Defining and calling a function named "update()" in QML crashes the app

import QtQuick 2.1

Column {
anchors.fill: parent

Rectangle {
color: "#ffeeee"
height: parent.height / 2
anchors.left: parent.left
anchors.right: parent.right

Text

{ anchors.centerIn: parent font.pixelSize: 16 text: "update()" }

MouseArea {
anchors.fill: parent
onClicked:

{ update(); parent.color = "#99ff99"; }

}
}

Rectangle {
color: "#eeffee"
height: parent.height / 2
anchors.left: parent.left
anchors.right: parent.right

Text

{ anchors.centerIn: parent font.pixelSize: 16 text: "updateBla()" }

MouseArea {
anchors.fill: parent
onClicked:

{ updateBla(); parent.color = "#99ff99"; }

}
}

function updateBla()

{ console.log("WORKS!"); }

function update()

{ console.log("KABOOM!"); }

}