Program: 88742
Project: 88742
Buggy source:
public void updatePart(IEditorPart part){
  if (part == null)   return;
  if (part instanceof JimpleEditor) {
    AbstractAttributesComputer aac=new JimpleAttributesComputer();
    SootAttributesJimpleColorer sajc=new SootAttributesJimpleColorer();
    SootAttrJimpleIconGenerator saji=new SootAttrJimpleIconGenerator();
    SourceViewer viewer=(SourceViewer)((AbstractTextEditor)part).getAdapter(ITextOperationTarget.class);
    SootAttributesHandler handler=aac.getAttributesHandler((AbstractTextEditor)part);
    if (handler != null) {
      if (isUpdateForOpen() || handler.isUpdate()) {
        sajc.setEditorPart(part);
        sajc.setViewer(viewer);
        sajc.setHandler(handler);
        Thread cThread=new Thread(sajc);
        cThread.start();
        saji.setHandler(handler);
        saji.setRec((IFile)aac.getRec());
        Thread iThread=new Thread(saji);
        iThread.start();
      }
    }
  }
 else {
    IEditorInput input=((AbstractTextEditor)part).getEditorInput();
    IJavaElement jElem=(IJavaElement)((IAdaptable)input).getAdapter(IJavaElement.class);
    if (!(jElem instanceof ICompilationUnit))     return;
    AbstractAttributesComputer aac=new JavaAttributesComputer();
    SootAttributesJavaColorer sajc=new SootAttributesJavaColorer();
    SootAttrJavaIconGenerator saji=new SootAttrJavaIconGenerator();
    SourceViewer viewer=(SourceViewer)((AbstractTextEditor)part).getAdapter(ITextOperationTarget.class);
    SootAttributesHandler handler=aac.getAttributesHandler((AbstractTextEditor)part);
    if (handler != null) {
      if (isUpdateForOpen() || handler.isUpdate()) {
        sajc.setEditorPart(part);
        sajc.setViewer(viewer);
        sajc.setHandler(handler);
        Thread cThread=new Thread(sajc);
        cThread.start();
        saji.setHandler(handler);
        saji.setRec((IFile)aac.getRec());
        Thread iThread=new Thread(saji);
        iThread.start();
      }
    }
  }
  setUpdateForOpen(false);
}

Fixed version (ground truth):
public void updatePart(IEditorPart part){
  if (part == null)   return;
  if (part instanceof JimpleEditor) {
    AbstractAttributesComputer aac=new JimpleAttributesComputer();
    SootAttributesJimpleColorer sajc=new SootAttributesJimpleColorer();
    SootAttrJimpleIconGenerator saji=new SootAttrJimpleIconGenerator();
    SourceViewer viewer=(SourceViewer)((AbstractTextEditor)part).getAdapter(ITextOperationTarget.class);
    SootAttributesHandler handler=aac.getAttributesHandler((AbstractTextEditor)part);
    System.out.println("String_Node_Str" + handler);
    if (handler != null) {
      System.out.println("String_Node_Str");
      System.out.println("String_Node_Str" + isUpdateForOpen());
      System.out.println("String_Node_Str" + handler.isUpdate());
      if (isUpdateForOpen() || handler.isUpdate()) {
        sajc.setEditorPart(part);
        sajc.setViewer(viewer);
        sajc.setHandler(handler);
        Thread cThread=new Thread(sajc);
        cThread.start();
        saji.setHandler(handler);
        saji.setRec((IFile)aac.getRec());
        Thread iThread=new Thread(saji);
        iThread.start();
      }
    }
  }
 else {
    IEditorInput input=((AbstractTextEditor)part).getEditorInput();
    IJavaElement jElem=(IJavaElement)((IAdaptable)input).getAdapter(IJavaElement.class);
    if (!(jElem instanceof ICompilationUnit))     return;
    AbstractAttributesComputer aac=new JavaAttributesComputer();
    SootAttributesJavaColorer sajc=new SootAttributesJavaColorer();
    SootAttrJavaIconGenerator saji=new SootAttrJavaIconGenerator();
    SourceViewer viewer=(SourceViewer)((AbstractTextEditor)part).getAdapter(ITextOperationTarget.class);
    SootAttributesHandler handler=aac.getAttributesHandler((AbstractTextEditor)part);
    System.out.println("String_Node_Str" + handler);
    if (handler != null) {
      System.out.println("String_Node_Str");
      System.out.println("String_Node_Str" + isUpdateForOpen());
      System.out.println("String_Node_Str" + handler.isUpdate());
      if (isUpdateForOpen() || handler.isUpdate()) {
        sajc.setEditorPart(part);
        sajc.setViewer(viewer);
        sajc.setHandler(handler);
        Thread cThread=new Thread(sajc);
        cThread.start();
        saji.setHandler(handler);
        saji.setRec((IFile)aac.getRec());
        Thread iThread=new Thread(saji);
        iThread.start();
      }
    }
  }
  setUpdateForOpen(false);
}