由于某种原因，包含 fontspec 包导致 XeLaTeX 无法正确编译。
以下是 MWE（受 Rob Hyndman 启发）：
\documentclass{article}
\usepackage{lipsum,fontspec}
\begin{document}
\section{Introduction}
\lipsum[1]
\section{Main}
\lipsum[1]
\end{document}
如果我删除 fontspec 包，一切都会正常工作。使用它，我会收到很多错误，并且生成的 PDF 顶部有以下文本：
require(’luaotfload-main’) local v oid = luaotfload.main()
require(”fontspec”)
EU2
FileList文件中的内容.log为：
article.cls 2014/09/29 v1.4h Standard LaTeX document class
size10.clo 2014/09/29 v1.4h Standard LaTeX file (size option)
lipsum.sty 2014/07/27 v1.3 150 paragraphs of Lorem Ipsum dummy text
fontspec.sty 2016/02/01 v2.5a Font selection for XeLaTeX and LuaLaTeX
expl3.sty 2012/04/23 v3570 L3 Experimental code bundle wrapper
l3names.sty 2012/03/04 v3494 L3 Experimental namespace for primitives
l3bootstrap.sty 2011/12/29 v3110 L3 Experimental bootstrap code
etex.sty 2016/01/11 v2.6 eTeX basic definition package (PEB,DPC)
color.sty 2016/01/03 v1.1b Standard LaTeX Color (DPC)
color.cfg 2007/01/18 v1.5 color configuration of teTeX/TeXLive
xetex.def 2015/09/11 v4.06 LaTeX color/graphics driver for XeTeX (TeX Live/RRM/JK)
infwarerr.sty 2010/04/08 v1.3 Providing info/warning/error messages (HO)
ltxcmds.sty 2011/11/09 v1.22 LaTeX kernel commands for general use (HO)
graphics.sty 2016/01/03 v1.0q Standard LaTeX Graphics (DPC,SPQR)
trig.sty 2016/01/03 v1.10 sin cos tan (DPC)
graphics.cfg 2010/04/23 v1.9 graphics configuration of TeX Live
l3basics.sty 2012/03/04 v3491 L3 Experimental basic definitions
l3expan.sty 2012/02/26 v3460 L3 Experimental argument expansion
l3tl.sty 2012/03/04 v3490 L3 Experimental token lists
l3seq.sty 2012/03/04 v3490 L3 Experimental sequences and stacks
l3int.sty 2012/03/04 v3490 L3 Experimental integers
l3quark.sty 2012/02/12 v3384 L3 Experimental quarks
l3prg.sty 2012/03/04 v3490 L3 Experimental control structures
l3clist.sty 2012/03/04 v3490 L3 Experimental comma separated lists
l3token.sty 2012/03/04 v3491 L3 Experimental token manipulation
l3prop.sty 2012/03/04 v3490 L3 Experimental property lists
l3msg.sty 2012/04/23 v3568 L3 Experimental messages
l3file.sty 2012/03/09 v3520 L3 Experimental file and I/O operations
l3skip.sty 2012/03/05 v3499 L3 Experimental dimensions and skips
l3keys.sty 2012/03/03 v3487 L3 Experimental key-value interfaces
l3fp.sty 2012/03/04 v3490 L3 Experimental floating-point operations
l3box.sty 2012/03/04 v3490 L3 Experimental boxes
l3coffins.sty 2012/03/03 v3482 L3 Experimental coffin code layer
l3color.sty 2011/09/07 v2776 L3 Experimental colour support
l3luatex.sty 2012/02/09 v3355 L3 Experimental LuaTeX-specific functions
xparse.sty 2012/04/23 v3570 L3 Experimental document command parser
luaotfload.sty 2015/12/09 v2.6 OpenType layout system
fontspec-luatex.sty 2016/02/01 v2.5a Font selection for XeLaTeX and LuaLaTeX
fontenc.sty
eu2enc.def 2010/05/27 v0.1h Experimental Unicode font encodings
eu2lmr.fd 2009/10/30 v1.6 Font defs for Latin Modern
xunicode.sty 2011/09/09 v0.981 provides access to latin accents and many other characters in Unicode lower plane
eu2lmss.fd 2009/10/30 v1.6 Font defs for Latin Modern
graphicx.sty 2014/10/28 v1.0g Enhanced LaTeX Graphics (DPC,SPQR)
keyval.sty 2014/10/28 v1.15 key=value parser (DPC)
fontspec.cfg
t3cmr.fd 2001/12/31 TIPA font definitions
答案1
已解决：根据 egreg 对涉及l3packages和其他人的过时软件包的评论，我在软件包管理器中卸载了这些软件包，然后从 MikTeX 文件夹中删除了这些软件包的子文件夹。重新编译现在可以生成完美的 PDF（即使使用\setmainfont{Georgia}）。
谢谢大家！