[XeTeX] Bug with color \specials?

[Denis Bitouzé]

Hi,

a bug with latest xetex:

  XeTeX, Version 3.14159265-2.6-0.99991 (preloaded format=xelatex 2014.6.19)

occurs, probably related to color \specials: in the following MWE (say
`test.tex') compiled with xelatex, the text after the tcolorbox
environment on page 2 is colored in white.

--8<---------------cut here---------------start------------->8---
\documentclass{article}
\usepackage{lipsum}
\usepackage{tcolorbox}
%
\tcbuselibrary{breakable}
%
\begin{document}
%
\rule{0.4pt}{17cm}
%
\begin{tcolorbox}[breakable]
\lipsum[1]
\end{tcolorbox}
\lipsum
\end{document}
--8<---------------cut here---------------end--------------->8---

The text is colored as expected if the test.tex is compiled with:

--8<---------------cut here---------------start------------->8---
xelatex -no-pdf test
xdvipdfmx -c test.xdv
--8<---------------cut here---------------end--------------->8---

The trouble has been reported on:

  ╭────
  │ http://tex.stackexchange.com/q/186139/18401
  ╰────

Best regards.
-- 
Denis