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  1. Qt
  2. QTBUG-121014

[REG 6.6 → 6.7] Faulty behavior of instanceof when multipe QML engines are used

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    • d0e16e3f6 (dev), ef57b8798 (6.7)

    Description

      See the minimal example in https://invent.kde.org/nicolasfella/qml-test/-/tree/instanceof

      "actions instanceof Comps.Action" should yield true, but is false.

      When commenting out the c2 QML engine in main.cpp it works as expected.

      When commenting out the qmlRegisterType for Action.qml it works as expected.

      It works as expected in Qt 6.6

      qtbase 33b4c2d4af90d255b59ac79175c145f0e3299915

      qtdeclarative 1dcd94caa6ce0b73ddfff1a258d3c5fc557964fe

      This causes https://bugs.kde.org/show_bug.cgi?id=479770 and https://bugs.kde.org/show_bug.cgi?id=479775 because the instanceof check in https://invent.kde.org/frameworks/kirigami/-/blob/master/src/controls/private/PrivateActionToolButton.qml#L27 is yielding false

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          relates to

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-120189 [Reg 6.6 -> 6.7] Cannot assign object of type "IconPropertiesGroup" to property of type "IconPropertiesGroup_QMLTYPE_1*" as the former is neither the same as the latter nor a sub-class of it

          • 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
          resulted from

          Bug - A problem which impairs or prevents the functions of the product. QTBUG-106066 instanceof don't work with inline components

          • P2: Important - Urgent, should be fixed, but will not stop the release.
          • Closed
          For Gerrit Dashboard: QTBUG-121014
          # Subject Branch Project Status CR V
          531285,2 QtQml: Don't create metatypes for procedurally registered composites dev qt/qtdeclarative Status: MERGED +2 0
          531667,2 QtQml: Don't create metatypes for procedurally registered composites 6.7 qt/qtdeclarative Status: MERGED +2 0

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              ulherman Ulf Hermann
              nicolasfella Nicolas Fella
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                Created:
                Updated:
                Resolved:

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