bug#57800: TRAMP insert-file-contents now fails for regions

[Michael Albinus]

Paul Pogonyshev <pogonyshev@gmail.com> writes:

Hi Paul,

> Happened again. See attached `BACKTRACE' and `TRAMP-LOG' generated
> after evalling `(setf tramp-verbose 10)'.

I guess you mean setq.

> Note this suspicious entry in the log:
> 10:26:36.864700 tramp-get-remote-tmpdir (1) # File error: Directory
> /ssh:USER@HOST#22222:/ssh:USER@HOST#22222:/tmp not accessible

Yes. And the debug buffer shows us

--8<---------------cut here---------------start------------->8---
> ;; Emacs: 29.0.50 Tramp: 2.6.0-pre -*- mode: outline; coding: utf-8; -*-
> ;; Location: /usr/local/share/emacs/29.0.50/lisp/net/tramp.elc Git: 
> master/5fd8e1cc49d2ebd59219ddf3a691949a22b601f3
> 10:26:36.638086 tramp-handle-insert-file-contents (3) # Inserting 
> ‘/ssh:USER@HOST#22222:/PATH’...
> 10:26:36.639033 tramp-get-connection-property (7) # remote-tmpdir undef; 
> cache used: nil
> 10:26:36.639200 tramp-get-connection-property (7) # tmpdir 
> /ssh:USER@HOST#22222:/tmp; cache used: t
> 10:26:36.639335 tramp-get-connection-property (7) # tmpdir 
> /ssh:USER@HOST#22222:/tmp; cache used: t
--8<---------------cut here---------------end--------------->8---

The value of of "tmpdir" is completely wrong, it must be something like
"/tmp" or so. Tramp doesn't set this connection property anymore; it
takes it from tramp-methods if declared there.

It was set like this prior commit 9ea40b3ddfb of 2022-08-15, likely your
cache did offer this old value. Could you pls apply "M-x
tramp-cleanup-all-connections" in order to clean up the connection
cache, and retry your test?

Best regards, Michael.