Bulk edit plan permission fail when username contain @

2015-09-15 21:08:10,693 ERROR [http-bio-8085-exec-3] [FiveOhOh] 500 Exception was thrown.
java.lang.IllegalArgumentException: In expression [@ww.hidden name='${grantedPermission}' value='true' /] ['${grantedPermission}'] evaluated as [bambooPermission_user_asd@_ADMINISTRATION] was deemed unsafe
	at freemarker.core.UnifiedCall.accept(UnifiedCall.java:150)
	at freemarker.core.Environment.visit(Environment.java:210)
	at freemarker.core.IteratorBlock$Context.runLoop(IteratorBlock.java:167)
	at freemarker.core.Environment.visit(Environment.java:417)
	at freemarker.core.IteratorBlock.accept(IteratorBlock.java:102)
	at freemarker.core.Environment.visit(Environment.java:210)
	at freemarker.core.ConditionalBlock.accept(ConditionalBlock.java:79)
	at freemarker.core.Environment.visit(Environment.java:210)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:210)
	at freemarker.core.Environment.visit(Environment.java:299)
	at freemarker.core.UnifiedCall.accept(UnifiedCall.java:165)
	at freemarker.core.Environment.visit(Environment.java:210)
	at freemarker.core.MixedContent.accept(MixedContent.java:92)
	at freemarker.core.Environment.visit(Environment.java:210)
	at freemarker.core.Environment.process(Environment.java:190)
	at freemarker.template.Template.process(Template.java:289)
	at freemarker.template.Template.process(Template.java:243)
	at org.apache.struts2.views.freemarker.FreemarkerResult.doExecute(FreemarkerResult.java:215)
	at org.apache.struts2.dispatcher.StrutsResultSupport.execute(StrutsResultSupport.java:186)
	at com.opensymphony.xwork2.DefaultActionInvocation.executeResult(DefaultActionInvocation.java:371)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:275)
	at com.opensymphony.xwork2.interceptor.DefaultWorkflowInterceptor.doIntercept(DefaultWorkflowInterceptor.java:168)
	at com.atlassian.bamboo.ww2.interceptors.BambooWorkflowInterceptor.validateWorkflow(BambooWorkflowInterceptor.java:54)
	at com.atlassian.bamboo.ww2.interceptors.BambooWorkflowInterceptor.access$000(BambooWorkflowInterceptor.java:16)
	at com.atlassian.bamboo.ww2.interceptors.BambooWorkflowInterceptor$1.call(BambooWorkflowInterceptor.java:33)
	at com.atlassian.bamboo.ww2.interceptors.BambooWorkflowInterceptor$1.call(BambooWorkflowInterceptor.java:29)
	at com.atlassian.bamboo.util.BambooProfilingUtils.withUtilTimerStack(BambooProfilingUtils.java:51)
	at com.atlassian.bamboo.ww2.interceptors.BambooWorkflowInterceptor.doIntercept(BambooWorkflowInterceptor.java:28)
	at com.opensymphony.xwork2.interceptor.MethodFilterInterceptor.intercept(MethodFilterInterceptor.java:98)
	at com.opensymphony.xwork2.DefaultActionInvocation.invoke(DefaultActionInvocation.java:246)