CLI NullPointerException for Ctrl+D when prompted for username.

[standalone@localhost:9990 /] [darranl@localhost bin]$ ./jboss-cli.sh 
You are disconnected at the moment. Type 'connect' to connect to the server or 'help' for the list of supported commands.
[disconnected /] connect
Username: java.lang.NullPointerException
	at org.jboss.aesh.console.Console.pushToStdOut(Console.java:227)
	at org.jboss.as.cli.impl.Console$Factory$1.print(Console.java:160)
	at org.jboss.as.cli.impl.CommandContextImpl.printLine(CommandContextImpl.java:704)
	at org.jboss.as.cli.impl.CommandContextImpl.error(CommandContextImpl.java:722)
	at org.jboss.as.cli.impl.CommandContextImpl.handleSafe(CommandContextImpl.java:647)
	at org.jboss.as.cli.impl.CommandContextImpl.interact(CommandContextImpl.java:1272)
	at org.jboss.as.cli.impl.CliLauncher.main(CliLauncher.java:254)
	at org.jboss.as.cli.CommandLineMain.main(CommandLineMain.java:34)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:606)
	at org.jboss.modules.Module.run(Module.java:312)
	at org.jboss.modules.Main.main(Main.java:460)