CommandLineConsole: ls in subsystem=datasources causing java.lang.ArithmeticException: / by zero

Description of problem:

Version-Release number of selected component (if applicable):
eap6.1.0.DR4

Steps to Reproduce:
1.run fresh jboss instance
2.connect to it with jboss-cli
3.cd subsystem=datasources
4.ls

Additional info:
java.lang.ArithmeticException: / by zero
at org.jboss.aesh.util.Parser.formatDisplayList(Parser.java:70)
at org.jboss.aesh.util.Parser.formatDisplayList(Parser.java:43)
at org.jboss.as.cli.impl.Console$Factory$1.printColumns(Console.java:146)
at org.jboss.as.cli.impl.CommandContextImpl.printColumns(CommandContextImpl.java:713)
at org.jboss.as.cli.handlers.CommandHandlerWithHelp.printList(CommandHandlerWithHelp.java:128)
at org.jboss.as.cli.handlers.LsHandler.doHandle(LsHandler.java:355)
at org.jboss.as.cli.handlers.CommandHandlerWithHelp.handle(CommandHandlerWithHelp.java:86)
at org.jboss.as.cli.impl.CommandContextImpl.handle(CommandContextImpl.java:581)
at org.jboss.as.cli.impl.CommandContextImpl.handleSafe(CommandContextImpl.java:597)
at org.jboss.as.cli.impl.CommandContextImpl.interact(CommandContextImpl.java:1185)
at org.jboss.as.cli.impl.CliLauncher.main(CliLauncher.java:259)
at org.jboss.as.cli.CommandLineMain.main(CommandLineMain.java:34)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at org.jboss.modules.Module.run(Module.java:262)
at org.jboss.modules.Main.main(Main.java:329)