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<56670A0B DOT 5080707 AT dronecode DOT org DOT uk> Date: Tue, 8 Dec 2015 13:57:25 -0500 Message-ID: Subject: Re: Fwd: failure notice From: Tom Kacvinsky To: cygwin AT cygwin DOT com Content-Type: text/plain; charset=UTF-8 X-IsSubscribed: yes On Tue, Dec 8, 2015 at 11:55 AM, Tom Kacvinsky wrote: > On Tue, Dec 8, 2015 at 11:49 AM, Jon Turney wrote: >> On 07/12/2015 16:17, Tom Kacvinsky wrote: >>> >>> On Mon, Dec 7, 2015 at 10:24 AM, Tom Kacvinsky wrote: >>>> >>>> On Mon, Dec 7, 2015 at 10:19 AM, Jon Turney wrote: >>>>> >>>>> On 04/12/2015 14:20, Tom Kacvinsky wrote: >>>>>> >>>>>> We have an interesting problem whereby an Linux X client application >>>>>> crashes when running the X server on cygwin. We have a reproducer >>>>>> for the problem, but it is a Qt example application stored in a >>>>>> tarball. >>>>>> >>>>>> We have gathered the other information that would typically be >>>>>> requested. >>>>>> I just need to know the best way of getting this information to the >>>>>> list. >>>>> >>>>> >>>>> >>>>> If the tarball is being rejected by the mailing list, I'd suggest you >>>>> upload >>>>> it to some file hosting site and send a link to the mailing list. >>>>> >>>>> If that is really not possible for you (why?), you may, on this specific >>>>> occasion only, mail it directly to me. >>>> >>>> >>>> Hi Jon, >>>> >>>> That is totally do-able. I will get it on a hosting site and send the >>>> link. >>> >>> >>> Here is the DropBox link. >>> >>> https://www.dropbox.com/s/b6exaxm30j8q318/cygwin-x-repro.zip?dl=0 >> >> >> Sorry, I hadn't noticed that you are describing a crash in the Qt client, >> not the Cygwin X server. >> >> So, firstly, this is a Qt issue. It could be, since you aren't able to reproduce with Qt 4.8.1, but we can with 4.8.5 that we built. See below. >> >> It may well be that the multiwindow mode window manager for the Cygwin X >> server doesn't satisfy some expectation that Qt has (and I would be >> interested to know what that is), but Qt crashing is never the right >> thing to do. >> >> A backtrace of the Qt client when it crashes might be informative. >> > > Will attempt to get one. I recall seeing in our internal bug tracking system > the exact X server error message. Would that be of use? > There is no hard crash with a core dump so I can't get a backtrace. The client dies with no diagnostics - the GUI goes away and we return to the command prompt. >>> Please note it is a Qt reproducer. We have some hard coded paths in >>> the Makefile that you will need to modify. We are using Qt 4.8.6 >>> built on Ubuntu 12.04, 32 bit. >> >> Nevertheless, I tried your reproducer in a Ubuntu 12.04 32-bit VM, but >> wasn't able to observe any crash. >> >> I note that an Ubuntu 12.04 only seems to have Qt 4.8.1. Are you using a >> self-built Qt? > > Yes, we are using a self built Qt, pretty much a stock build, only thing we are > not doing is building the examples and demos. > We can provide the libraries we built and you can set LD_LIBRARY_PATH accordingly. Tom -- 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