bug#55031: Recursive Load - tramp.elc - tramp-file-name-structure

[Michael Albinus]

"T. C. Quinn" via "Bug reports for GNU Emacs, the Swiss army knife of
text editors" <bug-gnu-emacs@gnu.org> writes:

Hi,

> When I use Emacs to open any file that's in my zfs snapshots directory
> (<dataset>/.zfs/snapshot) folder, it does not open the file and prints
> out the following error:
>
> File mode specification error: (error ‘tramp-file-name-structure’
> didn’t match!)
> Recursive load: "/usr/share/emacs/26.3/lisp/net/tramp.elc",
> "/usr/share/emacs/26.3/lisp/net/tramp.elc",
> "/usr/share/emacs/26.3/lisp/net/tramp.elc",
> "/usr/share/emacs/26.3/lisp/net/tramp.elc",
> "/usr/share/emacs/26.3/lisp/net/tramp.elc"
>
> This happens in all modes: batch, GUI and console (-nw)  modes.
>
> Although the .zfs/snapshot directory is read only, I have a valid a
> usecase to leverage emacs excellent language support in batch mode for
> a tool I'm writing.
>
> Environment:
> OS: Ubuntu 20.04.4 LTS
> Emacs: 26.3
> ~/.emacs.el: (none)
> ~/.emacs.d: (none)
>
> WIP: https://github.com/JavaScriptDude/EmacsComStrip

Could you please provide a minimal recipe for reproduction? Starting
with "emacs -Q".

Furthermore, the error message

--8<---------------cut here---------------start------------->8---
File mode specification error: (error ‘tramp-file-name-structure’ didn’t match!)
--8<---------------cut here---------------end--------------->8---

looks like a (data) version mismatch. Does it help to remove "~/.emacs.d/tramp"?

Best regards, Michael.