application crashes if subtitle.text of Captions is too long

[XiaoGuo, Liu]

I copied the code snippet at https://developer.ubuntu.com/api/apps/qml/sdk-15.04.1/Ubuntu.Components.Captions/, and I made an example at https://github.com/liu-xiao-guo/captions

If the code is like:

                Captions {
                    title.text: "Caption1"
                    subtitle.text: "Subtitle text 1111111111111111111"
                    // attached properties of an Item type property
                    // can be changed only with assignment
                    Component.onCompleted: subtitle.Layout.alignment = Qt.AlignRight
                }

The app crashes, however, if I change the above code to:

                Captions {
                    title.text: "Caption1"
                    subtitle.text: "Subtitle text"
                    // attached properties of an Item type property
                    // can be changed only with assignment
                    Component.onCompleted: subtitle.Layout.alignment = Qt.AlignRight
                }

Then the app does not crash any more.

Best regards,
XiaoGuo