bug#39489: 28.0.50; On Emacs 27, 28, tramp hangs indefinitely

[Benjamin Slade]

Hi Michael,

Thanks for following up on this. (It is most perplexing to me.)

On 2020-02-08T02:31:40-0700, Michael Albinus 
<michael.albinus@gmx.de> wrote:

> Like you, I believe it is a problem with auth-sources.el. I 
> suppose you have only one file, ~/.authinfo.gpg? And you don't 
> have neither ~/.authinfo nor ./netrc? What is the value of 
> auth-sources?

I have a =~/.authinfo.gpg= file (with contents). There is no 
=~/.authinfo= file. There *is* a =~/.netrc= file, but it's empty.

For my regular configuration, the value of =auth-sources= is:

--8<---------------cut here---------------start------------->8---
("~/.authinfo.gpg")
--8<---------------cut here---------------end--------------->8---

For =emacs -q -l tramp-sh=, the value of =auth-sources= is:

--8<---------------cut here---------------start------------->8---
("~/.authinfo" "~/.authinfo.gpg" "~/.netrc")
--8<---------------cut here---------------end--------------->8---


> Could you please run the following test:

> --8<---------------cut 
> here---------------start------------->8---
> # emacs -q -l tramp-sh
> --8<---------------cut 
> here---------------end--------------->8---

Since you specify `#`, I ran as root first, and then also as my 
regular user.

> In Emacs, please evaluate

> --8<---------------cut 
> here---------------start------------->8---
> (progn
>   (dolist (elt (cons "auth-source-search"
>                      (all-completions "tramp-" obarray 
>                      'functionp)))
>     (trace-function-background (intern elt)))
>   (setq auth-source-debug 'trivia))
> --8<---------------cut 
> here---------------end--------------->8---

> After that, pls apply

> --8<---------------cut 
> here---------------start------------->8---
> C-x C-f /sudo:: ;; Cancel it with C-g if necessary
> M-x untrace-all
> --8<---------------cut 
> here---------------end--------------->8---

> There will be a new buffer *trace-output*, which I would like 
> to see.
> I would also like to see your *Messages* buffer, with the 
> traces from
> auth-sources.el. Pls send them as attachment, in order to keep 
> the line
> breaks.

I did the above both as root and as my regular user. I attach the 
results of both.

> *** ATTENTION ***

> The *trace-output* buffer might contain your password, as 
> result of the
> function tramp-read-passwd, and in obfuscated form as result of
> auth-source-search. You should overwrite these strings with 
> "xxx" or
> alike.

I could find no evidence of any of my passwords in this output.


with many thanks,
  —Ben

--
( Dr Benjamin Slade . b.slade@utah.edu . https://lambda-y.net )
( Linguistics . University of Utah . https://linguistics.utah.edu 
)
( office : LNCO 2309 )
`( pgp_fp: ,(21BA 2AE1 28F6 DF36 110A 0E9C A320 BBE8 2B52 EE19))
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regularuser.tramp.txt
Description: Text document

root.tramp.txt
Description: Text document