Can't build app when there is a function in QML Dialog

import QtQuick
import QtQuick.Controls
Component {
    Dialog {
        id: root
        width: window.width * 0.8
        height: window.height * 0.6
        Label {
            text: "hey I'm a dialog"
            anchors.centerIn: parent
        }
        function myOpen() {
            console.log("myOpen called")
            root.open()
        }
    }
}

14:51:35: Running steps for project functionCrash...
14:51:35: Starting: "C:\Qt\Tools\CMake_64\bin\cmake.exe" --build C:/MyDev/qb/qt/qmlDialogFunctionCrash/build-functionCrash-Desktop_Qt_6_5_0_MSVC2019_64bit-Release --target all
[1/9 9.3/sec] Generating functionCrash/Main.qml
[2/9 7.5/sec] Running qmlimportscanner for appfunctionCrash
[3/9 8.6/sec] Running rcc for resource appfunctionCrash_raw_qml_0
[4/9 7.8/sec] Generating .rcc/qmlcache/appfunctionCrash_Main_qml.cpp
[5/9 8.4/sec] Generating .rcc/qmlcache/appfunctionCrash_TestDialog_qml.cpp
FAILED: .rcc/qmlcache/appfunctionCrash_TestDialog_qml.cpp C:/MyDev/qb/qt/qmlDialogFunctionCrash/build-functionCrash-Desktop_Qt_6_5_0_MSVC2019_64bit-Release/.rcc/qmlcache/appfunctionCrash_TestDialog_qml.cpp 
cmd.exe /C "cd /D C:\MyDev\qb\qt\qmlDialogFunctionCrash\build-functionCrash-Desktop_Qt_6_5_0_MSVC2019_64bit-Release && C:\Qt\Tools\CMake_64\bin\cmake.exe -E make_directory C:/MyDev/qb/qt/qmlDialogFunctionCrash/build-functionCrash-Desktop_Qt_6_5_0_MSVC2019_64bit-Release/.rcc/qmlcache && C:\MyDev\qb\qt\qmlDialogFunctionCrash\build-functionCrash-Desktop_Qt_6_5_0_MSVC2019_64bit-Release\.qt\bin\qt_setup_tool_path.bat C:/Qt/6.5.0/msvc2019_64/./bin/qmlcachegen.exe --bare --resource-path /qt/qml/functionCrash/TestDialog.qml -I C:/MyDev/qb/qt/qmlDialogFunctionCrash/build-functionCrash-Desktop_Qt_6_5_0_MSVC2019_64bit-Release -I C:/Qt/6.5.0/msvc2019_64/./qml -i C:/MyDev/qb/qt/qmlDialogFunctionCrash/build-functionCrash-Desktop_Qt_6_5_0_MSVC2019_64bit-Release/functionCrash/qmldir --resource C:/MyDev/qb/qt/qmlDialogFunctionCrash/build-functionCrash-Desktop_Qt_6_5_0_MSVC2019_64bit-Release/.rcc/qmake_functionCrash.qrc --resource C:/MyDev/qb/qt/qmlDialogFunctionCrash/build-functionCrash-Desktop_Qt_6_5_0_MSVC2019_64bit-Release/.rcc/appfunctionCrash_raw_qml_0.qrc -o C:/MyDev/qb/qt/qmlDialogFunctionCrash/build-functionCrash-Desktop_Qt_6_5_0_MSVC2019_64bit-Release/.rcc/qmlcache/appfunctionCrash_TestDialog_qml.cpp C:/MyDev/qb/qt/qmlDialogFunctionCrash/functionCrash/TestDialog.qml"
ninja: build stopped: subcommand failed.
14:51:35: The process "C:\Qt\Tools\CMake_64\bin\cmake.exe" exited with code 1.
Error while building/deploying project functionCrash (kit: Desktop Qt 6.5.0 MSVC2019 64bit)
When executing step "Build"