GNU bug report logs - #56628
28.1; dired + tramp/archive gives ibuffer fits

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From: Michael Albinus <michael.albinus <at> gmx.de>
To: Lars Ingebrigtsen <larsi <at> gnus.org>
Cc: 56628 <at> debbugs.gnu.org, Peter Mao <peter.mao <at> gmail.com>
Subject: bug#56628: 28.1; dired + tramp/archive gives ibuffer fits
Date: Sat, 23 Jul 2022 18:28:45 +0200

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Lars Ingebrigtsen <larsi <at> gnus.org> writes:

Hi,

> Peter Mao <peter.mao <at> gmail.com> writes:
>
>> Ibuffer throws an error when an archive file (I've tried zip and tar.gz)
>> is inserted into a Dired buffer (with `dired-maybe-insert-subdir').
>> Recipe for bug and relevant *Messages* below.
>>
>> Actions starting from `emacs -Q`:
>> 1. open directory in Dired with an archive file (C-x d)
>> 2. insert zip contents into Dired buffer with 'i'
>> 3. open Ibuffer (M-x ibuffer)
>
> This leads to the following error:
>
> Debugger entered--Lisp error: (user-error "Method ‘archive’ is not known.")
>   signal(user-error ("Method ‘archive’ is not known."))
>   tramp-error((tramp-file-name "archive" nil nil "file%3A%2F%2F%2Fhome%2Flarsi%2FDownloads%2F4672362..." nil "" nil) user-error "Method `%s' is not known." "archive")
>   apply(tramp-error (tramp-file-name "archive" nil nil "file%3A%2F%2F%2Fhome%2Flarsi%2FDownloads%2F4672362..." nil "" nil) user-error "Method `%s' is not known." "archive")
>   tramp-user-error((tramp-file-name "archive" nil nil "file%3A%2F%2F%2Fhome%2Flarsi%2FDownloads%2F4672362..." nil "" nil) "Method `%s' is not known." "archive")
>   tramp-dissect-file-name("/archive:file%3A%2F%2F%2Fhome%2Flarsi%2FDownloads%...")
>   tramp-file-name-handler(expand-file-name "" "/archive:file%3A%2F%2F%2Fhome%2Flarsi%2FDownloads%...")
>   file-name-case-insensitive-p("")
>   abbreviate-file-name("")
>   ibuffer--abbreviate-file-name("")
>
> The problem seems to stem from tramp throwing an error when calling
> `abbreviate-file-name' in the *tramp/archive...* buffer.  Perhaps
> Michael knows why; added to the CCs.

The default directory of the *tramp/archive...* buffer cannot be
accessed outside the Tramp machinery. The fix is simple, patch appended.

Would it be OK to push this to the emacs-28 branch?

Best regards, Michael.

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