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Date: Tue, 8 Dec 2015 11:55:52 -0500
Message-ID: <CAAEKttxPfsi76UGDV2HwdwnqZcZeE5oAax5uC1s4JWu23CC9RQ@mail.gmail.com>
Subject: Re: Fwd: failure notice
From: Tom Kacvinsky <tom DOT kacvinsky AT vectorcast DOT com>
To: cygwin AT cygwin DOT com
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On Tue, Dec 8, 2015 at 11:49 AM, Jon Turney <jon DOT turney AT dronecode DOT org DOT uk> 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 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?

>> 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.

Thanks for your time.

Tom

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