Context reloading fails when using jetty-env.xml

Within the attached project:

1) mvn jetty6:run
2) touch target/classes/Test.class

Jetty produces the following exception:

[ERROR] Error reconfiguring/restarting webapp after change in watched files
javax.naming.NameAlreadyBoundException: test
at org.mortbay.naming.NamingContext.createSubcontext(NamingContext.java:442)
at org.mortbay.naming.NamingContext.createSubcontext(NamingContext.java:506)
at org.mortbay.naming.local.localContext.createSubcontext(localContext.java:292)
at javax.naming.InitialContext.createSubcontext(InitialContext.java:423)
at org.mortbay.jetty.plus.webapp.EnvConfiguration.configureWebApp(EnvConfiguration.java:106)
at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:953)
at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:341)
at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:367)
at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:37)
at org.mortbay.jetty.plugin.Jetty6PluginWebApplication.start(Jetty6PluginWebApplication.java:104)
at org.mortbay.jetty.plugin.AbstractJettyRunMojo$1.changesDetected(AbstractJettyRunMojo.java:260)
at org.mortbay.jetty.plugin.util.Scanner.run(Scanner.java:160)