Program: 59089
Project: 59089
Buggy source:
public void render(final GLAutoDrawable drawable){
  GL gl=drawable.getGL();
  int iLineCount=0;
  int viewport[]=new int[4];
  gl.glGetIntegerv(GL.GL_VIEWPORT,viewport,0);
  int panelHeight=0;
  if (sAlContent.isEmpty())   panelHeight=0;
 else   panelHeight=(sAlContent.size() + 1) * AInfoOverlayRenderStyle.LINE_HEIGHT;
  if (panelHeight > AInfoOverlayRenderStyle.MAX_OVERLAY_HEIGHT)   panelHeight=AInfoOverlayRenderStyle.MAX_OVERLAY_HEIGHT;
  if (drawable.getWidth() == 0 || drawable.getHeight() == 0)   return;
  Graphics2D g2d=glOverlay.createGraphics();
  g2d.setComposite(AlphaComposite.Src);
  int iXPos=(viewport[2] - AInfoOverlayRenderStyle.OVERLAY_WIDTH) / 2;
  int iYPos=0;
  g2d.setColor(new Color(1,1,1,0));
  g2d.fillRect(iXPos,iYPos,AInfoOverlayRenderStyle.OVERLAY_WIDTH,AInfoOverlayRenderStyle.MAX_OVERLAY_HEIGHT);
  g2d.setColor(AInfoOverlayRenderStyle.backgroundColor);
  g2d.fillRect(iXPos,iYPos,AInfoOverlayRenderStyle.OVERLAY_WIDTH,panelHeight);
  g2d.setColor(AInfoOverlayRenderStyle.borderColor);
  g2d.drawRect(iXPos,iYPos,AInfoOverlayRenderStyle.OVERLAY_WIDTH,panelHeight);
  g2d.setColor(AInfoOverlayRenderStyle.fontColor);
  g2d.setFont(font);
  Iterator<String> iterContentCreator=sAlContent.iterator();
  while (iterContentCreator.hasNext()) {
    iLineCount++;
    g2d.drawString(iterContentCreator.next(),(viewport[2] - AInfoOverlayRenderStyle.OVERLAY_WIDTH) / 2 + 10,iLineCount * AInfoOverlayRenderStyle.LINE_HEIGHT);
  }
  glOverlay.markDirty((viewport[2] - AInfoOverlayRenderStyle.OVERLAY_WIDTH) / 2,0,AInfoOverlayRenderStyle.OVERLAY_WIDTH,AInfoOverlayRenderStyle.MAX_OVERLAY_HEIGHT);
  glOverlay.drawAll();
  g2d.dispose();
}

Fixed version (ground truth):
public void render(final GLAutoDrawable drawable){
  GL gl=drawable.getGL();
  int iLineCount=0;
  int viewport[]=new int[4];
  gl.glGetIntegerv(GL.GL_VIEWPORT,viewport,0);
  int panelHeight=0;
  if (sAlContent.isEmpty())   panelHeight=0;
 else   panelHeight=(sAlContent.size() + 1) * AInfoOverlayRenderStyle.LINE_HEIGHT;
  if (panelHeight > AInfoOverlayRenderStyle.MAX_OVERLAY_HEIGHT)   panelHeight=AInfoOverlayRenderStyle.MAX_OVERLAY_HEIGHT;
  if (drawable.getWidth() == 0 || drawable.getHeight() == 0)   return;
  Graphics2D g2d=glOverlay.createGraphics();
  g2d.setComposite(AlphaComposite.Src);
  int iXPos=(viewport[2] - AInfoOverlayRenderStyle.OVERLAY_WIDTH) / 2;
  int iYPos=0;
  g2d.setColor(new Color(1,1,1,0));
  g2d.fillRect(iXPos,iYPos,AInfoOverlayRenderStyle.OVERLAY_WIDTH,AInfoOverlayRenderStyle.MAX_OVERLAY_HEIGHT);
  g2d.setColor(AInfoOverlayRenderStyle.backgroundColor);
  g2d.fillRect(iXPos,iYPos,AInfoOverlayRenderStyle.OVERLAY_WIDTH,panelHeight);
  g2d.setColor(AInfoOverlayRenderStyle.borderColor);
  g2d.drawRect(iXPos,iYPos,AInfoOverlayRenderStyle.OVERLAY_WIDTH - 1,panelHeight);
  g2d.setColor(AInfoOverlayRenderStyle.fontColor);
  g2d.setFont(font);
  Iterator<String> iterContentCreator=sAlContent.iterator();
  while (iterContentCreator.hasNext()) {
    iLineCount++;
    g2d.drawString(iterContentCreator.next(),(viewport[2] - AInfoOverlayRenderStyle.OVERLAY_WIDTH) / 2 + 10,iLineCount * AInfoOverlayRenderStyle.LINE_HEIGHT);
  }
  glOverlay.markDirty((viewport[2] - AInfoOverlayRenderStyle.OVERLAY_WIDTH) / 2,0,AInfoOverlayRenderStyle.OVERLAY_WIDTH,AInfoOverlayRenderStyle.MAX_OVERLAY_HEIGHT);
  glOverlay.drawAll();
  g2d.dispose();
}