Program: 71788
Project: 71788
Buggy source:
public void paintControl(PaintEvent pe){
  Color cBackground=null;
  try {
    Color clrTransparencyBackground=Display.getCurrent().getSystemColor(SWT.COLOR_LIST_BACKGROUND);
    GC gc=pe.gc;
    if (!this.isEnabled()) {
      gc.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_WIDGET_BACKGROUND));
      Color cFore=Display.getCurrent().getSystemColor(SWT.COLOR_DARK_GRAY);
      gc.setForeground(cFore);
      if (fCurrent == null || fCurrent instanceof ColorDefinition && ((ColorDefinition)fCurrent).getTransparency() == 0) {
        gc.fillRectangle(0,0,this.getSize().x,this.getSize().y);
        if (!isAutoEnabled || fCurrent != null) {
          gc.drawText(Messages.getString("String_Node_Str"),2,2);
        }
 else {
          gc.drawText(Messages.getString("String_Node_Str"),2,2);
        }
      }
 else {
        gc.fillRectangle(0,0,this.getSize().x,this.getSize().y);
        gc.setBackground(cFore);
        gc.fillRectangle(2,2,this.getSize().x - 4,this.getSize().y - 4);
      }
    }
 else {
      if (fCurrent == null || fCurrent instanceof ColorDefinition && ((ColorDefinition)fCurrent).getTransparency() == 0) {
        gc.setBackground(clrTransparencyBackground);
        gc.fillRectangle(0,0,this.getSize().x,this.getSize().y);
        Color cText=new Color(this.getDisplay(),0,0,0);
        gc.setForeground(cText);
        if (!isAutoEnabled || fCurrent != null) {
          gc.drawText(Messages.getString("String_Node_Str"),2,2);
        }
 else {
          gc.drawText(Messages.getString("String_Node_Str"),2,2);
        }
        cText.dispose();
      }
 else {
        if (fCurrent instanceof ColorDefinition) {
          cBackground=new Color(Display.getDefault(),((ColorDefinition)fCurrent).getRed(),((ColorDefinition)fCurrent).getGreen(),((ColorDefinition)fCurrent).getBlue());
          gc.setBackground(cBackground);
          gc.fillRectangle(2,2,this.getSize().x - 4,this.getSize().y - 4);
        }
 else         if (fCurrent instanceof Image) {
          gc.fillRectangle(2,2,getSize().x - 4,this.getSize().y - 4);
          gc.drawImage(getSWTImage((Image)fCurrent),2,2);
        }
 else         if (fCurrent instanceof Gradient) {
          fillGradient(gc);
        }
 else         if (fCurrent instanceof MultipleFill) {
          if (((MultipleFill)fCurrent).getFills() == null) {
            return;
          }
          Color clr1=null;
          Color clr2=null;
          if (((MultipleFill)fCurrent).getFills().get(0) != null) {
            ColorDefinition cd1=(ColorDefinition)((MultipleFill)fCurrent).getFills().get(0);
            clr1=new Color(Display.getDefault(),cd1.getRed(),cd1.getGreen(),cd1.getBlue());
            gc.setBackground(clr1);
            gc.fillRectangle(2,2,(this.getSize().x) / 2 - 2,this.getSize().y - 4);
          }
          if (((MultipleFill)fCurrent).getFills().get(1) != null) {
            ColorDefinition cd2=(ColorDefinition)((MultipleFill)fCurrent).getFills().get(1);
            clr2=new Color(Display.getDefault(),cd2.getRed(),cd2.getGreen(),cd2.getBlue());
            gc.setBackground(clr2);
            gc.fillRectangle((this.getSize().x) / 2,2,this.getSize().x / 2 - 2,this.getSize().y - 4);
          }
        }
      }
      if (isFocusControl()) {
        gc.setLineStyle(SWT.LINE_DOT);
        gc.setForeground(Display.getCurrent().getSystemColor(SWT.COLOR_BLACK));
        gc.drawRectangle(1,1,getSize().x - 3,this.getSize().y - 3);
      }
    }
  }
 catch (  Exception ex) {
    logger.log(ex);
  }
 finally {
    if (cBackground != null) {
      cBackground.dispose();
    }
  }
}

Fixed version (ground truth):
public void paintControl(PaintEvent pe){
  Color cBackground=null;
  try {
    Color clrTransparencyBackground=Display.getCurrent().getSystemColor(SWT.COLOR_LIST_BACKGROUND);
    GC gc=pe.gc;
    if (!this.isEnabled()) {
      gc.setBackground(Display.getCurrent().getSystemColor(SWT.COLOR_WIDGET_BACKGROUND));
      Color cFore=Display.getCurrent().getSystemColor(SWT.COLOR_DARK_GRAY);
      gc.setForeground(cFore);
      if (fCurrent == null || fCurrent instanceof ColorDefinition && ((ColorDefinition)fCurrent).getTransparency() == 0) {
        gc.fillRectangle(0,0,this.getSize().x,this.getSize().y);
        if (!isAutoEnabled || fCurrent != null) {
          gc.drawText(Messages.getString("String_Node_Str"),2,2);
        }
 else {
          gc.drawText(Messages.getString("String_Node_Str"),2,2);
        }
      }
 else {
        gc.fillRectangle(0,0,this.getSize().x,this.getSize().y);
        gc.setBackground(cFore);
        gc.fillRectangle(2,2,this.getSize().x - 4,this.getSize().y - 4);
      }
    }
 else {
      if (fCurrent == null || fCurrent instanceof ColorDefinition && ((ColorDefinition)fCurrent).getTransparency() == 0) {
        gc.setBackground(clrTransparencyBackground);
        gc.fillRectangle(0,0,this.getSize().x,this.getSize().y);
        Color cText=Display.getDefault().getSystemColor(SWT.COLOR_LIST_FOREGROUND);
        gc.setForeground(cText);
        if (!isAutoEnabled || fCurrent != null) {
          gc.drawText(Messages.getString("String_Node_Str"),2,2);
        }
 else {
          gc.drawText(Messages.getString("String_Node_Str"),2,2);
        }
        cText.dispose();
      }
 else {
        if (fCurrent instanceof ColorDefinition) {
          cBackground=new Color(Display.getDefault(),((ColorDefinition)fCurrent).getRed(),((ColorDefinition)fCurrent).getGreen(),((ColorDefinition)fCurrent).getBlue());
          gc.setBackground(cBackground);
          gc.fillRectangle(2,2,this.getSize().x - 4,this.getSize().y - 4);
        }
 else         if (fCurrent instanceof Image) {
          gc.fillRectangle(2,2,getSize().x - 4,this.getSize().y - 4);
          gc.drawImage(getSWTImage((Image)fCurrent),2,2);
        }
 else         if (fCurrent instanceof Gradient) {
          fillGradient(gc);
        }
 else         if (fCurrent instanceof MultipleFill) {
          if (((MultipleFill)fCurrent).getFills() == null) {
            return;
          }
          Color clr1=null;
          Color clr2=null;
          if (((MultipleFill)fCurrent).getFills().get(0) != null) {
            ColorDefinition cd1=(ColorDefinition)((MultipleFill)fCurrent).getFills().get(0);
            clr1=new Color(Display.getDefault(),cd1.getRed(),cd1.getGreen(),cd1.getBlue());
            gc.setBackground(clr1);
            gc.fillRectangle(2,2,(this.getSize().x) / 2 - 2,this.getSize().y - 4);
          }
          if (((MultipleFill)fCurrent).getFills().get(1) != null) {
            ColorDefinition cd2=(ColorDefinition)((MultipleFill)fCurrent).getFills().get(1);
            clr2=new Color(Display.getDefault(),cd2.getRed(),cd2.getGreen(),cd2.getBlue());
            gc.setBackground(clr2);
            gc.fillRectangle((this.getSize().x) / 2,2,this.getSize().x / 2 - 2,this.getSize().y - 4);
          }
        }
      }
      if (isFocusControl()) {
        gc.setLineStyle(SWT.LINE_DOT);
        gc.setForeground(Display.getCurrent().getSystemColor(SWT.COLOR_BLACK));
        gc.drawRectangle(1,1,getSize().x - 3,this.getSize().y - 3);
      }
    }
  }
 catch (  Exception ex) {
    logger.log(ex);
  }
 finally {
    if (cBackground != null) {
      cBackground.dispose();
    }
  }
}