Qt6 Trying to construct an instance of an invalid type, type id: 1024

Dariusz

Hey

I just ported to Qt6 and I'm getting bombarded with > Trying to construct an instance of an invalid type, type id: 1024 / + a lot more ids.

In the past I was using stuff like >

    //qRegisterMetaTypeStreamOperators<icVecInt>("icVecInt");
    //qRegisterMetaTypeStreamOperators<icVecFloat>("icVecFloat");
    //qRegisterMetaTypeStreamOperators<icVecDouble>("icVecDouble");

//qRegisterMetaTypeStreamOperators<QVector<int>>("QVector<int>");

+a lot more registers. But they all seem to be deprecated now. But yet my QVariants break :- (

How can I properly address it?

Im totally lost with QVariant and QMetaType so this is all black magic to me :/

TIa

Christian Ehrlicher

Then call qRegisterMetaType<> for them which you should also have done for Qt5 already.

Dariusz

@Christian-Ehrlicher Yes I had them set early in the code. They are still in Qt6 so I did not touch them. But I still got those issues. I'm stuck at it for an entire day now.
When Im deserializing a byteArray and load it into QMap<int, QMap<int, QVariant>> I keep getting those issues. Im deserializing custom treeItem.
hmmmm I need to make a standalone example & post it here. Any idea how to narrow down object type?>

######
			WARNING: Trying to construct an instance of an invalid type, type id: 1024
 (\Users\qt\work\qt\qtbase\src\corelib\kernel\qmetatype.cpp:2901, const class QtPrivate::QMetaTypeInterface *__cdecl interfaceForType(int))
######


######
			WARNING: Trying to construct an instance of an invalid type, type id: 1768117861
 (\Users\qt\work\qt\qtbase\src\corelib\kernel\qmetatype.cpp:2901, const class QtPrivate::QMetaTypeInterface *__cdecl interfaceForType(int))
######

I got lots of these errors :/

Martin Burchell

@Dariusz Did you ever figure out the problem? I'm seeing something similar having moved to Qt6.2