Bug 140620 Chart scripting errors are ignored
Write a chart with an invalid script, the execution simply ignores the script. This makes it difficult to debug scripting. The error message is also not precise and needs improvements.
chart/org.eclipse.birt.chart.engine/src/org/eclipse/birt/chart/event/WrappedInstruction.java
* (non-Javadoc)
	 * 
	 * @see java.lang.Object#toString()
	 */
	public String toString( )
	{
		return Messages.getString( "wrapped.instruction.to.string",  
				new Object[]{
						super.toString( ),
						new Boolean( isModel( ) ),
						getBounds( )
				}, ULocale.getDefault( ) );
	}
	public final Bounds getBounds( )
	{
		if ( !isModel( ) )
		{
			try
			{
				return pre.getBounds( );
			}
			catch ( Exception ex )
			{
				ex.printStackTrace( );
			}
		}
		else
		{
			Bounds bo = null;
			for ( int i = 0; i < alEvents.size( ); i++ )