Program: 94724
Project: 94724
Buggy source:
public IStatus runInUIThread(IProgressMonitor monitor){
  final Display display=getDisplay();
  final GC context=new GC(display);
  final Image image=new Image(display,display.getBounds());
  context.copyArea(image,0,0);
  context.dispose();
  final Shell shell=new Shell(display,SWT.NO_TRIM);
  shell.setLayout(new FillLayout());
  shell.setBounds(display.getBounds());
  final GC gc=new GC(shell);
  shell.addPaintListener(new PaintListener(){
    public void paintControl(    PaintEvent e){
      gc.drawImage(image,0,0);
    }
  }
);
  shell.addKeyListener(new KeyListener(){
    public void keyPressed(    KeyEvent e){
      if (e.character == SWT.ESC)       shell.close();
    }
    public void keyReleased(    KeyEvent e){
      if (e.character == SWT.ESC)       shell.close();
    }
  }
);
  shell.addMouseListener(new MouseAdapter(){
    public void mouseDown(    MouseEvent e){
      isDragging=true;
      downX=e.x;
      downY=e.y;
    }
    public void mouseUp(    MouseEvent e){
      isDragging=false;
      final int width=Math.max(downX,e.x) - Math.min(downX,e.x);
      final int height=Math.max(downY,e.y) - Math.min(downY,e.y);
      if (width != 0 && height != 0) {
        final Image copy=new Image(display,width,height);
        gc.copyArea(copy,Math.min(downX,e.x),Math.min(downY,e.y));
        blackColor.dispose();
        whiteColor.dispose();
        final Dialog dialog=new ScreenCaptureConfirmationDialog(shell,targetID,nickName,copy,width,height,imageSender);
        dialog.open();
        shell.close();
        image.dispose();
      }
    }
  }
);
  shell.addMouseMoveListener(new MouseMoveListener(){
    public void mouseMove(    MouseEvent e){
      if (isDragging) {
        gc.drawImage(image,0,0);
        gc.setForeground(blackColor);
        gc.drawRectangle(downX,downY,e.x - downX,e.y - downY);
        gc.setForeground(whiteColor);
        gc.drawRectangle(downX - 1,downY - 1,e.x - downX + 2,e.y - downY + 2);
      }
    }
  }
);
  shell.setCursor(new Cursor(getDisplay(),SWT.CURSOR_CROSS));
  shell.open();
  while (!shell.isDisposed()) {
    if (!display.readAndDispatch()) {
      display.sleep();
    }
  }
  return Status.OK_STATUS;
}

Fixed version (ground truth):
public IStatus runInUIThread(IProgressMonitor monitor){
  final Display display=getDisplay();
  final GC context=new GC(display);
  final Rectangle displayBounds=display.getBounds();
  final Image image=new Image(display,displayBounds);
  context.copyArea(image,displayBounds.x,displayBounds.y);
  context.dispose();
  final Shell shell=new Shell(display,SWT.NO_TRIM);
  shell.setLayout(new FillLayout());
  shell.setBounds(displayBounds);
  final GC gc=new GC(shell);
  shell.addPaintListener(new PaintListener(){
    public void paintControl(    PaintEvent e){
      gc.drawImage(image,0,0);
    }
  }
);
  shell.addKeyListener(new KeyListener(){
    public void keyPressed(    KeyEvent e){
      if (e.character == SWT.ESC)       shell.close();
    }
    public void keyReleased(    KeyEvent e){
      if (e.character == SWT.ESC)       shell.close();
    }
  }
);
  shell.addMouseListener(new MouseAdapter(){
    public void mouseDown(    MouseEvent e){
      isDragging=true;
      downX=e.x;
      downY=e.y;
    }
    public void mouseUp(    MouseEvent e){
      isDragging=false;
      final int width=Math.max(downX,e.x) - Math.min(downX,e.x);
      final int height=Math.max(downY,e.y) - Math.min(downY,e.y);
      if (width != 0 && height != 0) {
        final Image copy=new Image(display,width,height);
        gc.copyArea(copy,Math.min(downX,e.x),Math.min(downY,e.y));
        blackColor.dispose();
        whiteColor.dispose();
        final Dialog dialog=new ScreenCaptureConfirmationDialog(shell,targetID,nickName,copy,width,height,imageSender);
        dialog.open();
        shell.close();
        image.dispose();
      }
    }
  }
);
  shell.addMouseMoveListener(new MouseMoveListener(){
    public void mouseMove(    MouseEvent e){
      if (isDragging) {
        gc.drawImage(image,0,0);
        gc.setForeground(blackColor);
        gc.drawRectangle(downX,downY,e.x - downX,e.y - downY);
        gc.setForeground(whiteColor);
        gc.drawRectangle(downX - 1,downY - 1,e.x - downX + 2,e.y - downY + 2);
      }
    }
  }
);
  shell.setCursor(new Cursor(getDisplay(),SWT.CURSOR_CROSS));
  shell.open();
  while (!shell.isDisposed()) {
    if (!display.readAndDispatch()) {
      display.sleep();
    }
  }
  return Status.OK_STATUS;
}