bug#30964: python-mode failing "overlapping strings" assertion lately

[Andreas Röhler]

On 17.06.2018 00:36, Noam Postavsky wrote:
> "Daniel Colascione" <dancol@dancol.org> writes:
>
> > So it turns out that it wasn't an off-by-one problem at all.  Instead,
> > python was using (re-search-forward (rx (syntax string-delimiter))), which
> > was matching incorrectly because re-search-forward didn't update syntax as
> > it matched. It didn't do that because regex matching in general wasn't
> > reentrant, and it wasn't reentrant because regex bytecode programs are
> > self-modifying.
> >
> > I checked in some work that makes regex searching update syntax as needed.
>
> It seems there were two separate problems.  The off-by-one error still
> happens after your changes, so I pushed my patch to master.
>
> [1: 05345babc9]: 2018-06-16 18:34:19 -0400
>    Fix off by one error in python-mode assertion (Bug#30964)
>    
> https://git.savannah.gnu.org/cgit/emacs.git/commit/?id=05345babc988060cca540770599282102c34f2a7

Hi folks,

sorry, but as long as syntax-ppss has fundamentally issues, all fixing 
here will be vain. For the very same reason don't be surprised having 
not "found a reliable test case".

Cheers,
Andreas