GNU bug report logs - #31048
27.0.50; With -daemon, "emacsclient -c" on a modified file fails to display frame

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

From: Bruce Stephens <bruce.stephens <at> isode.com>
To: bug-gnu-emacs <at> gnu.org
Subject: 27.0.50; With -daemon, "emacsclient -c" on a modified file fails to
 display frame
Date: Tue, 03 Apr 2018 17:10:25 +0100

On GNU/Linux (with gtk+), after "emacs -Q -daemon", if I do "emacsclient
-c /tmp/foo" (for some existing /tmp/foo) then exit that frame (so the
server still has /tmp/foo in a buffer but has no visible frames), then
"touch /tmp/foo" and try to repeat "emacsclient -c /tmp/foo" the
emacsclient hangs and no frame is displayed.

I would expect a frame to appear with "Revert buffer from file
/tmp/foo?".

The commit that caused the change seems to be the following one, and
reverting that fixes the hang (and returns the behaviour I was
expecting):

commit 49fc040077b33bd1e78ee425575e76329b772a41 (tag: bad, refs/bisect/bad)
Author: Aaron Jensen <aaronjensen <at> gmail.com>
Date:   Fri Feb 16 17:43:04 2018 +0200

    Don't flash previous buffer when connecting with emacsclient
    
    * lisp/server.el (server-execute): Accept lambda for creating
    frame rather than frame.  Ensure newly created tty frame
    initially shows the correct buffer.
    (server-process-filter): Pass a lambda to server-execute to create
    a frame.  (Bug#24218)

In GNU Emacs 27.0.50 (build 1, x86_64-pc-linux-gnu, GTK+ Version 3.22.29)
 of 2018-04-03, modified by Debian built on tinier
Windowing system distributor 'The X.Org Foundation', version 11.0.11906000
System Description: Debian GNU/Linux buster/sid

Recent messages:
Loading /local/brs/.emacs-snapshot...done
Starting Emacs daemon.
frame
frame is x
When done with this frame, type C-x 5 0
frame
frame is x
Quit [2 times]
Composing main Info directory...done
Making completion list...

Configured using:
 'configure --build x86_64-linux-gnu --host x86_64-linux-gnu
 --prefix=/usr --sharedstatedir=/var/lib --libexecdir=/usr/lib
 --localstatedir=/var --infodir=/usr/share/info/emacs-snapshot
 --mandir=/usr/share/man --with-pop=yes
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 --with-crt-dir=/usr/lib/x86_64-linux-gnu/ --with-wide-int --with-x=yes
 --with-x-toolkit=gtk3 --with-imagemagick=yes 'CFLAGS=-DDEBIAN
 -DSITELOAD_PURESIZE_EXTRA=5000 -g -O2' 'CPPFLAGS=-Wdate-time
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Configured features:
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LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT LIBOTF XFT ZLIB
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Important settings:
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Major mode: Fundamental

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Memory information:
((conses 16 500711 18615)
 (symbols 48 36905 1)
 (miscs 40 136 364)
 (strings 32 96210 16847)
 (string-bytes 1 2777162)
 (vectors 16 57274)
 (vector-slots 8 964791 32384)
 (floats 8 374 102)
 (intervals 56 5018 0)
 (buffers 992 16))

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

From: Eli Zaretskii <eliz <at> gnu.org>
To: Bruce Stephens <bruce.stephens <at> isode.com>
Cc: bug-gnu-emacs <at> gnu.org
Subject: Re: 27.0.50;
 With -daemon, "emacsclient -c" on a modified file fails to
 display frame
Date: Thu, 07 Nov 2019 19:20:52 +0200

> From: Bruce Stephens <bruce.stephens <at> isode.com>
> Date: Tue, 03 Apr 2018 17:10:25 +0100
> 
> On GNU/Linux (with gtk+), after "emacs -Q -daemon", if I do "emacsclient
> -c /tmp/foo" (for some existing /tmp/foo) then exit that frame (so the
> server still has /tmp/foo in a buffer but has no visible frames), then
> "touch /tmp/foo" and try to repeat "emacsclient -c /tmp/foo" the
> emacsclient hangs and no frame is displayed.
> 
> I would expect a frame to appear with "Revert buffer from file
> /tmp/foo?".
> 
> The commit that caused the change seems to be the following one, and
> reverting that fixes the hang (and returns the behaviour I was
> expecting):
> 
> commit 49fc040077b33bd1e78ee425575e76329b772a41 (tag: bad, refs/bisect/bad)
> Author: Aaron Jensen <aaronjensen <at> gmail.com>
> Date:   Fri Feb 16 17:43:04 2018 +0200
> 
>     Don't flash previous buffer when connecting with emacsclient

Thanks, I've now reverted that commit.  Please see that your problem
is solved.

Message #11 received at 31048 <at> debbugs.gnu.org (full text, mbox):

From: Bruce Stephens <bruce.stephens <at> isode.com>
To: Eli Zaretskii <eliz <at> gnu.org>
Cc: 31048 <at> debbugs.gnu.org
Subject: Re: 27.0.50; With -daemon, "emacsclient -c" on a modified file
 fails to display frame
Date: Fri, 08 Nov 2019 11:54:22 +0000

Eli Zaretskii <eliz <at> gnu.org> writes:

[...]

>> commit 49fc040077b33bd1e78ee425575e76329b772a41 (tag: bad, refs/bisect/bad)
>> Author: Aaron Jensen <aaronjensen <at> gmail.com>
>> Date:   Fri Feb 16 17:43:04 2018 +0200
>> 
>>     Don't flash previous buffer when connecting with emacsclient
>
> Thanks, I've now reverted that commit.  Please see that your problem
> is solved.

Yes, I can confirm that my problem is fixed now.

Message #16 received at 31048-done <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Bruce Stephens <bruce.stephens <at> isode.com>
Cc: 31048-done <at> debbugs.gnu.org
Subject: Re: 27.0.50; With -daemon, "emacsclient -c" on a modified file
 fails to display frame
Date: Fri, 08 Nov 2019 15:41:36 +0200

> From: Bruce Stephens <bruce.stephens <at> isode.com>
> Cc: 31048 <at> debbugs.gnu.org
> Date: Fri, 08 Nov 2019 11:54:22 +0000
> 
> >>     Don't flash previous buffer when connecting with emacsclient
> >
> > Thanks, I've now reverted that commit.  Please see that your problem
> > is solved.
> 
> Yes, I can confirm that my problem is fixed now.

Thanks for testing, I'm therefore closing this bug.

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