我的文档毫无预警地就编译通过了，我为此感到很自豪。今天早上我更新了 texlive，突然我的文档出现了警告 :(
LaTeX Warning: Command \showhyphens has changed.
Check if current package is valid.
如何禁用它？我没有更新 microtype，为什么它会产生警告？
\documentclass{article}
\usepackage{microtype}
\begin{document}
test
\end{document}
。日志：
This is pdfTeX, Version 3.14159265-2.6-1.40.20 (TeX Live 2019) (preloaded format=pdflatex 2019.10.7) 10 OCT 2019 14:29
entering extended mode
restricted \write18 enabled.
%&-line parsing enabled.
**document.tex
(./document.tex
LaTeX2e <2019-10-01>
(/usr/local/texlive/2019/texmf-dist/tex/latex/base/article.cls
Document Class: article 2019/08/27 v1.4j Standard LaTeX document class
(/usr/local/texlive/2019/texmf-dist/tex/latex/base/size10.clo
File: size10.clo 2019/08/27 v1.4j Standard LaTeX file (size option)
)
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)
(/usr/local/texlive/2019/texmf-dist/tex/latex/microtype/microtype.sty
Package: microtype 2019/02/28 v2.7b Micro-typographical refinements (RS)
(/usr/local/texlive/2019/texmf-dist/tex/latex/graphics/keyval.sty
Package: keyval 2014/10/28 v1.15 key=value parser (DPC)
\KV@toks@=\toks14
)
\MT@toks=\toks15
\MT@count=\count88
LaTeX Info: Redefining \textls on input line 790.
\MT@outer@kern=\dimen103
LaTeX Info: Redefining \textmicrotypecontext on input line 1336.
\MT@listname@count=\count89
(/usr/local/texlive/2019/texmf-dist/tex/latex/microtype/microtype-pdftex.def
File: microtype-pdftex.def 2019/02/28 v2.7b Definitions specific to pdftex (RS)
LaTeX Info: Redefining \lsstyle on input line 914.
LaTeX Info: Redefining \lslig on input line 914.
\MT@outer@space=\skip43
)
Package microtype Info: Loading configuration file microtype.cfg.
(/usr/local/texlive/2019/texmf-dist/tex/latex/microtype/microtype.cfg
File: microtype.cfg 2019/02/28 v2.7b microtype main configuration file (RS)
))
(/usr/local/texlive/2019/texmf-dist/tex/latex/lipsum/lipsum.sty
(/usr/local/texlive/2019/texmf-dist/tex/latex/l3kernel/expl3.sty
Package: expl3 2019-10-02 L3 programming layer (loader)
(/usr/local/texlive/2019/texmf-dist/tex/latex/l3kernel/expl3-code.tex
Package: expl3 2019-10-02 L3 programming layer (code)
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(/usr/local/texlive/2019/texmf-dist/tex/latex/l3kernel/l3deprecation.def
File: l3deprecation.def 2019-04-06 v L3 Deprecated functions
))
(/usr/local/texlive/2019/texmf-dist/tex/latex/l3backend/l3backend-pdfmode.def
File: l3backend-pdfmode.def 2019-04-06 v L3 backend support: PDF mode
\l__kernel_color_stack_int=\count177
\l__pdf_internal_box=\box45
)) (/usr/local/texlive/2019/texmf-dist/tex/latex/l3packages/xparse/xparse.sty
Package: xparse 2019-05-28 L3 Experimental document command parser
\l__xparse_current_arg_int=\count178
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)
Package: lipsum 2019/01/02 v2.2 150 paragraphs of Lorem Ipsum dummy text
(/usr/local/texlive/2019/texmf-dist/tex/latex/lipsum/lipsum.ltd.tex
File: lipsum.ltd.tex 2019/01/02 v2.2 The Lorem ipsum dummy text
))
(./document.aux)
\openout1 = `document.aux'.
LaTeX Font Info: Checking defaults for OML/cmm/m/it on input line 6.
LaTeX Font Info: ... okay on input line 6.
LaTeX Font Info: Checking defaults for T1/cmr/m/n on input line 6.
LaTeX Font Info: ... okay on input line 6.
LaTeX Font Info: Checking defaults for OT1/cmr/m/n on input line 6.
LaTeX Font Info: ... okay on input line 6.
LaTeX Font Info: Checking defaults for OMS/cmsy/m/n on input line 6.
LaTeX Font Info: ... okay on input line 6.
LaTeX Font Info: Checking defaults for OMX/cmex/m/n on input line 6.
LaTeX Font Info: ... okay on input line 6.
LaTeX Font Info: Checking defaults for U/cmr/m/n on input line 6.
LaTeX Font Info: ... okay on input line 6.
LaTeX Info: Redefining \microtypecontext on input line 6.
Package microtype Info: Generating PDF output.
Package microtype Info: Character protrusion enabled (level 2).
Package microtype Info: Using default protrusion set `alltext'.
Package microtype Info: Automatic font expansion enabled (level 2),
(microtype) stretch: 20, shrink: 20, step: 1, non-selected.
Package microtype Info: Using default expansion set `basictext'.
LaTeX Warning: Command \showhyphens has changed.
Check if current package is valid.
Package microtype Info: No adjustment of tracking.
Package microtype Info: No adjustment of interword spacing.
Package microtype Info: No adjustment of character kerning.
(/usr/local/texlive/2019/texmf-dist/tex/latex/microtype/mt-cmr.cfg
File: mt-cmr.cfg 2013/05/19 v2.2 microtype config. file: Computer Modern Roman
(RS)
) [1
{/usr/local/texlive/2019/texmf-var/fonts/map/pdftex/updmap/pdftex.map}] [2]
(./document.aux) )
Here is how much of TeX's memory you used:
12021 strings out of 492166
234254 string characters out of 6125362
565125 words of memory out of 5000000
16385 multiletter control sequences out of 15000+600000
533409 words of font info for 45 fonts, out of 8000000 for 9000
1141 hyphenation exceptions out of 8191
44i,4n,67p,208b,317s stack positions out of 5000i,500n,10000p,200000b,80000s
</usr/local/texlive/2019/texmf-dist/fonts/type1/public/amsfon
ts/cm/cmr10.pfb>
Output written on document.pdf (2 pages, 22541 bytes).
PDF statistics:
15 PDF objects out of 1000 (max. 8388607)
9 compressed objects within 1 object stream
0 named destinations out of 1000 (max. 500000)
2049 words of extra memory for PDF output out of 10000 (max. 10000000)
答案1
如果你想在软件包更新之前消除警告，你可以这样做
\documentclass{article}
%
\let\CheckCommand\providecommand
\usepackage{microtype}
\begin{document}
test
\end{document}
\providecommand具有与因此相同的语法\CheckCommand，将会吞噬参数，但始终对正在检查的现有命令不执行任何操作。