Debug assert in Qt in Qt/KDE runtime

[Aleix Pol]

On Wed, Nov 28, 2018 at 10:47 AM Michael Thayer <michael.thayer at oracle.com>
wrote:

> 27.11.18 16:50, Aleix Pol wrote:
> > On Mon, Nov 26, 2018 at 5:24 PM Michael Thayer
> > <michael.thayer at oracle.com <mailto:michael.thayer at oracle.com>> wrote:
> >
> >     26.11.18 16:39, Aleix Pol wrote:
> >     > On Thu, Nov 22, 2018 at 11:49 AM Michael Thayer
> >     > <michael.thayer at oracle.com <mailto:michael.thayer at oracle.com>>
> wrote:
> >     >> 16.11.18 15:43, Aleix Pol wrote:
> >     >>> On Fri, Nov 16, 2018 at 9:55 AM Michael Thayer
> >     >>> <michael.thayer at oracle.com <mailto:michael.thayer at oracle.com>>
> >     wrote:
> >     >>>> Hoping that someone involved with the Qt/KDE runtime follows
> >     this list.
> >     >>>>  I hit the following debug assertion with VirtualBox and the Qt
> >     5.11 in
> >     >>>> the runtime:
> >     >>>>
> >     >>>> Qt FATAL: ASSERT failure in QCoreApplication::sendEvent:
> >     "Cannot send
> >     >>>> events to objects owned by a different thread..."
> >     >>>>
> >     >>>> Good to know of course, and we should fix it, but should Qt be
> >     build
> >     >>>> with debug assertions enabled?
> [...]
> > I've been looking deeper into it and we are already building without
> > asserts (i.e. with DQT_NO_DEBUG).
> > https://flathub.org/builds/#/builders/38/builds/548/steps/5/logs/stdio
> >
> > Can you make sure that so is your virtualbox build?
> > Do you have the recipes available?
>
> Is that something you might have changed recently?  I will have a go at
> rebuilding VirtualBox to see if it still happens, and if so can provide
> the recipe.  But it did look like the assertion was in Qt (I see it in
> the Qt source and not in our source!)  By the way, the link you provided
> above was not very clear to me, how can I see from it how you have build
> Qt?  I might be able to save everyone some time if I can take a look
> into things myself.  And I don't suppose you might be defining
> QT_FORCE_ASSERTS?  Or is there somewhere where QT_NO_DEBUG might be
> getting disabled again?  (I will have a quick look in the sources too.)
>
> Regards
> Michael
> --
> Michael Thayer | VirtualBox engineer
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Yes, I looked it up and it definitely looks like the assert is in Qt.

Do you remember if you built against Qt 5.9 or 5.11?

Aleix
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