endless loop with mdframed

Question

The following code leads to an endless loop. pdflatex is at 100% CPU and the log is constantly increasing with number counted upwards.

\documentclass{article}
\usepackage{mdframed}
\begin{document}
\mdframed
\vrule height 210mm
\endmdframed
\end{document}

Answer 1

Based on the example of Patrick, I can provide an answer.

The material of the environment mdframed is saved in a simple \vbox. Based on computed lengths related to the text height, the box will be split by \vsplit. Your material can't be split, so you run into an endless loop because mdframed repeats the splitting algorithm. Up to now there is no check for such situations.

In order to avoid the endless loop you can use the option nobreak. However the result is a blank page and the output itself.

\documentclass{scrartcl}
\usepackage{mdframed}
\usepackage{lipsum}
\begin{document}
\begin{mdframed}[nobreak=true]
 \vrule height 250mm
\end{mdframed}
\end{document}