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Details

Type: Bug
Resolution: Duplicate
Priority: P2: Important
Fix Version/s: None
Affects Version/s: 5.7.0 Beta
Component/s: Quick: Controls 2, Quick: Core Declarative QML
Labels:
None
Environment:
Android 4.4.4, 5.1, 6.0

Description

If I use ItemDelegate with custom contentItem as a delegate in ListView, on scrolling creating some items fail on Android (on Linux it works fine). I also see the following errors:

:-1 ((null)): <Unknown File>: QML VisualDataModel: Error creating delegate

If I import QtQml.Models, error mention DelegateModel instead of VisualDataModel.

Test program:

import QtQuick 2.6
import QtQuick.Controls 2.0

ApplicationWindow {
    visible: true
    width: 640
    height: 480

    ListView {
        anchors.fill: parent
        model: 10000
        delegate: ItemDelegate {
            contentItem: Label {
                text: "Item " + model.index
            }
        }
    }
}

To reproduce, just scroll the list.

I don't see such errors on Qt 5.6.