tex2lyx assertion on master

[Enrico Forestieri]

On Wed, Sep 30, 2020 at 09:39:23PM -0400, Scott Kostyshak wrote:
> The following chunk causes a tex2lyx assertion on current master, if I
> paste as LaTeX (or if I save it to a file and import).
> 
> % excerpt from here:
> % https://tex.stackexchange.com/a/280891/12212
> \author[Short Name (U ABC)]{%
>   \texorpdfstring{%
>     \begin{columns}
>       \column{.3333\linewidth}
>       \centering
>       Author 1 \\ Institute 1
>       \column{.3333\linewidth}
>       \centering
>       Author 2 \\ Institute 2
>       \column{.3333\linewidth}
>       \centering
>       Author 3 \\ Institute 3
>     \end{columns}
>  }
>  {Author 1, Author 2, Author 3}
> }

It is not this specific chunk of code. The assertion triggers even when
pasting a single word as LaTeX. Bisect leads to the following commit:

commit 0b7305024a33e6616ef3ae73a0df63c5a62e3d10
Author: Juergen Spitzmueller <spitz at lyx.org>
Date:   Wed Aug 7 16:44:11 2019 +0200

-- 
Enrico