tcolorbox vs. geometry vs. hyperref bug

[Ulrike Fischer]

Am Mon, 3 May 2021 14:23:35 -0600 (MDT) schrieb Doug McKenna:

> Any help or workaround that makes this work as expected would be
> appreciated.  The one caveat is that I'm using TeXLive 2019, so
> perhaps there's been a bug fix since then.

looks ok on texlive 2021.

Try this after loading  hyperref

\makeatletter
\def\Hy at SaveLastskip{%
  \let\Hy at RestoreLastskip\relax
  \ifvmode
    \ifdim\lastskip=\z@
      \ifnum\lastnodetype=1 %
        \let\Hy at RestoreLastskip\relax 
      \else    
        \let\Hy at RestoreLastskip\nobreak                                       
      \fi                                                 
    \else
      \begingroup
        \skip@=-\lastskip
        \edef\x{%
          \endgroup
          \def\noexpand\Hy at RestoreLastskip{%
            \noexpand\ifvmode
              \noexpand\nobreak
              \vskip\the\skip@
              \vskip\the\lastskip\relax
            \noexpand\fi
          }%
        }%
      \x
    \fi
  \else
    \ifhmode
      \ifdim\lastskip=\z@
        \let\Hy at RestoreLastskip\nobreak
      \else
        \begingroup
          \skip@=-\lastskip
          \edef\x{%
            \endgroup
            \def\noexpand\Hy at RestoreLastskip{%
              \noexpand\ifhmode
                \noexpand\nobreak
                \hskip\the\skip@
                \hskip\the\lastskip\relax
              \noexpand\fi
            }%
          }%
        \x
      \fi
    \fi
  \fi
}%
\makeatother



-- 
Ulrike Fischer 
https://www.troubleshooting-tex.de/