# conflict between Beamer and covington? (Using Beamer 3.50)

Is there a conflict between Beamer (3.50 of 2018/02/20) and covington (1.4 of 2017/05/23)? This (hopefully) simple document:

\documentclass[english]{beamer}
\usepackage{fontspec}
\setmainfont[Mapping=tex-text]{DejaVu Serif}
\setsansfont[Mapping=tex-text]{DejaVu Sans}
\setmonofont{Fira Code}
\setcounter{secnumdepth}{3}
\setcounter{tocdepth}{3}
\usepackage{covington}

\makeatletter

\XeTeXdashbreakstate 0

\newcommand\makebeamertitle{\frame{\maketitle}}%
% (ERT) argument for the TOC
\AtBeginDocument{%
\let\origtableofcontents=\tableofcontents
\def\tableofcontents{\@ifnextchar[{\origtableofcontents}{\gobbletableofcontents}}
\def\gobbletableofcontents#1{\origtableofcontents}
}
\def\glosstr{}
\@ifundefined{linggloss}{%
\newenvironment{linggloss}[2][]{
\def\glosstr{\glt #1}%
\gll #2}
{\glosstr\glend}}{}

\makeatother

\usepackage{polyglossia}
\setdefaultlanguage[variant=american]{english}
\begin{document}
\title{Are Czech conditionals with an infinitival condition all Counterfactual?}
\makebeamertitle
\begin{frame}{And how does it look inCzech?}
\begin{covexamples}
\item real conditions – realistic, achievable, achieved?
\item \begin{linggloss}[If Vašek comes on time we'll make it without any problems.]
Když přijde        Vašek        včas,   tak  to          stihneme      v  pohodě.
If   come-3sg.pres Vašek-nom.sg on time then that-acc.sg make-1pl.pres in ease.
\end{linggloss}
\end{covexamples}
\end{frame}

\end{document}


Leads to error in compilation:

! LaTeX Error: Something's wrong--perhaps a missing \item.

See the LaTeX manual or LaTeX Companion for explanation.
Type  H <return>  for immediate help.
...

l.44


This gloss looks to me exactly like what's on page 7 of http://ftp.cvut.cz/tex-archive/macros/latex/contrib/covington/covington.pdf What's wrong with me?

• Can you reproduce the problem without special fonts? This might increase the number of people who can potentially help you. – user36296 Oct 15 '18 at 21:57
• @samcarter Sure it has nothing to do with fonts. Just delete all \set*font lines. And it is all from covington package. mirrors.nic.cz/tex-archive/macros/latex/contrib/covington/… – mcepl Oct 15 '18 at 22:02
• To find the source of the problem it would be helpful if you could remove all unnecessary code and simply your example to use only the macros from the package instead of your custom wrappers and also include what the expected output is. – user36296 Oct 15 '18 at 22:45
• Just to reiterate what @samcarter is saying: please cook your example down to the relevant ingredients. (And no, we are not asking you to give us instructions which lines we are supposed to delete, please edit your code.) Then I am pretty confident that an answer will emerge. – marmot Oct 16 '18 at 3:37
• Off-topic: the \newcommand\makebeamertitle{\frame{\maketitle}}% is really unnecessary. Simply use \maketitle. If it used outside a frame environment, beamer will automatically create a frame around it. – user36296 Oct 16 '18 at 8:36

The example can be compiled by using a fragile frame.

Unrelated to the problem: your custom \makebeamertitle macro is unnecessary, beamer defines \maketitle to automatically create a frame around the titlepage if \maketitle is used outside a frame environment.

\documentclass{beamer}

\usepackage{covington}

\makeatletter
\def\glosstr{}
\@ifundefined{linggloss}{%
\newenvironment{linggloss}[2][]{
\def\glosstr{\glt #1}%
\gll #2}
{\glosstr\glend}}{}
\makeatother

\title{Are Czech conditionals with an infinitival condition all Counterfactual?}

\begin{document}

\maketitle

\begin{frame}[fragile]
\frametitle{And how does it look inCzech?}
\begin{covexamples}
\item real conditions – realistic, achievable, achieved?
\item \begin{linggloss}[If Vašek comes on time we'll make it without any problems.]
Když přijde        Vašek        včas,   tak  to          stihneme      v  pohodě.
If   come-3sg.pres Vašek-nom.sg on time then that-acc.sg make-1pl.pres in ease.
\end{linggloss}
\end{covexamples}
\end{frame}

\end{document}


• @mcepl You're welcome! – user36296 Oct 17 '18 at 15:28