Hi, If JSP includes a line "<c:if test="${nonExisting}">Hello,world!</c:if>" where "nonExisting" is attribute that does not exist, then NullPointerException will be thrown. The cause is at http://svn.apache.org/repos/asf/tomcat/trunk/java/org/apache/jasper/compiler/JspUtil.java at line #421 which generates something like: ((java.lang.Boolean) org.apache.jasper.runtime.PageContextImpl.proprietaryEvaluate("${nonExisting}", java.lang.Boolean.class, (javax.servlet.jsp.PageContext)_jspx_page_context, null, false)).booleanValue()
The result of proprietaryEvaluate() is null (because of EL 3.0 changes regarding coercing), hence calling booleanValue() will throw NPE. The latest changes in EL specification does require guarding against such null pointer access (otherwise it will break lots of existing applications). I really hope that this is not intended behavior. Double checked the existence of error with Tomcat v8.0.0-RC1 (the same problem affects the Glassfish v4, but they have a forked version of JSPC -- Arvīds