[AUCTeX] no preview of stretched vertical space \vspace*{\fill}

[Mirko Musto]

Hello,

I'm trying to get the preview of a stretched vertical space \vspace*{\fill} inside emacs with no luck.

\vspace*{\fill} is simply ignored, instead a fixed dimension like \vspace*{3in} works.

Adding the string xetec to the variable preview-required-option-list produces a full size preview of the page, but the stretched space is still ignored:

     \documentclass[]{article}
     \usepackage[paperwidth=5.2in, paperheight=7.5in]{geometry}
     \begin{document}
     \begin{quote}
     This line is at the top.
     \null\vspace*{\fill}\\
     This line is at the bottom.
     \end{quote}
     \end{document}

The following is a fragment of auctex log:
Running `Preview-LaTeX' on `sample' with ``latex  "\nonstopmode\nofiles\PassOptionsToPackage{active,tightpage,auctex,xetex}{preview}\AtBeginDocument{\ifx\ifPreview\undefined\RequirePackage[displaymath,floats,graphics,textmath,sections,footnotes]{preview}[2004/11/05]\PreviewEnvironment{abstract}\PreviewEnvironment{center}\PreviewEnvironment{enumerate}\PreviewEnvironment{quote}\fi}" "\input" sample.tex

If I compile the document without the preview package (outside emacs) the stretched space is not ignored:
latex  "\nonstopmode\nofiles\PassOptionsToPackage{active,tightpage,auctex,xetex}\AtBeginDocument{\ifx\ifPreview\undefined\RequirePackage[displaymath,floats,graphics,textmath,sections,footnotes][2004/11/05]\PreviewEnvironment{abstract}\PreviewEnvironment{center}\PreviewEnvironment{enumerate}\PreviewEnvironment{quote}\fi}\input{sample.tex}"

Any advice, please?