Bug 163018 An error extension will lead the report contain chart can't be opened and can not new a report.
Details: An error extension will lead the report contain chart can't open In org.eclipse.birt.report.tests.model has an error extension. When run the birt use workbenck, the report contain chart can't be opened and it can not new a report.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/metadata/ElementDefn.java
* element. In practice, any element type that has a style treats style
 * properties as though they were actual properties of the element type itself.
 * <p>
 * The meta-data file defines the style element, and this definition includes a
 * set of properties. Most of these represent properties that are to be applied
 * to elements that have that style (color, font, highlighting, etc.) A very few
 * apply to the style element itself (name, extends). To represent this, the
 * "shared" style properties are marked with an "isStyleProperty" attribute.
 * Anything so marked will associate with elements that have a style.
 * <p>
 * Other elements indicate if they have a style. In general, only the most base
 * element in a hierarchy sub-tree has this indication. All elements derived
 * from such an element also implicitly have a style. That is, a derived element
 * cannot "turn off" the style if one of its ancestors has a style. Let's use
 * the term <em>styled element</em> for one that has a style.
 * <p>
 * A styled element will present the style properties as though they were
 * properties of that element itself. This is done during the meta-data setup
 * process by copying each of the style properties from the style into the
 * styled element. The copy is done only for the most-base element in an element
 * type subtree that has a style. (Elements further down the tree automatically
 * inherit these properties in the normal way.) In practice, the implementation
 * copies a reference to the property, rather than the property itself.
 * <p>
 * However, styles have a wide range of properties, not all of which are
 * relevant to each element. Indeed, there are few elements that use all the
 * style properties. It would be confusing to the user to see a set of
 * irrelevant properties. Therefore, the meta-data file identifies the style
 * properties that are relevant to any given styled component. Only these are
 * copied from the style into the element type.