GNU bug report logs - #56963
29.0.50; trampified make-empty-file on macOS

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Package: emacs;

Reported by: dick.r.chiang <at> gmail.com

Date: Thu, 4 Aug 2022 00:35:02 UTC

Severity: normal

Found in version 29.0.50

Fixed in version 29.1

Done: Michael Albinus <michael.albinus <at> gmx.de>

Bug is archived. No further changes may be made.

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Report forwarded to bug-gnu-emacs <at> gnu.org:
bug#56963; Package emacs. (Thu, 04 Aug 2022 00:35:02 GMT) Full text and rfc822 format available.
Acknowledgement sent to dick.r.chiang <at> gmail.com:
New bug report received and forwarded. Copy sent to bug-gnu-emacs <at> gnu.org. (Thu, 04 Aug 2022 00:35:02 GMT) Full text and rfc822 format available.

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

From: dick.r.chiang <at> gmail.com
To: bug-gnu-emacs <bug-gnu-emacs <at> gnu.org>
Subject: 29.0.50; trampified make-empty-file on macOS
Date: Wed, 03 Aug 2022 16:53:08 -0400

Someone with a mac might try `make test/lisp/net/tramp-tests`
to verify the new tramp-test10-write-region (21afc26) works
as well as it does on linux.

I get this consistently in a macOS 11.6.8 cloud env I've no
control over:

Test tramp-test10-write-region condition:
    (ert-test-failed
     ((should
       (string-equal
	(buffer-string)
	""))
      :form
      (string-equal "-n \n" "")
      :value nil :explanation
      (arrays-of-different-length 4 0 "-n \n" "" first-mismatch-at 0)))



In Commercial Emacs 0.3.1snapshot 2f899ba in dev (upstream 29.0.50, x86_64-pc-linux-gnu) built on dick
Repository revision: 2f899bac86a9d6ca94db931da9407a7f35745b8a
Repository branch: dev
Windowing system distributor 'The X.Org Foundation', version 11.0.12013000
System Description: Ubuntu 20.04.4 LTS

Configured using:
 'configure WERROR_CFLAGS=-Werror --prefix=/home/dick/.local
 --with-tree-sitter CC=gcc-10
 PKG_CONFIG_PATH=/home/dick/.local/lib/pkgconfig CXX=gcc-10'
Configured features:
CAIRO DBUS FREETYPE GIF GLIB GMP GNUTLS GSETTINGS HARFBUZZ JPEG JSON
TREE_SITTER LCMS2 LIBSELINUX LIBXML2 MODULES NOTIFY INOTIFY PDUMPER PNG
RSVG SECCOMP SOUND THREADS TIFF TOOLKIT_SCROLL_BARS WEBP X11 XDBE XIM
XINPUT2 XPM GTK3 ZLIB
Important settings:
  value of $LANG: en_US.UTF-8
  locale-coding-system: utf-8-unix

Major mode: Magit Rev

Minor modes in effect:
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Memory information:
((conses 16 2609419 243763)
 (symbols 48 58503 0)
 (strings 32 302230 64066)
 (string-bytes 1 9419838)
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Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#56963; Package emacs. (Thu, 04 Aug 2022 05:30:02 GMT) Full text and rfc822 format available.

Message #8 received at 56963 <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: dick.r.chiang <at> gmail.com
Cc: 56963 <at> debbugs.gnu.org
Subject: Re: bug#56963: 29.0.50; trampified make-empty-file on macOS
Date: Thu, 04 Aug 2022 07:28:58 +0200

[Message part 1 (text/plain, inline)]
dick.r.chiang <at> gmail.com writes:

Hi,

> Someone with a mac might try `make test/lisp/net/tramp-tests`
> to verify the new tramp-test10-write-region (21afc26) works
> as well as it does on linux.
>
> I get this consistently in a macOS 11.6.8 cloud env I've no
> control over:
>
> Test tramp-test10-write-region condition:
>     (ert-test-failed
>      ((should
>        (string-equal
> 	(buffer-string)
> 	""))
>       :form
>       (string-equal "-n \n" "")
>       :value nil :explanation
>       (arrays-of-different-length 4 0 "-n \n" "" first-mismatch-at 0)))

I'd like to test, but I have no mac. Could you please instrument the
respective code snippet in `tramp-test10-write-region':


[Message part 2 (text/plain, inline)]
diff --git a/test/lisp/net/tramp-tests.el b/test/lisp/net/tramp-tests.el
index 63ccd05a26..18c1e509ca 100644
--- a/test/lisp/net/tramp-tests.el
+++ b/test/lisp/net/tramp-tests.el
@@ -2483,6 +2483,7 @@ tramp-test10-write-region

 	    ;; Write empty string.  Used for creation of temprorary files.
 	    ;; Since Emacs 27.1.
+            (tramp--test-instrument-test-case 10
 	    (when (fboundp 'make-empty-file)
 	      (with-no-warnings
 		(should-error
@@ -2492,7 +2493,7 @@ tramp-test10-write-region
 		(make-empty-file tmp-name)
 		(with-temp-buffer
 		  (insert-file-contents tmp-name)
-		  (should (string-equal (buffer-string) "")))))
+		  (should (string-equal (buffer-string) ""))))))

 	    ;; Write partly.
 	    (with-temp-buffer

[Message part 3 (text/plain, inline)]
Send the resulting tramp-tests.log for analysis.

My glass ball tells me that it could be related to bug#55767.

Best regards, Michael.
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#56963; Package emacs. (Thu, 04 Aug 2022 09:06:02 GMT) Full text and rfc822 format available.

Message #11 received at 56963 <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: dick <dick.r.chiang <at> gmail.com>
Cc: 56963 <at> debbugs.gnu.org
Subject: Re: bug#56963: 29.0.50; trampified make-empty-file on macOS
Date: Thu, 04 Aug 2022 11:04:55 +0200

dick <dick.r.chiang <at> gmail.com> writes:

Hi,

> Oh, it's probably just "echo -n" not being portable in
> tramp-sh-handle-write-region.  I attach the instrumented log
> as per your instructions.

Thanks. Well, there is a missing space in the command:

> 2022-08-04T08:34:37.0618380Z 08:29:48.506172 tramp-send-command (6) # echo -n "">/var/folders/24/8k48jl6d249_n_qfxwsl6xvm0000gn/T/tramp-testB8ibE4

Would it work if the command is

--8<---------------cut here---------------start------------->8---
echo -n "" >/var/folders/24/8k48jl6d249_n_qfxwsl6xvm0000gn/T/tramp-testB8ibE4
--8<---------------cut here---------------end--------------->8---

If not, what else would be portable? Something like this?

--8<---------------cut here---------------start------------->8---
cat </dev/null >/var/folders/24/8k48jl6d249_n_qfxwsl6xvm0000gn/T/tramp-testB8ibE4
--8<---------------cut here---------------end--------------->8---

Best regards, Michael.
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#56963; Package emacs. (Thu, 04 Aug 2022 09:17:02 GMT) Full text and rfc822 format available.

Message #14 received at 56963 <at> debbugs.gnu.org (full text, mbox):

From: dick <dick.r.chiang <at> gmail.com>
To: Michael Albinus <michael.albinus <at> gmx.de>
Cc: 56963 <at> debbugs.gnu.org
Subject: Re: bug#56963: 29.0.50; trampified make-empty-file on macOS
Date: Thu, 04 Aug 2022 04:45:12 -0400

[Message part 1 (text/plain, inline)]
Oh, it's probably just "echo -n" not being portable in
tramp-sh-handle-write-region.  I attach the instrumented log
as per your instructions.


[3.txt (text/plain, attachment)]
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#56963; Package emacs. (Thu, 04 Aug 2022 09:35:01 GMT) Full text and rfc822 format available.

Message #17 received at 56963 <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: dick <dick.r.chiang <at> gmail.com>
Cc: 56963 <at> debbugs.gnu.org
Subject: Re: bug#56963: 29.0.50; trampified make-empty-file on macOS
Date: Thu, 04 Aug 2022 11:34:09 +0200

dick <dick.r.chiang <at> gmail.com> writes:

Hi,

> The `cat` invocation sounds like a good bet.  I've always been
> nonplussed by `echo`.  Also, https://apple.stackexchange.com/q/173836.

Thanks for confirmation. Let me do some regression tests with other
remote targets, and if successful I'll commit.

Best regards, Michael.
Information forwarded to bug-gnu-emacs <at> gnu.org:
bug#56963; Package emacs. (Thu, 04 Aug 2022 10:47:01 GMT) Full text and rfc822 format available.

Message #20 received at 56963 <at> debbugs.gnu.org (full text, mbox):

From: dick <dick.r.chiang <at> gmail.com>
To: Michael Albinus <michael.albinus <at> gmx.de>
Cc: 56963 <at> debbugs.gnu.org
Subject: Re: bug#56963: 29.0.50; trampified make-empty-file on macOS
Date: Thu, 04 Aug 2022 05:25:28 -0400

The `cat` invocation sounds like a good bet.  I've always been
nonplussed by `echo`.  Also, https://apple.stackexchange.com/q/173836.
Reply sent to Michael Albinus <michael.albinus <at> gmx.de>:
You have taken responsibility. (Thu, 04 Aug 2022 16:16:01 GMT) Full text and rfc822 format available.
Notification sent to dick.r.chiang <at> gmail.com:
bug acknowledged by developer. (Thu, 04 Aug 2022 16:16:02 GMT) Full text and rfc822 format available.

Message #25 received at 56963-done <at> debbugs.gnu.org (full text, mbox):

From: Michael Albinus <michael.albinus <at> gmx.de>
To: dick <dick.r.chiang <at> gmail.com>
Cc: 56963-done <at> debbugs.gnu.org
Subject: Re: bug#56963: 29.0.50; trampified make-empty-file on macOS
Date: Thu, 04 Aug 2022 18:14:58 +0200

Version: 29.1

Michael Albinus <michael.albinus <at> gmx.de> writes:

Hi,

>> The `cat` invocation sounds like a good bet.  I've always been
>> nonplussed by `echo`.  Also, https://apple.stackexchange.com/q/173836.
>
> Thanks for confirmation. Let me do some regression tests with other
> remote targets, and if successful I'll commit.

All good, so I have pushed the change to master. Closing the bug.

Best regards, Michael.
bug archived. Request was from Debbugs Internal Request <help-debbugs <at> gnu.org> to internal_control <at> debbugs.gnu.org. (Fri, 02 Sep 2022 11:24:12 GMT) Full text and rfc822 format available.
This bug report was last modified 2 years and 291 days ago.

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