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  1. Qt
  2. QTBUG-52955

Regression: ItemDelegate with overriden contentItem in ListView fails to create on Android

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    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.

      Attachments

        1. failed_items.png
          25 kB
          Nikita Krupenko

        Issue Links

          duplicates

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-50992 QQC2: Object destroyed during incubation

          • P1: Critical - Urgent and Important, will STOP the release if matched with set FixVersion field. This includes regressions from the last version that are not edge cases; Data loss; Build issues; All but the most unlikely crashes/lockups/hanging; Serious usability issues and embarrassing bugs & Bugs critical to a deliverable. This is the highest possible priority for requirements.
          • Closed
          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-52096 Qt Quick Controls 2 Button fails creation in GridView

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-53496 Customized Qt.labs ComboBox won't display in an asynchronous Loader

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
          For Gerrit Dashboard: QTBUG-52955
          # Subject Branch Project Status CR V
          161723,2 WIP: Ugly workaround for "Object destroyed during incubation" issues 5.7 qt/qtquickcontrols2 Status: ABANDONED -2 0
          162519,3 WIP: Cancel incubation of replaced delegates 5.7 qt/qtquickcontrols2 Status: DEFERRED -2 0
          162520,3 WIP: Allow canceling incubation 5.7 qt/qtdeclarative Status: ABANDONED -2 0

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              qt.team.quick.subscriptions Qt Quick and Widgets Team
              krnekit Nikita Krupenko
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              3 Vote for this issue
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              Dates

                Created:
                Updated:
                Resolved:

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