X-Recipient: archive-cygwin AT delorie DOT com
DomainKey-Signature: a=rsa-sha1; c=nofws; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:mime-version:references:in-reply-to:from:date
	:message-id:subject:to:cc:content-type; q=dns; s=default; b=X0RH
	M4LUoz4Aq+yRemFK7hILUZDZ7RLHVCx0DyCLNzmkvGZXrkBOC9yu7iZpyPq1oBmr
	wa6EWnqSDiY9WScUFUCCZ7eCMtgB/bc3vLxTmYWjDmF36nTVakEONDEtf/TBQmmd
	NdXqvoh5g87c/+Dcf8Edljh3KeJ1nD29adA5apQ=
DKIM-Signature: v=1; a=rsa-sha1; c=relaxed; d=sourceware.org; h=list-id
	:list-unsubscribe:list-subscribe:list-archive:list-post
	:list-help:sender:mime-version:references:in-reply-to:from:date
	:message-id:subject:to:cc:content-type; s=default; bh=tSJ5+82DV+
	4UfOnDVo6ovJuAngQ=; b=LG3L5VQblM3G8uxiMJc3UmPW1llNcr6jBVW8bZRc1h
	te9NWtfw9W499JkX2xq0F3Fk3dkcrXzEJEJO0q2dyJJFey7yCDXkm4PXI0OCMmZo
	jKhhjiPthltEHmimTmdP2DiFBb0+9gx7tEZxGCEJ/Z9M7O190ZGPEEzvuMO3nHyR
	A=
Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm
List-Id: <cygwin.cygwin.com>
List-Subscribe: <mailto:cygwin-subscribe AT cygwin DOT com>
List-Archive: <http://sourceware.org/ml/cygwin/>
List-Post: <mailto:cygwin AT cygwin DOT com>
List-Help: <mailto:cygwin-help AT cygwin DOT com>, <http://sourceware.org/ml/#faqs>
Sender: cygwin-owner AT cygwin DOT com
Mail-Followup-To: cygwin AT cygwin DOT com
Delivered-To: mailing list cygwin AT cygwin DOT com
Authentication-Results: sourceware.org; auth=none
X-Spam-SWARE-Status: No, score=-2.1 required=5.0 tests=AWL,BAYES_00,FREEMAIL_FROM,HTML_MESSAGE,RCVD_IN_DNSWL_NONE,SPF_PASS autolearn=ham version=3.3.1 spammy=H*c:alternative, View, uploaded
X-HELO: mail-lf1-f54.google.com
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;        d=gmail.com; s=20161025;        h=mime-version:references:in-reply-to:from:date:message-id:subject:to         :cc;        bh=+i53jNWgll0lmF5JnyomgjIKrlvvxik2z8rqyfF6e8I=;        b=ZcrtnSRbz2ACvBeEpEWv/Q1GqmH8zL4s1nZC41eGbv1plPTxoRLVpmyDR66NF8Q67H         kjUOHaANOLBmT410EwdXCgj83WcMU1QtMhqKXKIM6iGCKjtwbhjXsd8PRqQ+Lqg8j8Bw         VSxcHRD+Ow6Bjn3st7WBcq+KrePgTww9hnc17gWqACQ0O2NcMx5TdzFT5fEMoE1H1wR7         WCQ19RmLeJghzRP2Bhbw0m7D/om0d7ygb2V/dMrtSfvnZGb8/bQcjDAiywKImiZlQioJ         BPpBInblzndVZVPXblSdaRtIXF80k1aqTtYWLAiZpk4PxciRuT1c6mFRdnRHs4lsHqZM         pVcg==
MIME-Version: 1.0
References: <CAC-34C0eHbNVnKT9HV1JGd3MJ4R=njABKWavXkiYLAUkjcXvKQ AT mail DOT gmail DOT com> <5fa8b89e-1a9d-2619-f49f-c1680d587148 AT dronecode DOT org DOT uk> <CAC-34C0AASSBxZQC=Xf2398K5K0hCnTPDoJJ=kgEu74enj=2UA AT mail DOT gmail DOT com>
In-Reply-To: <CAC-34C0AASSBxZQC=Xf2398K5K0hCnTPDoJJ=kgEu74enj=2UA@mail.gmail.com>
From: Philippe <philippe DOT raven AT gmail DOT com>
Date: Mon, 24 Jun 2019 09:28:39 +0200
Message-ID: <CAC-34C30sppjHOB9L21EHGLpqHefRt5N2Vxzn-=vhBfV14-jDA@mail.gmail.com>
Subject: Re: Bug in libX11 or something near ?
To: Jon Turney <jon DOT turney AT dronecode DOT org DOT uk>
Cc: The Cygwin Mailing List <cygwin AT cygwin DOT com>
Content-Type: text/plain; charset="UTF-8"
X-IsSubscribed: yes

Hi Jon,
I just tested your snapshot on some software (including k3b, paraview and
some others), and no more crashes !

Thanks a lot for this fix :)

I guess you can release it on cygwin asap !

Thanks again for this fast work.

regards,
Philippe

On Sun, Jun 23, 2019 at 8:41 PM Philippe <philippe DOT raven AT gmail DOT com> wrote:

> Hi Jon,
> glad to view an answer !
> Just for your information, since I posted, I did some others tests, and I
> can reproduce it with k3b (which use qt4) but NOT with kcalc (which use
> qt5).
> Then I tried some little python tests from Envisage for qt5 and wasn't
> able to reproduce this crash.
>
> So I guess there's something wrong with qt4.
>
> Tomorrow I'll try your snapshot to confirm or not your fix !
>
> Thanks for your time.
>
> On Sun, Jun 23, 2019 at 7:57 PM Jon Turney <jon DOT turney AT dronecode DOT org DOT uk>
> wrote:
>
>> On 18/06/2019 17:07, Philippe wrote:
>> > I'm using Cygwin/X and identified a critical bug using some piece of
>> > software.
>> > I don't really know where to begin, but I'm able to crash some
>> applications
>> > via the application's menu, only with Cygwin/X (no crash with Xming,
>> and no
>> > crash under any Linux distributions).
>> >
>> > For information, It goes through VirtualGL. I'll give the example on
>> how to
>> > reproduce it with a free software : Paraview (under linux).
>> >
>> > So you open Paraview, then clic on "View" > show the "Toolbars" submenu,
>> > then you move your mouse directly on the "Sources" or "Edit" menu, then
>> it
>> > crashes immediately. The only error message in the linux shell (from
>> where
>> > it was launched) is "paraview: Fatal IO error: client killed".
>> >
>> > I got those lines in the XWin.0.log file :
>> > SetupSysMenu: GetSystemMenu() failed for HWND 0x130746
>> > winTopLevelWindowProc - WM_DESTROY - WM_WM_KILL
>>
>> Thanks for reporting this problem, and the clear reproduction steps.
>>
>> This is an interesting bug in the Cygwin X server's multiwindow mode. It
>> seems that under some circumstances, when removing a WM_TRANSIENT_FOR
>> window which in turn had a child WM_TRANSIENT_FOR window (e.g. a menu
>> which has a sub-menu), the X server's integrated WM would get confused
>> and think that the main window had been closed (so terminating the
>> application).
>>
>> I've has a go at fixing this and uploaded a snapshot at [1].  Perhaps
>> you could try that and see if it improves things for you?
>>
>> (I guessed you are using 64-bit Cygwin. If you need a 32-bit build
>> instead, please let me know and I'll generate one)
>>
>> [1]
>>
>> ftp://cygwin.com/pub/cygwinx/x86_64/XWin.20190623-git-210c90b328cf8f18.exe.bz2
>>
>> --
>> Jon Turney
>> Volunteer Cygwin/X X Server maintainer
>>
>

--
Problem reports:       http://cygwin.com/problems.html
FAQ:                   http://cygwin.com/faq/
Documentation:         http://cygwin.com/docs.html
Unsubscribe info:      http://cygwin.com/ml/#unsubscribe-simple