Bug 187444 [Automation][Regression] chart using inherited dataset did not work properly
steps to reproduce: - use the attached report design - preview in html, pdf and viewer expected behavior: - attached report should be previewed properly actual behavior: - return empty report
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/internal/document/v4/ExtendedItemExecutor.java
public IContent execute( )
	{
		if ( !executed )
		{
			executed = true;
			try
			{
				if ( offset != -1 )
				{
					/*
					 * increase the unique id
					 */
					generateUniqueID( );
					content = reader.loadContent( offset );
					content.setGenerateBy( design );
					
					IContent pContent = getParentContent( );
					if ( pContent != null )
					{
						content.setParent( pContent );
					}
					doExecute( );
				}
			}
			catch ( Exception ex )
			{
				ex.printStackTrace( );
			}
		}
		return content;