Crash on master because of cursor position in session

[Scott Kostyshak]

On Sat, Jan 15, 2022 at 10:13:10AM +0100, Kornel Benko wrote:
> Am Fri, 14 Jan 2022 07:50:27 -0500
> schrieb Scott Kostyshak <skostysh at lyx.org>:
> 
> > On Wed, Jan 12, 2022 at 09:24:08AM +0100, Kornel Benko wrote:
> > > Am Tue, 11 Jan 2022 14:43:01 -0500
> > > schrieb Scott Kostyshak <skostysh at lyx.org>:
> > >   
> > > > To reproduce on current master:
> > > > 
> > > > 1. Open the attached file.
> > > > 2. Move cursor to just in front of the second comment inset.
> > > > 3. Exit LyX.
> > > > 4. Open the file again.
> > > > 
> > > > LyX has caught an exception, it will now attempt to save all unsaved documents and
> > > > exit.
> > > > 
> > > > Exception: basic_string::substr: __pos (which is 44) > this->size() (which is 43)
> > > > 
> > > > Can anyone reproduce?
> > > > 
> > > > Scott  
> > > 
> > > Neither with lyx2.4 compiled with -fsanitize flag, nor without.
> > > 
> > > I tried also lyx2.3, but still no crash here.
> > > 
> > > 	Kornel  
> > 
> > Thanks for trying.
> > 
> > I can only reproduce it with a specific ~/.config/LyX/lyx.conf.
> > 
> > If I exit LyX and remove that file, then I can no longer reproduce.
> > 
> > Not sure it's worth looking into since probably that lyx.conf was made with previous
> > dev versions.
> > 
> > Scott
> 
> I think, it is worth to know the specific entry causing the behaviour.
> Maybe the difference between the two conf files could also help.

Makes sense. I will dig some more. I'll try to reproduce on a separate session and narrow it down to which lines in the conf trigger the issue, and perhaps bisect if relevant.

Scott
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