Crash on master because of cursor position in session

[Kornel Benko]

Am Sat, 15 Jan 2022 10:02:05 -0500
schrieb Scott Kostyshak <skostysh at lyx.org>:

> 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

FWIW, I never use 'lyx' name only. Therefore I do not have any 'lyx.conf' file,
my configs are named
 $  ls -l .config/*/ly*
-rw-rw-r-- 1 kornel kornel 6015 Jun 10  2021 .config/LyX/lyx2.2.conf
-rw-rw-r-- 1 kornel kornel 8997 Jan 12 09:23 .config/LyX/lyx2.3.conf
-rw-rw-r-- 1 kornel kornel 9386 Jan 12 21:08 .config/LyX/lyx2.4.conf

This may be the reason that I did not have these problems.

	Kornel
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