gb4e example with two-paragraphed footnote throws error

Question

gb4e is a useful package for writing linguistics papers, as it allows one to append judgments to examples, via the optional argument of \ex{}.

As such, I would like to retain the use of this package, but I have just run into a problem. I'm not sure what is going on internally, but it seems that gb4e prevents paragraph breaks from occurring anywhere within the scope of the required argument of \ex{}.

In particular, I have a footnote attached to an example to clarify an aspect of the example. If I try to put a paragraph break inside of this footnote, using either a blank line or the TeX primitive \par, an error is thrown.

Here's an MWE:

\documentclass{article}

\usepackage{gb4e}

\begin{document}

\begin{exe}
    \ex[]{An example requiring a footnote\footnote{A footnote with two paragraphs.\par Here's the second paragraph.}}
\end{exe}

\end{document}

And the resulting error:

Runaway argument? {An example requiring a footnote.\footnote {A footnote with two parag\ETC. ./test.tex:8: Paragraph ended before \@ex was complete. \par l.8 ...ootnote{A footnote with two paragraphs.\par Here's the second paragra...

?

Is it possible to achieve a multiple-paragraphed footnote inside of a gb4e example, or is there a workaround that would allow me to retain the use of gb4e?

Answer 1

You can change \par onto \endgraf. (The height of the page is intentionally reduced on a picture).

\documentclass{article}

\usepackage{gb4e}

\begin{document}

\begin{exe}
 %   \ex[]{An example requiring a footnote\footnote{A footnote with two paragraphs.\par Here's the second paragraph.}}
\ex[]{An example requiring a footnote\footnote{A footnote with two paragraphs.\endgraf Here's the second paragraph.}}
\end{exe}

\end{document}