bug#41097: 28.0.50; (dired-toggle-marks) not working after copy

[Jean Louis]

* Arthur Miller <arthur.miller@live.com> [2020-05-08 12:06]:
> I didn what you said, but it worked fine for me.
> 
> One remark is that I don't see any pre-configured shortcut to use with
> C-x 4 (operations on other window), so I created directory and switched
> to other window. Besides that, I did what you said and it worked fine in
> my Emacs started with -Q flag.

Ask somebody else to try. I am using latest git version from Emacs.

emacs -Q

C-x C-f to /tmp directory
C-x 3 to make 2 windows vertical
in other directory, make new directory like /tmp/new
create file in /tmp or choose any file with m, marking it
use C to copy to /tmp/new
C-x o to other window where file is copied, it has C mark
press t to toggle, it is not working

Compare it maybe to my lossage. I cannot know why is it happening and
if you are doing something different.

My lossage;

 C-x C-f                ;; find-file
 C-a                    ;; move-beginning-of-line
 C-d                    ;; delete-char
 <return>               ;; minibuffer-complete-and-exit
 C-x 3                  ;; split-window-right
 C-x o                  ;; other-window
 C-n                    ;; dired-next-line
 C-n                    ;; dired-next-line
 C-n                    ;; dired-next-line
 C-n                    ;; dired-next-line
 C-n                    ;; dired-next-line
 C-n                    ;; dired-next-line
 <return>               ;; dired-find-file
 C-x o                  ;; other-window
 C-x o                  ;; other-window
 d                      ;; dired-flag-file-deletion
 x                      ;; dired-do-flagged-delete
 y                      ;; self-insert-command
 e                      ;; self-insert-command
 s                      ;; self-insert-command
 <return>               ;; exit-minibuffer
 C-x o                  ;; other-window
 n                      ;; dired-next-line
 n                      ;; dired-next-line
 n                      ;; dired-next-line
 n                      ;; dired-next-line
 n                      ;; dired-next-line
 n                      ;; dired-next-line
 n                      ;; dired-next-line
 m                      ;; dired-mark
 C                      ;; dired-do-copy
 <return>               ;; exit-minibuffer
 C                      ;; dired-do-copy
 n                      ;; self-insert-command
 e                      ;; self-insert-command
 <tab>                  ;; minibuffer-complete
 <return>               ;; exit-minibuffer
 C-x o                  ;; other-window
 t                      ;; dired-toggle-marks
 <tab>                  ;; indent-for-tab-command
 C-e                    ;; move-end-of-line
 t                      ;; dired-toggle-marks
 t                      ;; dired-toggle-marks
 t                      ;; dired-toggle-marks
 t                      ;; dired-toggle-marks
 t                      ;; dired-toggle-marks
 M-x                    ;; execute-extended-command
 v                      ;; self-insert-command
 i                      ;; self-insert-command
 e                      ;; self-insert-command
 w                      ;; self-insert-command
 l                      ;; self-insert-command
 <backspace>            ;; delete-backward-char
 -                      ;; self-insert-command
 l                      ;; self-insert-command
 o                      ;; self-insert-command
 s                      ;; self-insert-command
 <tab>                  ;; minibuffer-complete
 <return>               ;; minibuffer-complete-and-exit