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bug#19636: [TRAMP] global minor mode hangs connection when accessing fil
From: |
Michael Albinus |
Subject: |
bug#19636: [TRAMP] global minor mode hangs connection when accessing files in :lighter |
Date: |
Wed, 21 Jan 2015 17:15:14 +0100 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/25.0.50 (gnu/linux) |
Philippe Vaucher <philippe.vaucher@gmail.com> writes:
> Hello,
Hi Philippe,
> TRAMP hangs the connection for any new processes in both emacs 24.4
> and emacs from the master branch when a global minor mode uses a
> :lighter which evals `(file-truename default-directory)`.
>
> To reproduce:
>
> M-x find-file buggy-tramp-mode.el
> M-x eval-buffer
> M-x global-buggy-tramp-mode
> M-x find-file /scpx:user@host:/tmp/foo.txt
> M-x async-shell-command ls
>
> The last command (new process) doens't complete and the TRAMP buffer
> shows "Are you awake?". My understanding of the problem is that
> `file-truename` tries to use a not-yet-ready TRAMP connection.
I tried it seriously with several combinations of Tramp parameter
settings; I couldn't reproduce. However, it is dangerous to run
an asynchronous process in parallel to retrieve information via
Tramp. While you run an asynchronous process, Tramp opens a
second connection and remembers this channel. In parallel,
file-truename needs also to retrieve information fron the remote
machine, on the other connection channel. Likely, Tramp might
confuse which connection channel to use.
Maybe you can set tramp-verbose to 6, and rerun your test. The resulting
Tramp trace buffer shall tell us what's up.
> To work around that was tried is to use `tramp-connectable-p` or even
> `file-remote-p` with the appropriate flags, but they both
> (incorrectly?) return true.
(setq buggy-tramp-mode-lighter
'(:eval (format " Projectile[%s]"
(if (file-remote-p default-directory)
default-directory
(file-truename default-directory)))))
> Thanks,
> Philippe
Best regards, Michael.
- bug#19636: [TRAMP] global minor mode hangs connection when accessing files in :lighter, Philippe Vaucher, 2015/01/20
- bug#19636: [TRAMP] global minor mode hangs connection when accessing files in :lighter,
Michael Albinus <=
- bug#19636: [TRAMP] global minor mode hangs connection when accessing files in :lighter, Philippe Vaucher, 2015/01/21
- bug#19636: [TRAMP] global minor mode hangs connection when accessing files in :lighter, Philippe Vaucher, 2015/01/22
- bug#19636: [TRAMP] global minor mode hangs connection when accessing files in :lighter, Michael Albinus, 2015/01/25
- bug#19636: [TRAMP] global minor mode hangs connection when accessing files in :lighter, Philippe Vaucher, 2015/01/25
- bug#19636: [TRAMP] global minor mode hangs connection when accessing files in :lighter, Michael Albinus, 2015/01/25
- bug#19636: [TRAMP] global minor mode hangs connection when accessing files in :lighter, Philippe Vaucher, 2015/01/25