[Interest] Crash when creating QNetworkAccessManager in qt 5.14.x

maitai maitai at virtual-winds.org
Tue Feb 4 08:56:29 CET 2020

Hi all,

While the mail list was broken I did some further experiments:

If I move the creation of QNetworkAccessManager into main.cpp, it also 
crashes, but only if I put it after QApplication app(argc, argv);

The funny part being that if I create a QneworkAccessManager before and 
just delete it, then my regular QNetworkAccessManager instantiated in 
MainWindow does not crash anymore.

So my workaround is in main.cpp:

     QNetworkAccessManager *inet = new QNetworkAccessManager();
     QApplication app(argc, argv);
     delete inet;

And then all is back to OK.

I have tried to reproduce that in a small sample but failed. I have 
build a small app with the same qt modules, the same linked libraries, 
running in the same directory, but failed to reproduce it.

Any idea about what can go wrong here?


Le 01-02-2020 20:11, maitai a écrit :
> Hi all
> I am trying to upgrade from qt5.13.2/MSVC2017 to Qt5.14.1/MSVC2017
> In 5.14.1 (and 0) app is crashing on "QNetWorkAccessManager
> *inetManager = new QNetWorkAccessManager()", while all is OK in
> previous Qt versions
> I cannot debug this on Windows. I have removed all old dlls etc
> (including SSL ones) in the directory where app is running. Obviously
> something is wrong on my side since I cannot believe
> QNetworkAccessManager is broken in Qt5.14.x/Windows..
> Any idea?
> _______________________________________________
> Interest mailing list
> Interest at qt-project.org
> https://lists.qt-project.org/listinfo/interest

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