bug#27816: 26.0.50; X protocol error: BadPixmap (invalid Pixmap parameter) on protocol request 55

[Eli Zaretskii]

> Date: Fri, 04 Aug 2017 10:54:03 +0200
> From: martin rudalics <rudalics@gmx.at>
> CC: bugs@gnu.support, 27816@debbugs.gnu.org
> 
>  > If you run Emacs in X synchronized mode and put a breakpoint on
>  > x_error_quitter, can you see why the problem happens?  Which picmap
>  > parameter is invalid?
> 
> No idea how to run a TTY Emacs in X synchronized mode.

etc/DEBUG suggests to evaluate (x-synchronize t).

> Apparently, the shadow calculations for the Xaw3D scroll bars, when
> done from a TTY-started server, are sometimes not digested by X11.

Can you try figuring out why is that?