GNU bug report logs - #30874
Displaying char \x274C with Dejavu Sans Mono gives "X protocol error: BadLength (poly request too large or internal Xlib length error) on protocol request 138"

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Message #20 received at 30874 <at> debbugs.gnu.org (full text, mbox):

From: Eli Zaretskii <eliz <at> gnu.org>
To: Jan Synacek <jsynacek <at> redhat.com>
Cc: 30874 <at> debbugs.gnu.org
Subject: Re: bug#30874: 27.0.50; Emacs crashes
Date: Thu, 22 Mar 2018 15:01:20 +0200

> From: Jan Synacek <jsynacek <at> redhat.com>
> Date: Thu, 22 Mar 2018 13:28:56 +0100
> Cc: 30874 <at> debbugs.gnu.org
> 
> > Can you run this in X synchronous mode, so that we see which operation
> > triggers the original X error?  etc/DEBUG tells how to do that under
> > "If you encounter X protocol errors".
> 
> I tried the following but it doesn't work:
> 
> gdb --args ./src/emacs -Q --eval='(setq x-command-line-resources
> "emacs.synchronous: true")' --eval="(switch-to-buffer \"*scratch*\")"
> --eval="(insert-char #x274c)" --eval="(set-fontset-font
> \"fontset-default\" 'unicode \"Dejavu Sans Mono\")"
> --eval="(debug-on-entry 'Fdelete_frame)"

What about adding the -xrm "emacs.synchronous: true" switch to the
Emacs invocation command -- does it also not work?

Thanks.

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