mdframed : Bug with page break? [closed]

Question

I'm trying to use the package mdframed to handle framed boxes, that allow page breaking when the content of the box is too large. Nevertheless, i encounter the following difficulty :

\documentclass{article}
    \usepackage[utf8]{inputenc}
    \usepackage{blindtext}
    \usepackage{mdframed}
    
    \begin{document}
    \blindtext\blindtext\blindtext\vspace{5cm}
    \begin{mdframed}[userdefinedwidth=\textwidth]
    \begin{tabular}{rl}
        coucou &coucou \\
        coucou &coucou \\
        coucou &coucou \\
    \end{tabular}
    
    TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 
\end{mdframed}

\end{document}

With this choice of \vspace{5cm} before the mdframed environment, the tabular appears on the top of one page, and the rest on the next page, which is is this case absurd.

Is it a bug ? how can i bypass it ?

I guess the problem comes somehow from the fact, that the tabular is not splittable.

---

EDIT: PeterGrill

As Marco requested, here is a MWE without \vspace that reproduces the problem:

\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{blindtext}
\usepackage{mdframed}

\begin{document}
\blindtext\blindtext\blindtext\blindtext%\vspace{5cm}
TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT22 
\begin{mdframed}[userdefinedwidth=\textwidth]
    \begin{tabular}{rl}
        coucou &coucou \\
        coucou &coucou \\
        coucou &coucou \\
    \end{tabular}
    
    TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 TEXT2 
\end{mdframed}
\end{document}

---

EDIT: NicolasRoy

I attached two screenshots.

Output with mdframed v1.0b:

Output with mdframed v1.3a:

---

EDIT: NicolasRoy

I put Marco's proposed code for \def\mdf@put@frame@i in the preamble of my MWE, and get the following output :

Answer 1

I know it's a comment but too long ;-)

Thanks @PeterGrill for the nice example. The problem is based on the internal algorithm. To explain this behaviour I describe the algorithm.

1. If the content of the environment has enough space for the current page mdframed prints the material.

2. If the content is to big for one page but the available vertical space is more than 2\baselineskip mdframed tries to split the contents.

And here is the problem. The environment tabular can't be split. mdframed tests only whether the space of the split box is less than the available vertical space. If this test fails, mdframed repeats the splitting with a lower dimension (90% of the available space) and print the first part.

And here is my mistake. I didn't notice your approach. ;-). The environment tabular can't be split and the reduction of the splitting dimension fails. So I have to implement an additional test.

I uploaded version 1.4a to github. With the example of @PeterGrill you get the following output:

PS: I am happy about every proof reader ;-)