bug#37496: 27.0.50; C-s failing to search

[Eli Zaretskii]

> Date: Wed, 25 Sep 2019 22:45:22 +0200
> From: Jean Louis <bugs@gnu.support>
> Cc: 37496@debbugs.gnu.org
> 
> > > I have noticed that C-s, including C-M-s is failing to search. And
> > > this happens in all buffers. It is strange. I have not changed any
> > > settings in the mean time.
> > > 
> > > I was using mostly Dired buffers, and C-x C-q to edit Dired
> > > buffers, that is what I remember.
> > > 
> > > I do not know how to reproduce this. Emasc daemon was running less
> > > than 24 hours.
> > 
> > What does C-h l say after you press those searching keys?
> 
> It is happening again. I did nothing special, did not change any
> settings. Suddenly I cannot search any more in any of the
> buffers. This is serious bug.
> 
> I just know that I was often using within Dired C-x C-q to edit files
> in Dired, and often quit with C-c C-c, that is what I can remember
> being somewhat unusual. Now I cannot search, and I do not know what to
> do else but to restart daemon.
> 
> I will keep this way for a while if you have some idea on how to find
> what is wrong here.

I see nothing wrong, though.  The "C-h l" output says that C-s does
invoke isearch-forward.  So maybe you should describe in much more
detail what keys you type and what happens as result that makes you
unable to search.