bug#81522: 32.0.50; dired-auto-toggle-b-switch problem with subdirectory and custom switches

Ping!  Stephen, could you please chime in?

> Cc: [email protected]
> Date: Sat, 01 Aug 2026 12:53:31 +0300
> From: Eli Zaretskii <[email protected]>
> 
> > From: Filipp Gunbin <[email protected]>
> > Date: Thu, 30 Jul 2026 18:19:38 +0300
> > 
> > This is a follow up to bug#81295, the relevant discussion is starting
> > from this message:
> > https://debbugs.gnu.org/cgi/bugreport.cgi?bug=81295#20.
> > 
> > In particular, here's some analysis and a possible way of fixing it:
> > https://debbugs.gnu.org/cgi/bugreport.cgi?bug=81295#29.
> > 
> > 
> > - mkdir -p ~/tmp/1/2
> > 
> > - emacs -Q -nw --eval "(setopt dired-auto-toggle-b-switch t)"
> > 
> > - C-x d ~/tmp/1 RET
> > 
> > - Create file with newline in name in subdir: M-! touch "2/a\nb.txt"
> >   (C-q C-j for '\n')
> > 
> > - Type C-u i RET on directory '2' to open it in the same buffer.  In
> >   bug#81295 the case of just "i" was fixed, this bug is about the case
> >   with custom switches.
> > 
> > - Observe that the subdir is not inserted at all, and a warning is
> >   displayed.  This happens only when 2 contains file with newlines.
> > 
> > Thanks.
> 
> Thanks, adding Stephen to the discussion.
> 
> > In GNU Emacs 32.0.50 (build 17, aarch64-apple-darwin25.5.0, NS
> >  appkit-2685.60 Version 26.5.2 (Build 25F84)) of 2026-07-30 built on
> >  mac2598
> > Repository revision: fb6ad8aa780df52b01dc018a283b11db33ded906
> > Repository branch: master
> > System Description: macOS 26.5.2
> > 
> > 
> > 
> > 
> 
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