当前版本的 hyperref 出现“\pdfendlink 最终与 \pdfstartlink 处于不同的嵌套级别”错误

Question 1

MWE 是一个很好的起点。从那里我可以进一步简化它。frontmatter在的可选参数中设置标题\twocolumn。这样\twocolumn[]就足够了。文本可以用垂直空格替换。类可以用标准article类替换。

梅威瑟：

\documentclass{article}

\usepackage{hyperref}

\begin{document}
\twocolumn[]   

\null\vfill\newpage
\null\kern.95\textheight

\href{http://tex.stackexchange.com}{This is a very very
  very very very very very very very very very very very very very
  very very very very very very very very long link.}
\end{document}

如果\twocolumn使用可选参数调用，则\@topnewpage调用宏，将可选参数的内容放入页面顶部的双列浮点对象中。因此，以下操作也会触发问题，而不是\twocolumn[]：

\twocolumn
\begin{figure*}\end{figure*}

在输出例程的稍后时间，宏\@combinedblfloats将顶部双浮点对象与正常页面内容结合起来：

\setbox\@outputbox \vbox to\textheight{%
  \unvbox\@tempboxa
  \vskip-\dblfloatsep
  \ifnum \@dbltopnum>\m@ne
    \dblfigrule
  \fi
  \vskip \dbltextfloatsep
  \box\@outputbox
}%

可以看出，\@outputbox又被一个附加的框住了\vbox。因此，与没有双浮点对象的第二页相比，链接第一部分的框层高了一个。

下列解决方法增加除第一页之外的装箱等级：

\documentclass{article}

\usepackage{hyperref}

\AtBeginShipout{%
  \ifnum\value{page}>1 %
    \typeout{* Additional boxing of page `\thepage'}%
    \setbox\AtBeginShipoutBox=\hbox{\copy\AtBeginShipoutBox}%
  \fi
}

\begin{document}
\twocolumn[]

\null\vfill\newpage
\null\kern.95\textheight

\href{http://tex.stackexchange.com}{This is a very very
  very very very very very very very very very very very very very
  very very very very very very very very long link.}
\end{document}

该解决方法也适用于问题的原始 MWE。在实际文档中，要知道哪些页面需要多少个额外的框级别并不是一件容易的事。

一种手动方式是使用下面的代码片段，前两行相当早，甚至在之前\documentclass，其余部分应该稍后执行，这里通过\AtBeginDocument。

\RequirePackage{atbegshi}
\AtBeginShipoutInit

\AtBeginDocument{%
  \AtBeginShipout{%
    \begingroup
      \showboxdepth=\maxdimen
      \showboxbreadth=\maxdimen
      \tracingonline=1 %
      \edef\restoreinteractionmode{\interactionmode=\the\interactionmode}%
      \nonstopmode
      \showbox\AtBeginShipoutBox
      \restoreinteractionmode
    \endgroup
  }%
}

然后可以分析输出页面的框列表，以识别链接的开始部分和下一页的结束部分。然后需要比较行开头的点数。

下一个示例尝试一种更自动化的解决方案：

\documentclass[5p]{elsarticle}

\usepackage{kantlipsum}
\usepackage{hyperref}  

\usepackage{etoolbox}
\makeatletter
\newcount\c@additionalboxlevel
\setcounter{additionalboxlevel}{0}
\newcount\c@maxboxlevel
\setcounter{maxboxlevel}{1}
\patchcmd\@combinedblfloats{\box\@outputbox}{%
  \stepcounter{additionalboxlevel}%
  \box\@outputbox
}{}{\errmessage{\noexpand\@combinedblfloats could not be patched}}

\AtBeginShipout{%
  \ifnum\value{additionalboxlevel}>\value{maxboxlevel}%
    \typeout{Warning: maxboxlevel might be too small, increase to %
      \the\value{additionalboxlevel}%
    }%
  \fi 
  \@whilenum\value{additionalboxlevel}<\value{maxboxlevel}\do{%
    \typeout{* Additional boxing of page `\thepage'}%
    \setbox\AtBeginShipoutBox=\hbox{\copy\AtBeginShipoutBox}%
    \stepcounter{additionalboxlevel}%
  }%
  \setcounter{additionalboxlevel}{0}%
}
\makeatother

\begin{document}

\begin{frontmatter}
\end{frontmatter}  

\kant*[1-4]
\kant[5]   
\href{http://tex.stackexchange.com}{This is a very very
  very very very very very very very very very very very very very
  very very very very very very very very long link.}
\end{document}

\box\@outputbox也许这个问题也可以通过\unvbox\@outputbox在宏中替换来解决\@combinedblfloats（也许垂直粘合分配可能会改变）：

\usepackage{etoolbox}
\makeatletter
\patchcmd\@combinedblfloats{\box\@outputbox}{\unvbox\@outputbox}{}{%
  \errmessage{\noexpand\@combinedblfloats could not be patched}%
}%
\makeatother

Answer