java.lang.NullPointerException: null
at org.multibit.hd.core.utils.DocumentMaxLengthFilter.replace(DocumentMaxLengthFilter.java:36) ~[multibit-hd.jar:na]
at javax.swing.text.AbstractDocument.replace(AbstractDocument.java:662) ~[na:1.7.0_80]
at javax.swing.text.JTextComponent.replaceSelection(JTextComponent.java:1379) ~[na:1.7.0_80]
at javax.swing.text.JTextComponent.replaceInputMethodText(JTextComponent.java:4767) ~[na:1.7.0_80]
at javax.swing.text.JTextComponent.processInputMethodEvent(JTextComponent.java:4506) ~[na:1.7.0_80]
at java.awt.Component.processEvent(Component.java:6298) ~[na:1.7.0_80]
at java.awt.Container.processEvent(Container.java:2229) ~[na:1.7.0_80]
at java.awt.Component.dispatchEventImpl(Component.java:4872) ~[na:1.7.0_80]
at java.awt.Container.dispatchEventImpl(Container.java:2287) ~[na:1.7.0_80]
at java.awt.Component.dispatchEvent(Component.java:4698) ~[na:1.7.0_80]
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:747) ~[na:1.7.0_80]
at java.awt.EventQueue.access$300(EventQueue.java:103) ~[na:1.7.0_80]
This should be reported better to the user