GNU bug report logs - #56865
M-x find-dired fails with "Wrong type: processp, nil"

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Message #5 received at submit <at> debbugs.gnu.org (full text, mbox):

From: Paul Pogonyshev <pogonyshev <at> gmail.com>
To: bug-gnu-emacs <at> gnu.org
Subject: M-x find-dired fails with "Wrong type: processp, nil"
Date: Mon, 1 Aug 2022 10:06:50 +0200

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GNU Emacs 29.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 2.24.33,
cairo version 1.16.0) of 2022-07-26

Tested also with `emacs -Q', so this is not a problem of my configuration.

1. Open (a slow) remote connection, with TRAMP
2. Run M-x find-dired RET, arguments not important
3. Internal error "Wrong type: processp, nil" appears

Debugging suggests that it happens in `find-dired-with-command' when
calling `set-process-filter'. Apparently the asynchronously started shell
command started ~30 lines above counts as having finished (?) by then.

Paul

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