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  1. Qt
  2. QTBUG-96167

Ownership of C++ owned object flips when added to ListModel

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    • 219ca3bf2be65fb4f1741bdc7b53d6dc4a41dd31 (qt/qtdeclarative/dev) 784aad8fd0387e11297cd27ed814e875dc5f914b (qt/qtdeclarative/6.2), 718f3469f (dev), 749470e6b (tqtc/lts-6.2), 389110675 (6.5), a22ea1619 (6.4)

    Description

      Suppose an object is created in C++ and its ownership is set to CppOwnership explicitly by QJSEngine::setObjectOwnership(). 

      Once it is referenced by a list element and its invocable method is called by QML engine, then its ownership turns to JavaScriptOwnership.

      I made an autotest that reproduces the issue.

      https://codereview.qt-project.org/c/qt/qtdeclarative/+/368105

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-34433 Instantiator in QtQuick Controls gives error when onObjectRemoved is called.

          • P3: Somewhat important - Should be fixed, but doesn't affect the release in any way.
          • Open

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-95895 REG 5.15 -> 6.2: destroy() does not destroy objects after appending listModel.

          • 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
          For Gerrit Dashboard: QTBUG-96167
          # Subject Branch Project Status CR V
          368105,4 QQmlListModel: Fix C++ owned object getting destroyed dev qt/qtdeclarative Status: MERGED +2 0
          368392,2 QQmlListModel: Fix C++ owned object getting destroyed 6.2 qt/qtdeclarative Status: MERGED +2 0
          456771,4 ListModel: Use PersistentValue to keep track of objects dev qt/qtdeclarative Status: MERGED +2 0
          457053,2 ListModel: Use PersistentValue to keep track of objects 6.5 qt/qtdeclarative Status: MERGED +2 0
          457054,3 ListModel: Use PersistentValue to keep track of objects 6.4 qt/qtdeclarative Status: MERGED +2 0
          457121,3 ListModel: Use PersistentValue to keep track of objects tqtc/lts-6.2 qt/tqtc-qtdeclarative Status: MERGED +2 0

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              qtqmlteam Qt Qml Team User
              jaeyoon.jung Jaeyoon Jung
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                Updated:
                Resolved: