zscript causes MethodNotFoundException when calling a static method in EL

Steps to Reproduce

1. run the zul below

<?import java.lang.Math ?>
<zk>
	<zscript><![CDATA[
	//if zscript contains any code including a comment, this page produces a MethodNotFoundException
	//if you comment out (or remove) the whole zscript, then no exception is thrown.
	]]></zscript>
	<div apply="org.zkoss.bind.BindComposer">
		<label value="@init((Math.sqrt(16)))"/>
	</div>
</zk>

Current Result

org.zkoss.zel.MethodNotFoundException: Unable to find method [sqrt] with [1] parameters
at org.zkoss.zel.BeanELResolver.invoke(BeanELResolver.java:231)
at org.zkoss.zel.CompositeELResolver.invoke(CompositeELResolver.java:84)
at org.zkoss.zel.CompositeELResolver.invoke(CompositeELResolver.java:84)
at org.zkoss.xel.zel.XelELResolver.invoke(XelELResolver.java:189)
at org.zkoss.bind.xel.zel.BindELResolver.invoke(BindELResolver.java:161)
at org.zkoss.zel.impl.parser.AstValue.getValue(AstValue.java:176)
at org.zkoss.zel.impl.ValueExpressionImpl.getValue(ValueExpressionImpl.java:184)
at org.zkoss.zkmax.bind.impl.ValueExpressionImplEx.getValue(ValueExpressionImplEx.java:52)
at org.zkoss.xel.zel.ELXelExpression.evaluate(ELXelExpression.java:41)
at org.zkoss.zkmax.bind.impl.BindEvaluatorXImplEx$LazyBindXelExpression.evaluate(BindEvaluatorXImplEx.java:124)
at org.zkoss.bind.impl.BindEvaluatorXImpl.getValue(BindEvaluatorXImpl.java:46)
at org.zkoss.bind.impl.InitPropertyBindingImpl.load(InitPropertyBindingImpl.java:58)
at org.zkoss.bind.impl.PropertyBindingHandler.doLoadBinding(PropertyBindingHandler.java:140)
at org.zkoss.bind.impl.PropertyBindingHandler.doInit(PropertyBindingHandler.java:350)
at org.zkoss.bind.impl.BinderImpl.loadComponentProperties0(BinderImpl.java:2466)
at org.zkoss.bind.impl.BinderImpl.loadComponent0(BinderImpl.java:2435)
at org.zkoss.bind.impl.BinderImpl.loadComponent0(BinderImpl.java:2440)
at org.zkoss.bind.impl.BinderImpl.loadComponent(BinderImpl.java:2370)
at org.zkoss.bind.BindComposer$BinderKeeper$Loader.load(BindComposer.java:548)
at org.zkoss.bind.BindComposer$BinderKeeper.loadComponentForAllBinders(BindComposer.java:524)
at org.zkoss.bind.BindComposer.doAfterCompose(BindComposer.java:191)

Expected Result

no exception.

Debug Info

• if you comment out (or remove) the whole zscript, then no exception is thrown.

Workaround

• remove zscript