Function isConstantAttribute in TagPluginManager seems to be be broken.
For value "order.status" it returns false. And for value "${order.state.name}" it returns true. According to javadoc it should be exact opposite.

Problem seems to be in Node.isLiteral function. "el!= null" should probably be "el== null" But this function is being used elsewhere.


/**
* @return true if the attribute is specified and its value is a
*         translation-time constant.
*/
public boolean TagPluginManager.isConstantAttribute(String attribute){
    Node.JspAttribute attr = getNodeAttribute(attribute);
    if (attr == null)
        return false;
    return attr.isLiteral();
}
/**
* @return true if the value is a string literal known at translation
*         time.
*/
public boolean isLiteral() {
    return !expression && (el != null) && !namedAttribute;
}