[dired-filter] dired-filter-group-mode breaks batch byte compilation

[ksqsf]

In a directory where there are a number of .el files, mark them, and then press B to byte-compile them.

Expected behavior: Produce a number of .elc files corresponding to each marked .el file.

Actual behavior: Byte-compile the first marked file again and again infinitely.

My dired-filter config is as follows

(use-package dired-filter
  :after (dired)
  :hook ((dired-mode . dired-filter-group-mode))
  :config
  (define-key dired-mode-map "/" dired-filter-map))

Other information:

• Emacs version: 29.0.60 (I can confirm batch compilation works without dired-filter-group-mode)
• Dired-filter version: 20221127.1247 from MELPA

[Fuco1]

I tried this on Emacs 30 (snapshot) and can't reproduce the issue. Is there any other details you can share? For example what are your filters? Maybe there is some bug in the filtering process which would cause infinite loop.

[ksqsf]

My entire config for dired-filter is as follows. The bug can be reproduced using emacs -q + this config.

(use-package dired-filter
  :after (dired)
  :hook ((dired-mode . dired-filter-group-mode)
         (dired-mode . dired-filter-mode))
  :config
  (define-key dired-mode-map "/" dired-filter-map)
  (setq dired-filter-group-saved-groups
        '(("default"
           ("Git"
            (directory . ".git")
            (file . ".gitignore"))
           ("Directory"
            (directory))
           ("PDF"
            (extension . "pdf"))
           ("LaTeX"
            (extension "tex" "bib"))
           ("Code"
            (extension "rs" "c" "cpp" "h" "hpp" "cc" "rb" "py" "el" "html" "js" "css" "jl" "rs" "m" "v" "hs" "lhs" "pl"))
           ("Text"
            (extension "md" "rst" "txt"))
           ("Org"
            (extension "org"))
           ("Archives"
            (extension "zip" "rar" "tar" "gz" "bz2" "xz"))
           ("Images"
            (extension "jpg" "jpeg" "webp" "png" "bmp" "gif" "tiff" "xcf"))))))

[Fuco1]

With your config I can reproduce this on snapshot.

[Fuco1]

Actually I can reproduce it even on Emacs 28. It has to do with dired-byte-compile "refreshing" the buffer, dired-filter reordering the lines and markers moving around :/ This will be very hard to fix.