When the prompt string is empty (not null) and the text is empty, you get this error during paint:
java.lang.IllegalArgumentException: Zero length iterator passed to TextLayout constructor.
Exception thrown during paint(): java.lang.IllegalArgumentException: Zero length iterator passed to TextLayout constructor.
Exception in thread "AWT-EventQueue-0" java.lang.IllegalArgumentException: Zero length iterator passed to TextLayout constructor.
at java.awt.font.TextLayout.<init>(Unknown Source)
at org.apache.pivot.wtk.skin.terra.TerraTextInputSkin.paint(TerraTextInputSkin.java:535)
at org.apache.pivot.wtk.Component.paint(Component.java:1965)
at org.apache.pivot.wtk.Container.paint0(Container.java:446)
at org.apache.pivot.wtk.Container.paint(Container.java:359)
at org.apache.pivot.wtk.Container.paint0(Container.java:446)
at org.apache.pivot.wtk.Container.paint(Container.java:359)
at org.apache.pivot.wtk.Container.paint0(Container.java:446)
at org.apache.pivot.wtk.Container.paint(Container.java:359)
at org.apache.pivot.wtk.Container.paint0(Container.java:446)
at org.apache.pivot.wtk.Container.paint(Container.java:359)
at org.apache.pivot.wtk.Container.paint0(Container.java:446)
at org.apache.pivot.wtk.Container.paint(Container.java:359)
at org.apache.pivot.wtk.Container.paint0(Container.java:446)
at org.apache.pivot.wtk.Container.paint(Container.java:359)
at org.apache.pivot.wtk.Container.paint0(Container.java:446)
at org.apache.pivot.wtk.Container.paint(Container.java:359)
at org.apache.pivot.wtk.ApplicationContext$DisplayHost.paintDisplay(ApplicationContext.java:798)
at org.apache.pivot.wtk.ApplicationContext$DisplayHost.paintVolatileBuffered(ApplicationContext.java:758)
at org.apache.pivot.wtk.ApplicationContext$DisplayHost.paint(ApplicationContext.java:635)
at java.awt.GraphicsCallback$PaintCallback.run(Unknown Source)