Index: src/main/java/common/javax/swing/Box.java =================================================================== --- src/main/java/common/javax/swing/Box.java (revision 489013) +++ src/main/java/common/javax/swing/Box.java (working copy) @@ -121,6 +121,8 @@ } public static Component createRigidArea(Dimension size) { + size = (size == null ? new Dimension(0, 0) : size); + return new Filler(new Dimension(size), new Dimension(size), new Dimension(size)); }