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http://nagoya.apache.org/bugzilla/show_bug.cgi?id=15863

An NPE occurs in Jasper2's parser when the body of jsp:attribute is empty.

           Summary: An NPE occurs in Jasper2's parser when the body of
                    jsp:attribute is empty.
           Product: Tomcat 5
           Version: Nightly Build
          Platform: All
        OS/Version: All
            Status: NEW
          Severity: Major
          Priority: Other
         Component: Jasper2
        AssignedTo: [EMAIL PROTECTED]
        ReportedBy: [EMAIL PROTECTED]


According to the JSP 2.0 specicifcation, if the body of the jsp:attribute action
is empty, it is the equivalent of specifying "" as the value of the attribute.

When Jasper2 is provided such a scenario, an NPE occurs.

Stacktrace below:

<stacktrace>
java.lang.NullPointerException
        at
org.apache.jasper.compiler.Validator$ValidateVisitor.visit(Validator.java:825)
        at org.apache.jasper.compiler.Node$CustomTag.accept(Node.java:1022)
        at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:1634)
        at org.apache.jasper.compiler.Node$Visitor.visitBody(Node.java:1676)
        at org.apache.jasper.compiler.Node$Visitor.visit(Node.java:1682)
        at org.apache.jasper.compiler.Node$Root.accept(Node.java:323)
        at org.apache.jasper.compiler.Node$Nodes.visit(Node.java:1634)
        at org.apache.jasper.compiler.Validator.validate(Validator.java:1167)
        at org.apache.jasper.compiler.Compiler.generateJava(Compiler.java:260)
        at org.apache.jasper.compiler.Compiler.compile(Compiler.java:427)
        at
org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:571)
</stacktrace>

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