Program: 190397
Project: 190397
Buggy source:
public ToolEventListener[] getListeners(){
  listeners=new ToolEventListener[1];
  listeners[0]=new NodeClickEventListener(){
    public void clickNodes(    Node[] nodes){
      try {
        Node n=nodes[0];
        Color[] colors;
        float[] positions;
        if (heatMapPanel.isUsePalette()) {
          colors=heatMapPanel.getSelectedPalette().getColors();
          positions=heatMapPanel.getSelectedPalette().getPositions();
          dontPaintUnreachable=true;
        }
 else {
          gradientColors=colors=heatMapPanel.getGradientColors();
          gradientPositions=positions=heatMapPanel.getGradientPositions();
          dontPaintUnreachable=heatMapPanel.isDontPaintUnreachable();
        }
        GraphController gc=Lookup.getDefault().lookup(GraphController.class);
        DirectedGraph graph=null;
        if (gc.getModel().getGraph() instanceof DirectedGraph) {
          graph=(DirectedGraph)gc.getModel().getGraph();
        }
 else {
          return;
        }
        LinearGradient linearGradient=new LinearGradient(colors,positions);
        BellmanFordShortestPathAlgorithm algorithm=new BellmanFordShortestPathAlgorithm(graph,n);
        algorithm.compute();
        double maxDistance=algorithm.getMaxDistance();
        if (!dontPaintUnreachable) {
          maxDistance++;
        }
        if (maxDistance > 0) {
          for (          Entry<Node,Double> entry : algorithm.getDistances().entrySet()) {
            NodeData node=entry.getKey().getNodeData();
            if (!Double.isInfinite(entry.getValue())) {
              float ratio=(float)(entry.getValue() / maxDistance);
              Color c=linearGradient.getValue(ratio);
              node.setColor(c.getRed() / 255f,c.getGreen() / 255f,c.getBlue() / 255f);
            }
 else             if (!dontPaintUnreachable) {
              Color c=colors[colors.length - 1];
              node.setColor(c.getRed() / 255f,c.getGreen() / 255f,c.getBlue() / 255f);
            }
          }
        }
        Color c=colors[0];
        n.getNodeData().setColor(c.getRed() / 255f,c.getGreen() / 255f,c.getBlue() / 255f);
        heatMapPanel.setStatus(NbBundle.getMessage(HeatMap.class,"String_Node_Str") + new DecimalFormat("String_Node_Str").format(algorithm.getMaxDistance()));
      }
 catch (      Exception e) {
        e.printStackTrace();
      }
    }
  }
;
  return listeners;
}

Fixed version (ground truth):
public ToolEventListener[] getListeners(){
  listeners=new ToolEventListener[1];
  listeners[0]=new NodeClickEventListener(){
    public void clickNodes(    Node[] nodes){
      try {
        Node n=nodes[0];
        Color[] colors;
        float[] positions;
        if (heatMapPanel.isUsePalette()) {
          colors=heatMapPanel.getSelectedPalette().getColors();
          positions=heatMapPanel.getSelectedPalette().getPositions();
          dontPaintUnreachable=true;
        }
 else {
          gradientColors=colors=heatMapPanel.getGradientColors();
          gradientPositions=positions=heatMapPanel.getGradientPositions();
          dontPaintUnreachable=heatMapPanel.isDontPaintUnreachable();
        }
        GraphController gc=Lookup.getDefault().lookup(GraphController.class);
        DirectedGraph graph=null;
        if (gc.getModel().getGraphVisible() instanceof DirectedGraph) {
          graph=(DirectedGraph)gc.getModel().getGraphVisible();
        }
 else {
          return;
        }
        LinearGradient linearGradient=new LinearGradient(colors,positions);
        BellmanFordShortestPathAlgorithm algorithm=new BellmanFordShortestPathAlgorithm(graph,n);
        algorithm.compute();
        double maxDistance=algorithm.getMaxDistance();
        if (!dontPaintUnreachable) {
          maxDistance++;
        }
        if (maxDistance > 0) {
          for (          Entry<Node,Double> entry : algorithm.getDistances().entrySet()) {
            NodeData node=entry.getKey().getNodeData();
            if (!Double.isInfinite(entry.getValue())) {
              float ratio=(float)(entry.getValue() / maxDistance);
              Color c=linearGradient.getValue(ratio);
              node.setColor(c.getRed() / 255f,c.getGreen() / 255f,c.getBlue() / 255f);
            }
 else             if (!dontPaintUnreachable) {
              Color c=colors[colors.length - 1];
              node.setColor(c.getRed() / 255f,c.getGreen() / 255f,c.getBlue() / 255f);
            }
          }
        }
        Color c=colors[0];
        n.getNodeData().setColor(c.getRed() / 255f,c.getGreen() / 255f,c.getBlue() / 255f);
        heatMapPanel.setStatus(NbBundle.getMessage(HeatMap.class,"String_Node_Str") + new DecimalFormat("String_Node_Str").format(algorithm.getMaxDistance()));
      }
 catch (      Exception e) {
        e.printStackTrace();
      }
    }
  }
;
  return listeners;
}