Subject: 27.1; X protocol error: BadMatch (...) on protocol request 73

From: Francesco Potortì <[email-masked]>
Date: Sat, 28 Nov 2020 20:36:06 +0100

This looks like a regression since it has happened only since using
Emacs 27 (I had Emacs 26 running since a long time).

>From the local machine, I run ssh on the remote one.  I launch Screen
and then I execute Emacs in text mode.  I use Screen remotely via ssh.
>From the text frame I create an X frame running on a remote Xpra server
(which is a sort of Screen running on X), and I use the Xpra client
locally.

So I have an Emacs text frame on Screen and an X frame on a local Xpra
client.

I use (setq browse-url-browser-function 'w3m-browse-url)

Sometimes, when I use browse-url on an http URL, the X frame dies, but the
text frame stays alive and I can relaunch an X frame from there without
problems.  When the X frame dies, it leaves this error message:

X protocol error: BadMatch (invalid parameter attributes) on protocol request 73

Apparently this happens only when w3m does not respond immediately and
the *w3m* buffer displays a message asking to wait, but it only happened
few times until now, so I am not sure.

In GNU Emacs 27.1 (build 1, x86_64-pc-linux-gnu, X toolkit, Xaw3d scroll bars)
 of 2020-11-08, modified by Debian built on x86-ubc-01
Windowing system distributor 'The X.Org Foundation', version 11.0.12008000
System Description: Debian GNU/Linux bullseye/sid

Recent messages:
Expunging deleted messages...done
Saving file /home/pot/Mail/RMAIL...
Wrote /home/pot/Mail/RMAIL
Making completion list...
Quit
Saving file /home/pot/diary...
Preparing diary...done
Wrote /home/pot/diary
user-error: No undo information in this buffer
Report a bug for a [P]ackage or [F]ile: (default P) 
Quit
Configured using:
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Configured features:
XAW3D XPM JPEG TIFF GIF PNG RSVG SOUND GPM DBUS GLIB NOTIFY INOTIFY ACL
LIBSELINUX GNUTLS LIBXML2 FREETYPE HARFBUZZ M17N_FLT LIBOTF XFT ZLIB
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PDUMPER LCMS2 GMP

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Load-path shadows:
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/usr/share/emacs/site-lisp/elpa/debian-el-37/preseed hides /usr/share/emacs/site-lisp/elpa-src/debian-el-37/preseed
/usr/share/emacs/site-lisp/elpa/debian-el-37/deb-view hides /usr/share/emacs/site-lisp/elpa-src/debian-el-37/deb-view
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/usr/share/emacs/site-lisp/elpa/debian-el-37/debian-bug hides /usr/share/emacs/site-lisp/elpa-src/debian-el-37/debian-bug
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/usr/share/emacs/site-lisp/elpa/debian-el-37/debian-autoloads hides /usr/share/emacs/site-lisp/elpa-src/debian-el-37/debian-autoloads
/usr/share/emacs/site-lisp/elpa/dictionary-1.10/dictionary hides /usr/share/emacs/site-lisp/elpa-src/dictionary-1.10/dictionary
/usr/share/emacs/site-lisp/elpa/dictionary-1.10/link hides /usr/share/emacs/site-lisp/elpa-src/dictionary-1.10/link
/usr/share/emacs/site-lisp/elpa/dictionary-1.10/dictionary-pkg hides /usr/share/emacs/site-lisp/elpa-src/dictionary-1.10/dictionary-pkg
/usr/share/emacs/site-lisp/elpa/dictionary-1.10/dictionary-autoloads hides /usr/share/emacs/site-lisp/elpa-src/dictionary-1.10/dictionary-autoloads
/usr/share/emacs/site-lisp/elpa/dictionary-1.10/connection hides /usr/share/emacs/site-lisp/elpa-src/dictionary-1.10/connection
/usr/share/emacs/site-lisp/elpa/gnuplot-mode-20141231/gnuplot hides /usr/share/emacs/site-lisp/elpa-src/gnuplot-mode-20141231/gnuplot
/usr/share/emacs/site-lisp/elpa/gnuplot-mode-20141231/gnuplot-mode-pkg hides /usr/share/emacs/site-lisp/elpa-src/gnuplot-mode-20141231/gnuplot-mode-pkg
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/usr/share/emacs/site-lisp/elpa/markdown-mode-2.4/markdown-mode-autoloads hides /usr/share/emacs/site-lisp/elpa-src/markdown-mode-2.4/markdown-mode-autoloads
/usr/share/emacs/site-lisp/elpa/markdown-mode-2.4/markdown-mode hides /usr/share/emacs/site-lisp/elpa-src/markdown-mode-2.4/markdown-mode
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~/elisp/bibtex hides /usr/share/emacs/27.1/lisp/textmodes/bibtex
~/elisp/octave hides /usr/share/emacs/27.1/lisp/progmodes/octave
/usr/share/emacs/site-lisp/flim/sasl hides /usr/share/emacs/27.1/lisp/net/sasl
~/elisp/rmailout hides /usr/share/emacs/27.1/lisp/mail/rmailout

Features:
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Memory information:
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