Program: 75856
Project: 75856
Buggy source:
public void drawArc(ArcRenderEvent are) throws ChartException {
  final LineAttributes lia=are.getOutline();
  if (!validateLineAttributes(are.getSource(),lia)) {
    return;
  }
  final Color cFG=(Color)validateEdgeColor(lia.getColor(),are.getBackground(),_ids);
  if (cFG == null || cFG.getAlpha() == 0) {
    return;
  }
  Stroke sPrevious=null;
  Stroke sCurrent=getCachedStroke(lia);
  if (sCurrent != null) {
    sPrevious=_g2d.getStroke();
    _g2d.setStroke(sCurrent);
  }
  _g2d.setColor(cFG);
  if (are.getInnerRadius() >= 0 && are.getOuterRadius() > 0 && are.getInnerRadius() < are.getOuterRadius()) {
    Shape outerArc=new Arc2D.Double(are.getTopLeft().getX() + (are.getWidth() - 2 * are.getOuterRadius()) / 2,are.getTopLeft().getY() + (are.getHeight() - 2 * are.getOuterRadius()) / 2,2 * are.getOuterRadius(),2 * are.getOuterRadius(),are.getStartAngle(),are.getAngleExtent(),Arc2D.PIE);
    Shape innerArc=new Arc2D.Double(are.getTopLeft().getX() + (are.getWidth() - 2 * are.getInnerRadius()) / 2,are.getTopLeft().getY() + (are.getHeight() - 2 * are.getInnerRadius()) / 2,2 * are.getInnerRadius(),2 * are.getInnerRadius(),are.getStartAngle(),are.getAngleExtent(),Arc2D.PIE);
    Area fArea=new Area(outerArc);
    fArea.exclusiveOr(new Area(innerArc));
    Shape prevClip=_g2d.getClip();
    Area ar2=new Area(fArea);
    if (prevClip != null) {
      Area ar1=new Area(prevClip);
      ar2.intersect(ar1);
    }
    _g2d.setClip(ar2);
    _g2d.draw(fArea);
    _g2d.setClip(prevClip);
  }
 else {
    _g2d.draw(new Arc2D.Double(are.getTopLeft().getX(),are.getTopLeft().getY(),are.getWidth(),are.getHeight(),are.getStartAngle(),are.getAngleExtent(),toSwingArcType(are.getStyle())));
  }
  if (sPrevious != null) {
    _g2d.setStroke(sPrevious);
  }
}

Fixed version (ground truth):
public void drawArc(ArcRenderEvent are) throws ChartException {
  iv.modifyEvent(are);
  final LineAttributes lia=are.getOutline();
  if (!validateLineAttributes(are.getSource(),lia)) {
    return;
  }
  final Color cFG=(Color)validateEdgeColor(lia.getColor(),are.getBackground(),_ids);
  if (cFG == null || cFG.getAlpha() == 0) {
    return;
  }
  Stroke sPrevious=null;
  Stroke sCurrent=getCachedStroke(lia);
  if (sCurrent != null) {
    sPrevious=_g2d.getStroke();
    _g2d.setStroke(sCurrent);
  }
  _g2d.setColor(cFG);
  if (are.getInnerRadius() >= 0 && are.getOuterRadius() > 0 && are.getInnerRadius() < are.getOuterRadius()) {
    Shape outerArc=new Arc2D.Double(are.getTopLeft().getX() + (are.getWidth() - 2 * are.getOuterRadius()) / 2,are.getTopLeft().getY() + (are.getHeight() - 2 * are.getOuterRadius()) / 2,2 * are.getOuterRadius(),2 * are.getOuterRadius(),are.getStartAngle(),are.getAngleExtent(),Arc2D.PIE);
    Shape innerArc=new Arc2D.Double(are.getTopLeft().getX() + (are.getWidth() - 2 * are.getInnerRadius()) / 2,are.getTopLeft().getY() + (are.getHeight() - 2 * are.getInnerRadius()) / 2,2 * are.getInnerRadius(),2 * are.getInnerRadius(),are.getStartAngle(),are.getAngleExtent(),Arc2D.PIE);
    Area fArea=new Area(outerArc);
    fArea.exclusiveOr(new Area(innerArc));
    Shape prevClip=_g2d.getClip();
    Area ar2=new Area(fArea);
    if (prevClip != null) {
      Area ar1=new Area(prevClip);
      ar2.intersect(ar1);
    }
    _g2d.setClip(ar2);
    _g2d.draw(fArea);
    _g2d.setClip(prevClip);
  }
 else {
    _g2d.draw(new Arc2D.Double(are.getTopLeft().getX(),are.getTopLeft().getY(),are.getWidth(),are.getHeight(),are.getStartAngle(),are.getAngleExtent(),toSwingArcType(are.getStyle())));
  }
  if (sPrevious != null) {
    _g2d.setStroke(sPrevious);
  }
}