我是 MikTeX 的长期用户，非常满意。但今天不行。MikTeX 22.3 似乎出了点问题。我尝试过更新、降级、重新安装，但都不起作用。我尝试编译这个 MWE：
\documentclass{article}
\begin{document}
Hi
\end{document}
和
xelatex.exe -interaction=nonstopmode paper.tex
我在尝试过的两台机器上都出现了这样的错误：
! Paragraph ended before \__sys_tmp:w was complete.
<to be read again>
\par
l.80 ...c__kernel_sys_dvipdfmx_version_int { 0 } }
完整日志如下：
This is XeTeX, Version 3.141592653-2.6-0.999994 (MiKTeX 22.3) (preloaded format=xelatex 2022.4.5) 5 APR 2022 11:48
entering extended mode
restricted \write18 enabled.
%&-line parsing enabled.
**./paper.tex
(paper.tex
LaTeX2e <2021-11-15> patch level 1
L3 programming layer <2022-02-24>
(C:\Users\ihb\AppData\Local\Programs\MiKTeX\tex/latex/base\article.cls
Document Class: article 2021/10/04 v1.4n Standard LaTeX document class
(C:\Users\ihb\AppData\Local\Programs\MiKTeX\tex/latex/base\size10.clo
File: size10.clo 2021/10/04 v1.4n Standard LaTeX file (size option)
)
\c@part=\count181
\c@section=\count182
\c@subsection=\count183
\c@subsubsection=\count184
\c@paragraph=\count185
\c@subparagraph=\count186
\c@figure=\count187
\c@table=\count188
\abovecaptionskip=\skip47
\belowcaptionskip=\skip48
\bibindent=\dimen138
)
(C:\Users\ihb\AppData\Local\Programs\MiKTeX\tex/latex/l3backend\l3backend-xetex
.def
File: l3backend-xetex.def 2022-02-07 L3 backend support: XeTeX
()
! Argument of \__sys_tmp:w has an extra }.
<inserted text>
\par
l.80 ...c__kernel_sys_dvipdfmx_version_int { 0 } }
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?
\q_stop \__int_eval_end:
! Paragraph ended before \__sys_tmp:w was complete.
<to be read again>
\par
l.80 ...c__kernel_sys_dvipdfmx_version_int { 0 } }
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.
! Missing number, treated as zero.
<to be read again>
\scan_stop:
l.80 ...c__kernel_sys_dvipdfmx_version_int { 0 } }
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)
! Missing = inserted for \ifnum.
<to be read again>
\tex_par:D
l.80 ...c__kernel_sys_dvipdfmx_version_int { 0 } }
I was expecting to see `<', `=', or `>'. Didn't.
! Missing number, treated as zero.
<to be read again>
\tex_par:D
l.80 ...c__kernel_sys_dvipdfmx_version_int { 0 } }
A number should have been here; I inserted `0'.
(If you can't figure out why I needed to see a number,
look up `weird error' in the index to The TeXbook.)
! LaTeX Error: Missing \begin{document}.
See the LaTeX manual or LaTeX Companion for explanation.
Type H <return> for immediate help.
...
l.80 ...c__kernel_sys_dvipdfmx_version_int { 0 } }
You're in trouble here. Try typing <return> to proceed.
If that doesn't work, type X <return> to quit.
! You can't use `\numexpr' in horizontal mode.
\int_compare:nNnTF ...nt_eval:w #1#2\__int_eval:w
#3\__int_eval_end: \__prg_...
l.80 ...c__kernel_sys_dvipdfmx_version_int { 0 } }
Sorry, but I'm not programmed to handle this case;
I'll just pretend that you didn't ask for it.
If you're in the wrong mode, you might be able to
return to the right one by typing `I}' or `I$' or `I\par'.
Missing character: There is no ^^@ in font [lmroman10-regular]:mapping=tex-text
;!
\c__kernel_sys_dvipdfmx_version_int=\count189
\l__color_backend_stack_int=\count190
\g__graphics_track_int=\count191
\l__pdf_internal_box=\box50
\g__pdf_backend_object_int=\count192
\g__pdf_backend_annotation_int=\count193
\g__pdf_backend_link_int=\count194
) (paper.aux)
\openout1 = `paper.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: Trying to load font information for TS1+cmr on input line 2
.
(C:\Users\ihb\AppData\Local\Programs\MiKTeX\tex/latex/base\ts1cmr.fd
File: ts1cmr.fd 2019/12/16 v2.5j Standard LaTeX font definitions
)
LaTeX Font Info: ... okay on input line 2.
LaTeX Font Info: Checking defaults for TU/lmr/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
]
(paper.aux) )
Here is how much of TeX's memory you used:
449 strings out of 410967
8886 string characters out of 2824160
303500 words of memory out of 3000000
21258 multiletter control sequences out of 15000+600000
469267 words of font info for 29 fonts, out of 8000000 for 9000
1348 hyphenation exceptions out of 8191
33i,5n,38p,146b,107s stack positions out of 10000i,1000n,20000p,200000b,80000s
Output written on paper.pdf (1 page).
编辑：
以下是 Powershell 中的输出（请注意，不知何故无法找到可执行文件但又可以调用它）：
(base) PS C:\> where extractbb
(base) PS C:\> extractbb --version
This is extractbb Version 20211117
Copyright (C) 2008-2021 by Jin-Hwan Cho and Matthias Franz
编辑2：
(base) PS C:\Users\ihb\Desktop> get-command extractbb
CommandType Name Version Source
----------- ---- ------- ------
Application extractbb.exe 22.3.0.0 C:\Users\ihb\AppData\Local\Programs\MiKTeX\miktex\bin\x64\extractbb.exe
(base) PS C:\Users\ihb\Desktop> get-command xelatex
CommandType Name Version Source
----------- ---- ------- ------
Application xelatex.exe 22.3.0.0 C:\Users\ihb\AppData\Local\Programs\MiKTeX\miktex\bin\x64\xelatex.exe
(base) PS C:\Users\ihb\Desktop> xelatex.exe -interaction=nonstopmode MWE.tex
This is XeTeX, Version 3.141592653-2.6-0.999994 (MiKTeX 22.3) (preloaded format=xelatex.fmt)
restricted \write18 enabled.
entering extended mode
(MWE.tex
LaTeX2e <2021-11-15> patch level 1
L3 programming layer <2022-02-24>
(C:\Users\ihb\AppData\Local\Programs\MiKTeX\tex/latex/base\article.cls
Document Class: article 2021/10/04 v1.4n Standard LaTeX document class
(C:\Users\ihb\AppData\Local\Programs\MiKTeX\tex/latex/base\size10.clo))
(C:\Users\ihb\AppData\Local\Programs\MiKTeX\tex/latex/l3backend\l3backend-xetex
.def ()
! Argument of \__sys_tmp:w has an extra }.
<inserted text>
\par
l.80 ...c__kernel_sys_dvipdfmx_version_int { 0 } }
Runaway argument?
\q_stop \__int_eval_end:
! Paragraph ended before \__sys_tmp:w was complete.
<to be read again>
\par
l.80 ...c__kernel_sys_dvipdfmx_version_int { 0 } }
! Missing number, treated as zero.
<to be read again>
\scan_stop:
l.80 ...c__kernel_sys_dvipdfmx_version_int { 0 } }
! Missing = inserted for \ifnum.
<to be read again>
\tex_par:D
l.80 ...c__kernel_sys_dvipdfmx_version_int { 0 } }
! Missing number, treated as zero.
<to be read again>
\tex_par:D
l.80 ...c__kernel_sys_dvipdfmx_version_int { 0 } }
! LaTeX Error: Missing \begin{document}.
See the LaTeX manual or LaTeX Companion for explanation.
Type H <return> for immediate help.
...
l.80 ...c__kernel_sys_dvipdfmx_version_int { 0 } }
! You can't use `\numexpr' in horizontal mode.
\int_compare:nNnTF ...nt_eval:w #1#2\__int_eval:w
#3\__int_eval_end: \__prg_...
l.80 ...c__kernel_sys_dvipdfmx_version_int { 0 } }
Missing character: There is no ^^@ in font [lmroman10-regular]:mapping=tex-text
;!
) (MWE.aux)
(C:\Users\ihb\AppData\Local\Programs\MiKTeX\tex/latex/base\ts1cmr.fd) [1]
(MWE.aux) )
(see the transcript file for additional information)
Output written on MWE.pdf (1 page).
Transcript written on MWE.log.