CLI throws an exception when doing tab completition of operation headers.

Steps to reproduce:
1) Open CLI, connect to domain
2) type: deploy --all-server-groups /home/dpospisi/deploy/deployment0.war --headers={rollout=
3) hit tab

Exception thrown:

org.jboss.as.cli.CommandFormatException: Property is missing name at index 8
at org.jboss.as.cli.parsing.operation.header.RolloutPlanHeaderCallbackHandler.enteredState(RolloutPlanHeaderCallbackHandler.java:71)
at org.jboss.as.cli.parsing.ParserUtil$1.enteredState(ParserUtil.java:108)
at org.jboss.as.cli.parsing.StateParser$ParsingContextImpl.enterState(StateParser.java:103)
at org.jboss.as.cli.parsing.operation.HeaderState$1.handle(HeaderState.java:62)
at org.jboss.as.cli.parsing.StateParser$ParsingContextImpl.leaveState(StateParser.java:113)
at org.jboss.as.cli.parsing.GlobalCharacterHandlers$4.handle(GlobalCharacterHandlers.java:76)
at org.jboss.as.cli.parsing.StateParser.parse(StateParser.java:68)
at org.jboss.as.cli.parsing.ParserUtil.parseOperationRequest(ParserUtil.java:61)
at org.jboss.as.cli.operation.impl.DefaultCallbackHandler.parseOperation(DefaultCallbackHandler.java:128)
at org.jboss.as.cli.operation.impl.HeadersCompleter.complete(HeadersCompleter.java:53)
at org.jboss.as.cli.operation.OperationRequestCompleter.complete(OperationRequestCompleter.java:222)
at org.jboss.as.cli.CommandCompleter.complete(CommandCompleter.java:91)
at org.jboss.as.cli.impl.Console$Factory$1$1.complete(Console.java:121)
at jline.ConsoleReader.complete(ConsoleReader.java:832)
at jline.ConsoleReader.readLine(ConsoleReader.java:518)
at jline.ConsoleReader.readLine(ConsoleReader.java:448)
at org.jboss.as.cli.impl.Console$Factory$1.readLine(Console.java:192)
at org.jboss.as.cli.impl.CommandContextImpl.interact(CommandContextImpl.java:1002)
at org.jboss.as.cli.impl.CliLauncher.main(CliLauncher.java:189)
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:601)
at org.jboss.modules.Module.run(Module.java:260)
at org.jboss.modules.Main.main(Main.java:291)