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Subject: Re: Crash X11 with 3 commands
To: cygwin AT cygwin DOT com
References: <CA+2x6-LySp7b3UzNdvnb6bsUujpY+-As5LqQjUtanH_qSD4scQ AT mail DOT gmail DOT com>
Reply-To: cygwin AT cygwin DOT com
Cc: Nem W Schlecht <nemws1 AT gmail DOT com>
From: Jon Turney <jon DOT turney AT dronecode DOT org DOT uk>
Message-ID: <56CCA145.1080706@dronecode.org.uk>
Date: Tue, 23 Feb 2016 18:13:25 +0000
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On 11/12/2015 16:21, Nem W Schlecht wrote:
> I was experimenting with Xterm escape sequences - trying to
> resize/reposition a window while its iconized and found I can crash
> X11 in just 3 escape commands in an Xterm (which I have in a shell
> script):
>
> ---------------------------------------------------------------
> #!/bin/bash -x
>
> # Iconify window
> echo -ne "\e[2t"
>
> # Set height/width to 36x80 and position at +100+100
> # If I do just one of these X11 does *not* crash
>
> # Resize to 36x80.  This one doesn't work, even if I run just it
> # by itself so X11 doesn't crash.  Also, this one has to be first.
> # If I re-position, then change geometry, it doesn't crash.
> echo -ne "\e[8;36;80t"
>
> # The re-position, next, actually does work behind the scenes,
> # if I run just this alone and then de-iconify manually, its in the
> # correct position.
> echo -ne "\e[3;100;100t"
>
> # To de-iconify (doesn't work in Cygwin anyways, unfortunately)
> echo -ne "\e[1t"
> ---------------------------------------------------------------
>
>
> Can anybody else confirm?  (WARNING - if it does, it'll kill all your
> X11 windows!  Be careful.)

Thanks for reporting this.

I was able to reproduce the crash (sporadically), but only when I was 
using  XWin with the -compositewm option.  Are you using that?

-- 
Jon TURNEY
Volunteer Cygwin/X X Server maintainer

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