"item" patch + \bgroup -> "Use of \MT@prot@group doesn't match its definition."

[urrameu]

Description

The patches to "item" apparently cause problems if the item text starts with a \bgroup, resulting in the error "Use of \MT@prot@group doesn't match its definition." This affects pdflatex, xelatex, and lualatex.

Minimal example demonstrating the issue

\documentclass{article}
\usepackage{microtype}
\begin{document}
\begin{itemize}
\item \bgroup Hi there!\egroup
\end{itemize}
\end{document}

As a workaround, if there is something before \bgroup (for example, \null), things work ok. Another workaround is to use \begingroup instead of \bgroup.

[schlcht]

An even simpler workaround would be to just use braces ... but of course I agree that this is a bug that needs to be fixed

[schlcht]

Could you try with

\def\MT@prot@group{\bgroup\afterassignment\MT@prot@get@firstchar\let\MT@temp= }

[urrameu]

Could you try with

\def\MT@prot@group{\bgroup\afterassignment\MT@prot@get@firstchar\let\MT@temp= }

WorksForMe^(TM) :)

However, I will create another related issue that is not solved by this :-/ .

[schlcht]

Thanks for the confirmation!