Program: 75859
Project: 75859
Buggy source:
public void fillArea(AreaRenderEvent are) throws ChartException {
  final Fill flBackground=validateMultipleFill(are.getBackground());
  if (isFullTransparent(flBackground)) {
    return;
  }
  final GeneralPath gp=new GeneralPath();
  PrimitiveRenderEvent pre;
  for (int i=0; i < are.getElementCount(); i++) {
    pre=are.getElement(i);
    if (pre instanceof ArcRenderEvent) {
      final ArcRenderEvent acre=(ArcRenderEvent)pre;
      final Arc2D.Double a2d=new Arc2D.Double(acre.getTopLeft().getX(),acre.getTopLeft().getY(),acre.getWidth(),acre.getHeight(),acre.getStartAngle(),acre.getAngleExtent(),toSwingArcType(acre.getStyle()));
      gp.append(a2d,true);
    }
 else     if (pre instanceof LineRenderEvent) {
      final LineRenderEvent lre=(LineRenderEvent)pre;
      final Line2D.Double l2d=new Line2D.Double(lre.getStart().getX(),lre.getStart().getY(),lre.getEnd().getX(),lre.getEnd().getY());
      gp.append(l2d,true);
    }
  }
  if (flBackground instanceof ColorDefinition) {
    _g2d.setColor((Color)_ids.getColor((ColorDefinition)flBackground));
  }
 else   if (flBackground instanceof Gradient) {
    final Gradient g=(Gradient)flBackground;
    final ColorDefinition cdStart=g.getStartColor();
    final ColorDefinition cdEnd=g.getEndColor();
    double dAngleInDegrees=g.getDirection();
    final double dAngleInRadians=((-dAngleInDegrees * Math.PI) / 180.0);
    Bounds bo=are.getBounds();
    if (dAngleInDegrees < -90 || dAngleInDegrees > 90) {
      throw new ChartException(ChartDeviceExtensionPlugin.ID,ChartException.RENDERING,"String_Node_Str",new Object[]{new Double(dAngleInDegrees)},Messages.getResourceBundle(getULocale()));
    }
    Point2D.Double p2dStart, p2dEnd;
    if (dAngleInDegrees == 90) {
      p2dStart=new Point2D.Double(bo.getLeft(),bo.getTop() + bo.getHeight());
      p2dEnd=new Point2D.Double(bo.getLeft(),bo.getTop());
    }
 else     if (dAngleInDegrees == -90) {
      p2dEnd=new Point2D.Double(bo.getLeft(),bo.getTop() + bo.getHeight());
      p2dStart=new Point2D.Double(bo.getLeft(),bo.getTop());
    }
 else     if (dAngleInDegrees > 0) {
      p2dStart=new Point2D.Double(bo.getLeft(),bo.getTop() + bo.getHeight());
      p2dEnd=new Point2D.Double(bo.getLeft() + bo.getWidth(),bo.getTop() + bo.getHeight() - bo.getWidth() * Math.abs(Math.tan(dAngleInRadians)));
    }
 else     if (dAngleInDegrees < 0) {
      p2dStart=new Point2D.Double(bo.getLeft(),bo.getTop());
      p2dEnd=new Point2D.Double(bo.getLeft() + bo.getWidth(),bo.getTop() + bo.getWidth() * Math.abs(Math.tan(dAngleInRadians)));
    }
 else {
      p2dStart=new Point2D.Double(bo.getLeft(),bo.getTop());
      p2dEnd=new Point2D.Double(bo.getLeft() + bo.getWidth(),bo.getTop());
    }
    _g2d.setPaint(new GradientPaint(p2dStart,(Color)_ids.getColor(cdStart),p2dEnd,(Color)_ids.getColor(cdEnd)));
  }
 else   if (flBackground instanceof org.eclipse.birt.chart.model.attribute.Image) {
  }
  _g2d.fill(gp);
}

Fixed version (ground truth):
public void fillArea(AreaRenderEvent are) throws ChartException {
  iv.modifyEvent(are);
  final Fill flBackground=validateMultipleFill(are.getBackground());
  if (isFullTransparent(flBackground)) {
    return;
  }
  final GeneralPath gp=new GeneralPath();
  PrimitiveRenderEvent pre;
  for (int i=0; i < are.getElementCount(); i++) {
    pre=are.getElement(i);
    if (pre instanceof ArcRenderEvent) {
      final ArcRenderEvent acre=(ArcRenderEvent)pre;
      final Arc2D.Double a2d=new Arc2D.Double(acre.getTopLeft().getX(),acre.getTopLeft().getY(),acre.getWidth(),acre.getHeight(),acre.getStartAngle(),acre.getAngleExtent(),toSwingArcType(acre.getStyle()));
      gp.append(a2d,true);
    }
 else     if (pre instanceof LineRenderEvent) {
      final LineRenderEvent lre=(LineRenderEvent)pre;
      final Line2D.Double l2d=new Line2D.Double(lre.getStart().getX(),lre.getStart().getY(),lre.getEnd().getX(),lre.getEnd().getY());
      gp.append(l2d,true);
    }
  }
  if (flBackground instanceof ColorDefinition) {
    _g2d.setColor((Color)_ids.getColor((ColorDefinition)flBackground));
  }
 else   if (flBackground instanceof Gradient) {
    final Gradient g=(Gradient)flBackground;
    final ColorDefinition cdStart=g.getStartColor();
    final ColorDefinition cdEnd=g.getEndColor();
    double dAngleInDegrees=g.getDirection();
    final double dAngleInRadians=((-dAngleInDegrees * Math.PI) / 180.0);
    Bounds bo=are.getBounds();
    if (dAngleInDegrees < -90 || dAngleInDegrees > 90) {
      throw new ChartException(ChartDeviceExtensionPlugin.ID,ChartException.RENDERING,"String_Node_Str",new Object[]{new Double(dAngleInDegrees)},Messages.getResourceBundle(getULocale()));
    }
    Point2D.Double p2dStart, p2dEnd;
    if (dAngleInDegrees == 90) {
      p2dStart=new Point2D.Double(bo.getLeft(),bo.getTop() + bo.getHeight());
      p2dEnd=new Point2D.Double(bo.getLeft(),bo.getTop());
    }
 else     if (dAngleInDegrees == -90) {
      p2dEnd=new Point2D.Double(bo.getLeft(),bo.getTop() + bo.getHeight());
      p2dStart=new Point2D.Double(bo.getLeft(),bo.getTop());
    }
 else     if (dAngleInDegrees > 0) {
      p2dStart=new Point2D.Double(bo.getLeft(),bo.getTop() + bo.getHeight());
      p2dEnd=new Point2D.Double(bo.getLeft() + bo.getWidth(),bo.getTop() + bo.getHeight() - bo.getWidth() * Math.abs(Math.tan(dAngleInRadians)));
    }
 else     if (dAngleInDegrees < 0) {
      p2dStart=new Point2D.Double(bo.getLeft(),bo.getTop());
      p2dEnd=new Point2D.Double(bo.getLeft() + bo.getWidth(),bo.getTop() + bo.getWidth() * Math.abs(Math.tan(dAngleInRadians)));
    }
 else {
      p2dStart=new Point2D.Double(bo.getLeft(),bo.getTop());
      p2dEnd=new Point2D.Double(bo.getLeft() + bo.getWidth(),bo.getTop());
    }
    _g2d.setPaint(new GradientPaint(p2dStart,(Color)_ids.getColor(cdStart),p2dEnd,(Color)_ids.getColor(cdEnd)));
  }
 else   if (flBackground instanceof org.eclipse.birt.chart.model.attribute.Image) {
  }
  _g2d.fill(gp);
}