CLI throws IAE on tab completion

[standalone@localhost:9990 /]  /subsystem=jgroups/stack=udp/transport=UDP:write-attribute(name=properties.java.lang.IllegalArgumentException
	at org.jboss.dmr.ModelValue.getKeys(ModelValue.java:136)
	at org.jboss.dmr.ModelNode.keys(ModelNode.java:1373)
	at org.jboss.as.cli.impl.AttributeNamePathCompleter$AttributeNamePathCallbackHandler.getCandidates(AttributeNamePathCompleter.java:165)
	at org.jboss.as.cli.impl.AttributeNamePathCompleter.complete(AttributeNamePathCompleter.java:112)
	at org.jboss.as.cli.impl.AttributeNamePathCompleter.complete(AttributeNamePathCompleter.java:96)
	at org.jboss.as.cli.operation.OperationRequestCompleter.complete(OperationRequestCompleter.java:229)
	at org.jboss.as.cli.operation.OperationRequestCompleter.complete(OperationRequestCompleter.java:73)
	at org.jboss.as.cli.CommandCompleter.doComplete(CommandCompleter.java:126)
	at org.jboss.as.cli.CommandCompleter.complete(CommandCompleter.java:63)
	at org.jboss.as.cli.impl.Console$Factory$1$1.complete(Console.java:122)
	at org.jboss.aesh.console.Console.complete(Console.java:1227)
	at org.jboss.aesh.console.Console.parseOperation(Console.java:551)
	at org.jboss.aesh.console.Console.read(Console.java:453)
	at org.jboss.aesh.console.Console.read(Console.java:347)
	at org.jboss.as.cli.impl.Console$Factory$1.readLine(Console.java:198)
	at org.jboss.as.cli.impl.CommandContextImpl.interact(CommandContextImpl.java:1327)
	at org.jboss.as.cli.impl.CliLauncher.main(CliLauncher.java:272)
	at org.jboss.as.cli.CommandLineMain.main(CommandLineMain.java:45)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.lang.reflect.Method.invoke(Method.java:497)
	at org.jboss.modules.Module.run(Module.java:308)
	at org.jboss.modules.Main.main(Main.java:487)