Hello everyone, I've been working for quite some time on a Qt and QtQuick project and I tried the 5.2 alpha release as soon as it got out. However, my project which didn't have any issues running with any previous 5.* release of Qt now crashes with the alpha.
My project is composed of a core application that load Qt plugins through shared libraries. Those shared libraries are C++ backend that are exposed to the Qml Engine so as to be used by a matching QtQuick object loaded by a QtQuick loader. Basically, foreach of my libraries I do : context->setContextProperty(library_name, library_intance); and each library has a associated qml file that is loaded through a loader and can then call the backend as it has been exposed to the Qml Engine (using library_name.my_method). This C++ backend is mainly used to access web services, sql storage and manipulate ListModels (a custom subclass of QAbstractListModel) which are then shown with QtQuick ListView(s). After debugging for quite some time, it appears that when one of those libraries tries to access and manipulate a ListModel that is bound to a qml ListView or Repeater, it produces a SIGSEGV. Debugging with gdb, I found out that from one call to another my model instance would suddenly be marked as inacessible for no obvious reason. On a side note, those models are not registered as qml properties but are returned as QObject* in a Q_INVOKABLE methods of the backend. If I want to use the model in a ListView, I then do : ListView { model : library_name.getMyModel(); .... } I suspect this might be coming from the new V4 engine but I've been looking at JIRA and so far no one as a similar issue. I see several qv4methods in the stack calls preceding the segfault so as V4 is making its debuts with the alpha I can't help but think the issue as something to do with it... Anyway I cannot submit a bug report yet as I don't really know what the issue is. I'd be happy to hear your advice if any of you has encountered some strange behavior like this one with the 5.2 alpha releases Thanks and have a nice week end Paul Lemire _______________________________________________ Development mailing list Development@qt-project.org http://lists.qt-project.org/mailman/listinfo/development