor Info: Model `Hsb' substituted by `hsb' on input line 1367.
Package xcolor Info: Model `tHsb' substituted by `hsb' on input line 1368.
Package xcolor Info: Model `HSB' substituted by `hsb' on input line 1369.
Package xcolor Info: Model `Gray' substituted by `gray' on input line 1370.
Package xcolor Info: Model `wave' substituted by `hsb' on input line 1371.
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Package pdftexcmds Info: \pdfdraftmode found.
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Package hyperref Info: Option `pdfa' set `true' on input line 4338.
Package hyperref Info: Hyper figures OFF on input line 4464.
Package hyperref Info: Link nesting OFF on input line 4469.
Package hyperref Info: Hyper index ON on input line 4472.
Package hyperref Info: Plain pages OFF on input line 4479.
Package hyperref Info: Backreferencing OFF on input line 4484.
Package hyperref Info: Implicit mode ON; LaTeX internals redefined.
Package hyperref Info: Bookmarks ON on input line 4717.
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(d:/Program Files/texlive/2020/texmf-dist/tex/latex/url/url.sty
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LaTeX Info: Redefining \url on input line 5076.
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Package hyperref Info: Link coloring OFF on input line 6367.
Package hyperref Info: Link coloring with OCG OFF on input line 6372.
Package hyperref Info: PDF/A mode ON on input line 6375.
LaTeX Info: Redefining \ref on input line 6417.
LaTeX Info: Redefining \pageref on input line 6421.
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Package uniquecounter Info: New unique counter `rerunfilecheck' on input line 2
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Package hyperref Info: Option `unicode' set `true' on input line 1463.
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Package hyperref Info: Option `psdextra' set `true' on input line 1465.
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** pdfx: No file main.xmpdata . Metadata will be incomplete!
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! Text line contains an invalid character.
l.2175 \bgroup\nohyphenation#1\egroup^^^
^200b}}
? X
Here is how much of TeX's memory you used:
19886 strings out of 480875
320003 string characters out of 5904580
566727 words of memory out of 5000000
35302 multiletter control sequences out of 15000+600000
536150 words of font info for 31 fonts, out of 8000000 for 9000
1141 hyphenation exceptions out of 8191
61i,0n,52p,908b,4779s stack positions out of 5000i,500n,10000p,200000b,80000s
No pages of output.
pdfTeX warning: pdflatex.exe: dangling objects discarded, no output file produc
ed.
PDF statistics:
3 PDF objects out of 1000 (max. 8388607)
0 named destinations out of 1000 (max. 500000)
13 words of extra memory for PDF output out of 10000 (max. 10000000)
答案1
这是使用该包的一个不幸的副作用pdfx。
一个更简单的例子是
\documentclass{article}
\usepackage{pdfx}
\begin{document}
\iffalse
^^^^200b
\fi
\end{document}
你可以将字符 30 的 catcode 设为正常 (12)，而不是无效 (15)
\documentclass{article}
\usepackage{pdfx}
\catcode30=12
\begin{document}
\iffalse
^^^^200b
\fi
\end{document}
答案2
此问题也已在biblatexbugtracker 中报告（https://github.com/plk/biblatex/issues/1044biblatex) 并将在即将发布的版本中得到解决biblatex。
现在用来避免该问题的解决方法biblatex是将问题隔离^^^^200b到仅由 Unicode 引擎读取的文件中，而该文件显然不被pdfx/禁止\UseRawInputEncoding。