[LyX/master] Fix crash with polyglossia and intitle commands when lang_auto_end is false

[Jürgen Spitzmüller]

Am Donnerstag, den 21.11.2019, 08:24 +0100 schrieb Juergen
Spitzmueller:
> commit ed44bc9b12c0385eccf9323159365ae96b1b4f19
> Author: Juergen Spitzmueller <spitz at lyx.org>
> Date:   Thu Nov 21 08:38:21 2019 +0100
> 
>     Fix crash with polyglossia and intitle commands when
> lang_auto_end is false


Riki, this should go to 2.3.4, if possible.

Jürgen

> ---
>  src/output_latex.cpp |   12 +++++++++++-
>  1 files changed, 11 insertions(+), 1 deletions(-)
> 
> diff --git a/src/output_latex.cpp b/src/output_latex.cpp
> index a349cbd..db56ff6 100644
> --- a/src/output_latex.cpp
> +++ b/src/output_latex.cpp
> @@ -781,6 +781,10 @@ void TeXOnePar(Buffer const & buf,
>  		? nullptr : &paragraphs.at(pit + 1);
>  
>  	bool const intitle_command = style.intitle &&
> style.isCommand();
> +	// Intitle commands switch languages locally, thus increase
> +	// language nesting level
> +	if (intitle_command)
> +		state->nest_level_ += 1;
>  
>  	if (style.pass_thru) {
>  		Font const outerfont = text.outerFont(pit);
> @@ -1454,6 +1458,10 @@ void TeXOnePar(Buffer const & buf,
>  		}
>  	}
>  
> +	// Reset language nesting level after intitle command
> +	if (intitle_command)
> +		state->nest_level_ -= 1;
> +
>  	LYXERR(Debug::LATEX, "TeXOnePar for paragraph " << pit << "
> done; ptr "
>  		<< &par << " next " << nextpar);
>  
> @@ -1645,7 +1653,9 @@ void latexParagraphs(Buffer const & buf,
>  					"$$lang",
>  					mainlang))
>  			<< '\n';
> -		if (using_begin_end)
> +		// If we have language_auto_begin, the stack will
> +		// already be empty, nothing to pop()
> +		if (using_begin_end && !lyxrc.language_auto_begin)
>  			popLanguageName();
>  	}
>  
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