[QTBUG-90538] "required" existing property not reflects model data if CONFIG+=qtquickcompiler enabled - Qt Bug Tracker

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Details

Type: Bug
Status: Closed
Priority: P2: Important
Resolution: Done
Affects Version/s: 5.15.2
Fix Version/s: 5.15.3, 6.1.0 Alpha, 6.1
Component/s: QML: Compiler
Labels:
- earmarked_by_ulf

Platform/s:

Linux/X11
Commits:
b322a971f06823a4356f2b3aa331501aa4d0dc7f (qt/qtdeclarative/dev) 7f99a69e25ee3ae99c3b4ba713b8c6b5e8e60135 (qt/qtdeclarative/6.0) 045718e821d1d1f1d5732f123c7a9c189bd92b19 (qt/tqtc-qtdeclarative/tqtc/lts-5.15)

Description

The following example binds model's "visible" role to Item.visible property,
one by "required visible" and the other by "visible: model.visible".

Both texts should blink reflecting model.visible. However, the "required visible"
one does not blink if compiled with CONFIG+=qtquickcompiler.

Window {
    width: 640
    height: 480
    visible: true

    ListModel {
        id: fakeModel

        ListElement {
            visible: false
            tick: 0
        }
    }

    Column {
        spacing: 2

        Repeater {
            model: fakeModel

            Text {
                required visible
                required property int tick
                required property var model
                text: "hello required, tick: " + tick + ", model.visible: " + model.visible
            }
        }

        Repeater {
            model: fakeModel

            Text {
                visible: model.visible
                text: "hello old style, tick: " + model.tick
            }
        }
    }

    Timer {
        property int tick: 0
        interval: 1000
        repeat: true
        running: true
        onTriggered: {
            ++tick;
            fakeModel.set(0, {visible: !!(tick % 2), tick: tick});
        }
    }
}