From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 88256 invoked by alias); 23 Jun 2019 18:41:16 -0000 Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Received: (qmail 88249 invoked by uid 89); 23 Jun 2019 18:41:16 -0000 Authentication-Results: sourceware.org; auth=none X-Spam-SWARE-Status: No, score=-2.2 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-f66.google.com Received: from mail-lf1-f66.google.com (HELO mail-lf1-f66.google.com) (209.85.167.66) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with ESMTP; Sun, 23 Jun 2019 18:41:14 +0000 Received: by mail-lf1-f66.google.com with SMTP id y17so8415456lfe.0 for ; Sun, 23 Jun 2019 11:41:14 -0700 (PDT) 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=yDwlvpluOpTw//rrkBa+Iv2GZpvoc0jlXuv9zd0+6r4=; b=soezLujd7arJLRAarHgf0WeklKBCtM+IlQVrZH509kKixMNtXSXyYeYEDEyk1Td/J3 LOwLAwcHR4C8QStt6k1n4R3opqlLdGQWEDlXLWjTiHrJ+TpG8gJxHyZ3CT7gSuGl8qE1 imQk1G2H6MCKKZGF95F6vMjjU0IPggPeMOH70jND0tl48oOjy5q78pPnWBKkie1kttFq LehdXOzThWPtSjvi8Jt5fpJVXaKqifMii4Rjn7RgUpBpiW/4fyG+xzPs+DR6m10C9kqB fVv7eirHV31fSPyUxW+0o/dRrev7/Ay2hVw6cOG2rL89ovuNzSleM6jeYjSQIT3tiAv2 HtiQ== MIME-Version: 1.0 References: <5fa8b89e-1a9d-2619-f49f-c1680d587148@dronecode.org.uk> In-Reply-To: <5fa8b89e-1a9d-2619-f49f-c1680d587148@dronecode.org.uk> From: Philippe Date: Sun, 23 Jun 2019 18:41:00 -0000 Message-ID: Subject: Re: Bug in libX11 or something near ? To: Jon Turney Cc: The Cygwin Mailing List Content-Type: text/plain; charset="UTF-8" X-IsSubscribed: yes X-SW-Source: 2019-06/txt/msg00203.txt.bz2 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 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