beamer, verbatim, and `\end{frame}`

Question

as of current TL2018 a minimal beamer/verbatim file containing a line \end{frame} in the verbatim code fails to compile:

\documentclass{beamer}
\usepackage{fancyvrb}
\begin{document}
\begin{frame}[fragile]
\begin{verbatim}
\documentclass{beamer}
\begin{document}
\begin{frame}{My first slide}
Hello World
\end{frame}
\end{document}
\end{verbatim}
  Hello
\end{frame}
\end{document}

If I comment the \end{frame} line in the verbatim block all is fine.

The error is

Runaway argument?
^^M\documentclass{beamer}^^M\begin{document}^^M\begin{frame}{My first\ETC.
! File ended while scanning use of \@xverbatim.
<inserted text> 
                \par 
l.10 \end{frame}

Answer 1

Nesting frames for documenting beamer itself is of course a somewhat special case. Here, you can use the ability to create an 'alternative name' environment.

\documentclass{beamer}
\newenvironment{slide}{\begin{frame}[fragile,environment=slide]}{\end{frame}}
\begin{document}
\begin{slide}
\begin{verbatim}
\documentclass{beamer}
\begin{document}
\begin{frame}{My first slide}
Hello World
\end{frame}
\end{document}
\end{verbatim}
  Hello
\end{slide}
\end{document}