昨天升级了我于 2019 年 10 月 5 日安装的 MiKTeX 后nicematrix，一些旧代码不再按预期工作。例如（不是真正的 MWE）：
\documentclass[margin=3mm, varwidth]{standalone}
\usepackage{nicematrix}
\usetikzlibrary{decorations.pathreplacing,
calligraphy}
\tikzset{
B/.style = {decorate,
decoration={calligraphic brace, amplitude=4pt,
raise=1pt, mirror},% for mirroring of brace
thick,
pen colour=black}
}
\begin{document}
\[\setlength\arraycolsep{1pt}
\begin{NiceArray}{RCL}%
[code-after={\tikz\draw[B] (1-1.north west) -- (2-1.south west);
\tikz\draw[B] (3-1.north west) -- (4-1.south west);
\tikz\draw[B] (5-1.north -| 6-1.west) -- (6-1.south west);
\tikz\draw[B] (7-1.north west) -- (7-1.west |- 10-1.south);
}
]
x_0 & = & 3 \\
x_1 & = & 1 \\[\jot]
%
c_12^0+c_2\cdot0\cdot2^0 & = & 3 \\
c_12^1+c_2\cdot1\cdot2^1 & = & 1 \\[\jot]
%
c_1 & = & 3 \\
2c_1+2c_2 & = & 1 \\[\jot]
%
c_1 & = & 3\\
c_2 & = & (1-2\cdot 3)/2\\
& = & (-5)/2\\
& = & -\frac{5}{2}
\end{NiceArray}
\]
\end{document}
不再产生在中定义的括号code-after={...}。它们应该出现在等式的左侧。还有其他人遇到过类似的问题吗？或者知道一些解决方法来返回上述 MWE 中缺失的括号。
编辑： 上述 MWE 中使用的文件列表为：
*File List*
standalone.cls 2018/03/26 v1.3a Class to compile TeX sub-files standalone
shellesc.sty 2016/06/07 v0.02b unified shell escape interface for LaTeX
ifluatex.sty 2016/05/16 v1.4 Provides the ifluatex switch (HO)
ifpdf.sty 2018/09/07 v3.3 Provides the ifpdf switch
ifxetex.sty 2010/09/12 v0.6 Provides ifxetex conditional
xkeyval.sty 2014/12/03 v2.7a package option processing (HA)
xkeyval.tex 2014/12/03 v2.7a key=value parser (HA)
standalone.cfg 2018/03/26 v1.3a Default configuration file for 'standalone'
class
article.cls 2019/08/27 v1.4j Standard LaTeX document class
size10.clo 2019/08/27 v1.4j Standard LaTeX file (size option)
varwidth.sty 2009/03/30 ver 0.92; Variable-width minipages
nicematrix.sty 2019/10/05 v3.4 Several features to improve the typesetting o
f mathematical matrices with TikZ
tikz.sty 2019/08/03 v3.1.4b (3.1.4b)
pgf.sty 2019/08/03 v3.1.4b (3.1.4b)
pgfrcs.sty 2019/08/03 v3.1.4b (3.1.4b)
everyshi.sty 2001/05/15 v3.00 EveryShipout Package (MS)
pgfrcs.code.tex
pgfcore.sty 2019/08/03 v3.1.4b (3.1.4b)
graphicx.sty 2017/06/01 v1.1a Enhanced LaTeX Graphics (DPC,SPQR)
graphics.sty 2019/07/20 v1.3b Standard LaTeX Graphics (DPC,SPQR)
trig.sty 2016/01/03 v1.10 sin cos tan (DPC)
graphics.cfg 2016/06/04 v1.11 sample graphics configuration
pdftex.def 2018/01/08 v1.0l Graphics/color driver for pdftex
pgfsys.sty 2019/08/03 v3.1.4b (3.1.4b)
pgfsys.code.tex
pgfsyssoftpath.code.tex 2019/08/03 v3.1.4b (3.1.4b)
pgfsysprotocol.code.tex 2019/08/03 v3.1.4b (3.1.4b)
xcolor.sty 2016/05/11 v2.12 LaTeX color extensions (UK)
color.cfg 2016/01/02 v1.6 sample color configuration
pgfcore.code.tex
pgfcomp-version-0-65.sty 2019/08/03 v3.1.4b (3.1.4b)
pgfcomp-version-1-18.sty 2019/08/03 v3.1.4b (3.1.4b)
pgffor.sty 2019/08/03 v3.1.4b (3.1.4b)
pgfkeys.sty
pgfkeys.code.tex
pgfmath.sty
pgfmath.code.tex
pgffor.code.tex
tikz.code.tex
expl3.sty 2019-10-02 L3 programming layer (loader)
expl3-code.tex 2019-10-02 L3 programming layer
l3deprecation.def 2019-04-06 v L3 Deprecated functions
l3backend-pdfmode.def 2019-04-06 v L3 backend support: PDF mode
l3keys2e.sty 2019-05-28 LaTeX2e option processing using LaTeX3 keys
array.sty 2019/08/31 v2.4l Tabular extension package (FMi)
amsmath.sty 2019/04/01 v2.17c AMS math features
amstext.sty 2000/06/29 v2.01 AMS text
amsgen.sty 1999/11/30 v2.0 generic functions
amsbsy.sty 1999/11/29 v1.2d Bold Symbols
amsopn.sty 2016/03/08 v2.02 operator names
xparse.sty 2019-05-28 L3 Experimental document command parser
spath3.sty 2019/02/12 v1.2 Functions for manipulating PGF soft paths
supp-pdf.mkii
epstopdf-base.sty 2016/05/15 v2.6 Base part for package epstopdf
infwarerr.sty 2016/05/16 v1.4 Providing info/warning/error messages (HO)
grfext.sty 2016/05/16 v1.2 Manage graphics extensions (HO)
kvdefinekeys.sty 2016/05/16 v1.4 Define keys (HO)
ltxcmds.sty 2016/05/16 v1.23 LaTeX kernel commands for general use (HO)
kvoptions.sty 2016/05/16 v3.12 Key value format for package options (HO)
kvsetkeys.sty 2016/05/16 v1.17 Key value parser (HO)
etexcmds.sty 2016/05/16 v1.6 Avoid name clashes with e-TeX commands (HO)
pdftexcmds.sty 2019/07/25 v0.30 Utility functions of pdfTeX for LuaTeX (HO)
***********
今天（2015/10/15）升级的情况没有变化。
问题已解决自 2019/10/13 起版本 3.5 开始nicematrix。