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From: mouse@lightning.mcrcim.mcgill.EDU (der Mouse)
Newsgroups: comp.windows.x
Subject: Re:  bug with mit server on sun sparc staion?
Message-ID: <9103060702.AA23733@lightning.McRCIM.McGill.EDU>
Date: 6 Mar 91 07:02:04 GMT
Sender: daemon@athena.mit.edu (Mr Background)
Organization: The Internet
Lines: 32

> I am having alot of trouble with interclient communication.  I am
> trying to use client events.  I think this may be a bug in the X11r4
> (I am new to X and do not know where to post bugs).  My code works
> when run on a sun sparc 1+ running openwindows version 2 X server,
> but not when I run with the MIT x server on the same machine?

> X Error of failed request:  BadValue (integer parameter out of range for operation)
>   Major opcode of failed request:  25 (X_SendEvent)
>   Resource id in failed request:  0xffffffff

This is a bug in your program, which the OW server is letting you get
away with but the MIT server isn't.  You are, I have no doubt, passing
an event-mask of -1 (or ~0, or some other way of specifying "all bits
set").  This is not legal.  From the protocol document:

	SendEvent
[...]
	     event-mask: SETofEVENT

and then, in the appendix giving the encoding,

	SETofEVENT
[...]
	       #xfe000000  unused but must be zero

Thus, 0xffffffff includes all 7 of the disallowed bits; the MIT server
is quite right to generate an error.

					der Mouse

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