bug#34192: 26.1; Bash 5.0 breaks TRAMP sudo

[Michael Albinus]

Allen Li <darkfeline@felesatra.moe> writes:

Hi Allen,

> I tried monkey patching tramp-wait-for-regexp to see what the exit status is.

> In my Messages buffer, I found
>
> @@@@@@@@@@@ DEAD 139
>
> A search tells me that this is SIGSEGV.
>
> The corresponding backtrace:

Thanks for the test. Unfortunately, it doesn't show why this happens.

Maybe we could get some more messages from the shell. Could you, pls,
apply the following patch:

diff --git a/lisp/tramp-sh.el b/lisp/tramp-sh.el
index c304fcb..46f467d 100644
--- a/lisp/tramp-sh.el
+++ b/lisp/tramp-sh.el
@@ -658,7 +658,7 @@ foreach $f (@files) {
  }
 }
 print \"ok\\n\"
-' \"$1\" 2>/dev/null"
+' \"$1\""
   "Perl script to produce output suitable for use with
 `file-name-all-completions' on the remote file system.  Escape
 sequence %s is replaced with name of Perl binary.  This string is

Recompile tramp-sh.el, and rerun the test with tramp-verbose 10. Your
patch isn't needed in this scenario.

Best regards, Michael.