File compiles with 2.3.x but not with master

[Pavel Sanda]

On Tue, Jan 16, 2024 at 01:00:44PM -0500, Scott Kostyshak wrote:
> The attached .lyx file (put the my.cnf file in the same directory) compiles with 2.3.x but not with master.
> 
> This issue was reported by Eberhard.
> 
> I currently can't compile old enough commits to bisect.
> 
> Can anyone take a look?

bisect leads to:

commit 0bf88651229bddc34b9856c7fa025245aa4246b8 (refs/bisect/bad)
Author: Juergen Spitzmueller <spitz at lyx.org>
Date:   Mon Feb 19 17:15:31 2018 +0100

    escape label in included listings
    
    Also use docstring rather than string.
    
    Fixes part of #10544

P