JSTL XML tag problem: Cannot inherit from final class

I’m trying to use the JSTL XML tags in a JSP page and I’m getting this error:

java.lang.VerifyError: Cannot inherit from final class
java.lang.ClassLoader.defineClass0(Native Method)
java.lang.ClassLoader.defineClass(ClassLoader.java:502)
java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123)
...WebappClassLoader.findClassInternal(WebappClassLoader.java:1634)
...WebappClassLoader.findClass(WebappClassLoader.java:860)
...WebappClassLoader.loadClass(WebappClassLoader.java:1307)
...WebappClassLoader.loadClass(WebappClassLoader.java:1189)
java.lang.ClassLoader.loadClassInternal(ClassLoader.java:315)
org.apache.taglibs.standard.tag.common.xml.ForEachTag.prepare(ForEachTag.java:88)
javax.servlet.jsp.jstl.core.LoopTagSupport.doStartTag(LoopTagSupport.java:262)
org.apache.jsp.test_jsp._jspx_meth_x_forEach_0(test_jsp.java:176)
org.apache.jsp.test_jsp._jspService(test_jsp.java:84)
org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)
org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:298)
org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
javax.servlet.http.HttpServlet.service(HttpServlet.java:810)

when trying to execute this code:

<c:set var="xmlText">
  <a>
   <b>
    <c>
    foo
    </c>
   </b>
   <d>
     bar
   </d>
  </a>
</c:set>
<x:parse var="a" doc="${xmlText}" />
<x:out select="$a//c"/>

which is straight out of the JSTL examples application in the Java Web Services Tutorial v1.3. I’m running the latest version of Tomcat (version 5.0.25) on Windows XP if that matters.

Can anyone help?

Update: 06/03/2004: Thanks Kris! Adding xalan.jar to the {tomcat}/common/endorsed/ path fixed the problem.

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