Error: "Must construct a QApplication before a QWidget"

[Tomaz Canabrava]

On Sat, Jun 24, 2017 at 10:28 PM, Lubomir I. Ivanov <neolit123 at gmail.com>
wrote:

> On 24 June 2017 at 21:29, Dirk Hohndel <dirk at hohndel.org> wrote:
> >
> >> On Jun 24, 2017, at 11:16 AM, Lubomir I. Ivanov <neolit123 at gmail.com>
> wrote:
> >>
> >> i've updated to Qt 5.9.0 today and after building Subsurface on
> >> Windows i'm getting a:
> >>
> >> QWidget: Must construct a QApplication before a QWidget
> >> Invalid parameter passed to C runtime function.
> >> Invalid parameter passed to C runtime function.
> >>
> >> and the app terminates with:
> >> "This application has requested the Runtime to terminate it in an
> unusual way."
> >>
> >> the above error cannot be debugged properly most of the time (e.g.
> asserts).
> >>
> >> https://stackoverflow.com/questions/23804238/debugging-qwidg
> et-must-construct-a-qapplication-before-a-qwidget-invalid-par
> >>
> >> according the comments in the thread we are probably creating a widget
> >> in a header somewhere before the QApplication instance in created.
> >>
> >> i'm trying to hunt what widget / header is causing that.
> >
> > Oh joy - this is one of the things I hate the most about C++
> > Random things happening in random order that make no sense to me.
> > I remember all the cases in which our translations aren't loaded when
> object are instantiated.
> >
> > Thanks for hunting this down.
> >
>
> looks like this error:
> "QWidget: Must construct a QApplication before a QWidget"
>
>
And I guess this is currently being created after we do a QApplication app;
because we only initiate the mainwindow after creating the QApplication. so
I'm a bit lost here.


> is reported the first time a QWebView instance is created.
>
> i've reported an error to the github project from where i've
> downloaded these webkit binaries.
> so it's probably just an error on my end.
>
> lubomir
> --
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