Program: 57952
Project: 57952
Buggy source:
@Override public void render(final GL2 gl){
  contentSpacing.getYDistances().clear();
  float yPosition=y;
  float xPosition=0;
  float fieldHeight=0;
  float fieldWidth=x;
  int iCount=0;
  for (  Integer contentID : heatMap.getContentVA()) {
    iCount++;
    fieldHeight=contentSpacing.getFieldHeight(contentID);
    if (heatMap.isHideElements() && heatMap.getContentSelectionManager().checkStatus(GLHeatMap.SELECTION_HIDDEN,contentID)) {
      contentSpacing.getYDistances().add(yPosition);
      continue;
    }
    yPosition-=fieldHeight;
    xPosition=0;
    ISet set=heatMap.getSet();
    if (set == null)     return;
    float[] certainty=new float[3];
    certainty[0]=set.getNormalizedUncertainty(contentID);
    certainty[1]=set.getNormalizedUncertainty(contentID);
    certainty[2]=set.getNormalizedUncertainty(contentID);
    PixelGLConverter conv=heatMap.getParentGLCanvas().getPixelGLConverter();
    int screenHeight=conv.getPixelHeightForGLHeight(fieldHeight);
    if (screenHeight < 3) {
      int i=0;
      certainty[i]=certainty[i] > 1 ? 1 : certainty[i];
      certainty[i]=certainty[i] < 0 ? 0 : certainty[i];
      renderLine(gl,yPosition,xPosition,fieldHeight,fieldWidth,certainty[i],GLUncertaintyHeatMap.lightLight);
    }
 else {
      for (int i=0; i < certainty.length; i++) {
        float height=fieldHeight / (float)certainty.length;
        float yPos=yPosition + height * i;
        certainty[i]=certainty[i] > 1 ? 1 : certainty[i];
        certainty[i]=certainty[i] < 0 ? 0 : certainty[i];
        renderLine(gl,yPos,xPosition,height,fieldWidth,certainty[i],GLUncertaintyHeatMap.levelLightColor[i]);
      }
    }
    contentSpacing.getYDistances().add(yPosition);
  }
}

Fixed version (ground truth):
@Override public void render(final GL2 gl){
  contentSpacing.getYDistances().clear();
  float yPosition=y;
  float xPosition=0;
  float fieldHeight=0;
  float fieldWidth=x;
  int iCount=0;
  for (  Integer contentID : heatMap.getContentVA()) {
    iCount++;
    fieldHeight=contentSpacing.getFieldHeight(contentID);
    if (heatMap.isHideElements() && heatMap.getContentSelectionManager().checkStatus(GLHeatMap.SELECTION_HIDDEN,contentID)) {
      contentSpacing.getYDistances().add(yPosition);
      continue;
    }
    yPosition-=fieldHeight;
    xPosition=0;
    ISet set=heatMap.getSet();
    if (set == null)     return;
    float[] certainty=new float[3];
    try {
      certainty[0]=set.getNormalizedUncertainty(contentID);
      certainty[1]=set.getNormalizedUncertainty(contentID);
      certainty[2]=set.getNormalizedUncertainty(contentID);
    }
 catch (    IllegalStateException ex) {
      certainty[0]=1f;
      certainty[1]=1f;
      certainty[2]=1f;
    }
    PixelGLConverter conv=heatMap.getParentGLCanvas().getPixelGLConverter();
    int screenHeight=conv.getPixelHeightForGLHeight(fieldHeight);
    if (screenHeight < 3) {
      int i=0;
      certainty[i]=certainty[i] > 1 ? 1 : certainty[i];
      certainty[i]=certainty[i] < 0 ? 0 : certainty[i];
      renderLine(gl,yPosition,xPosition,fieldHeight,fieldWidth,certainty[i],GLUncertaintyHeatMap.lightLight);
    }
 else {
      for (int i=0; i < certainty.length; i++) {
        float height=fieldHeight / (float)certainty.length;
        float yPos=yPosition + height * i;
        certainty[i]=certainty[i] > 1 ? 1 : certainty[i];
        certainty[i]=certainty[i] < 0 ? 0 : certainty[i];
        renderLine(gl,yPos,xPosition,height,fieldWidth,certainty[i],GLUncertaintyHeatMap.levelLightColor[i]);
      }
    }
    contentSpacing.getYDistances().add(yPosition);
  }
}