Having "from" in RotationAnimation inside Transition yields "error: Can't convert real value to var"

Item {
    states: [
        // ...
    ]

    transition: Transition {
        RotationAnimation { properties: "angle"; from: 100; duration: 2000 }
    }
} 

import QtQuick 2.0
Rectangle {
    id: root
    width: 1000
    height: 1000
    states: State {
        name: "rotated"
        PropertyChanges {target: rotation; angle: 180}
    }
    transitions: Transition {
        RotationAnimation {
            duration: 1000
            from: 0 // this seems to be the cause of the error
            direction: RotationAnimation.Counterclockwise
        }
    }
    Text {
        id: text
        anchors.centerIn: parent
        text: "rotated"
        transform: Rotation {
            id: rotation
            angle: 0
            origin.x: text.width/2
            origin.y: text.height/2
        }
    MouseArea {
        anchors.fill: parent
        onClicked: {
            root.state = "rotated"        
        }
    }
}
 

C:/Users/81808/work/Study/Qt/QC_Sandbox/column/column.qml:14:19: error: Can't convert real value to var
            from: 0