bug#16676: 24.3.50; Repeated but random hang

[Eli Zaretskii]

> From: "Jan D." <jan.h.d@swipnet.se>
> Date: Sat, 8 Feb 2014 17:40:21 +0100
> Cc: Lars Ingebrigtsen <larsi@gnus.org>,
>  "16676@debbugs.gnu.org" <16676@debbugs.gnu.org>
> 
> The io error handler is only called for fatal errors.  Any system call 
> related to io in Xlib that fails
> triggers a call to the error handler.  Xlib can not recover from this, so the 
> connection is lost.
> If something writes garbage into Xlibs data, anything can happen.

Is it wise to issue further X calls in this situation?  Maybe we
should skip X calls when we delete the frame as result of such
problems.