Program: 34406
Project: 34406
Buggy source:
void show(){
  final String resource=className.replace('.','/') + "String_Node_Str";
  final ProgressHandle handle=ProgressHandleFactory.createHandle(NbBundle.getMessage(StackLineAnalyser.class,"String_Node_Str",resource));
  handle.start();
  RP.execute(new Runnable(){
    @Override public void run(){
      DataObject dobj=null;
      try {
        final ClassPath classPath=ClassPathSupport.createClassPath(GlobalPathRegistry.getDefault().getSourceRoots().toArray(new FileObject[0]));
        dobj=findDataObject(classPath.findResource(resource));
      }
  finally {
        final DataObject dataObject=dobj;
        Mutex.EVENT.readAccess(new Runnable(){
          @Override public void run(){
            try {
              if (dataObject == null) {
                StatusDisplayer.getDefault().setStatusText(NbBundle.getMessage(StackLineAnalyser.class,"String_Node_Str",new Object[]{resource}));
                return;
              }
              try {
                EditorCookie editorCookie=(EditorCookie)dataObject.getCookie(EditorCookie.class);
                LineCookie lineCookie=(LineCookie)dataObject.getCookie(LineCookie.class);
                if (editorCookie != null && lineCookie != null && lineNumber != -1) {
                  StyledDocument doc=editorCookie.openDocument();
                  if (doc != null) {
                    if (lineNumber != -1) {
                      try {
                        Line l=lineCookie.getLineSet().getCurrent(lineNumber - 1);
                        if (l != null) {
                          l.show(Line.SHOW_GOTO);
                          return;
                        }
                      }
 catch (                      IndexOutOfBoundsException oob) {
                        StatusDisplayer.getDefault().setStatusText(NbBundle.getMessage(StackLineAnalyser.class,"String_Node_Str",new Object[]{lineNumber}));
                      }
                    }
                  }
                }
                OpenCookie openCookie=(OpenCookie)dataObject.getCookie(OpenCookie.class);
                if (openCookie != null) {
                  openCookie.open();
                  return;
                }
              }
 catch (              IOException e) {
                Exceptions.printStackTrace(e);
              }
            }
  finally {
              handle.finish();
            }
          }
        }
);
      }
    }
  }
);
}

Fixed version (ground truth):
void show(){
  String name=className.replace('.','/');
  final List<String> resources=new ArrayList<>();
  resources.add(name + "String_Node_Str");
  int idx=name.lastIndexOf('$');
  while (idx >= 0) {
    name=name.substring(0,idx);
    resources.add(name + "String_Node_Str");
    idx=name.lastIndexOf('$');
  }
  final ProgressHandle handle=ProgressHandleFactory.createHandle(NbBundle.getMessage(StackLineAnalyser.class,"String_Node_Str",resources.get(0)));
  handle.start();
  RP.execute(new Runnable(){
    @Override public void run(){
      DataObject dobj=null;
      try {
        final ClassPath classPath=ClassPathSupport.createClassPath(GlobalPathRegistry.getDefault().getSourceRoots().toArray(new FileObject[0]));
        for (        String resource : resources) {
          dobj=findDataObject(classPath.findResource(resource));
          if (dobj != null)           break;
        }
      }
  finally {
        final DataObject dataObject=dobj;
        Mutex.EVENT.readAccess(new Runnable(){
          @Override public void run(){
            try {
              if (dataObject == null) {
                StatusDisplayer.getDefault().setStatusText(NbBundle.getMessage(StackLineAnalyser.class,"String_Node_Str",new Object[]{resources.get(0)}));
                return;
              }
              try {
                EditorCookie editorCookie=(EditorCookie)dataObject.getCookie(EditorCookie.class);
                LineCookie lineCookie=(LineCookie)dataObject.getCookie(LineCookie.class);
                if (editorCookie != null && lineCookie != null && lineNumber != -1) {
                  StyledDocument doc=editorCookie.openDocument();
                  if (doc != null) {
                    if (lineNumber != -1) {
                      try {
                        Line l=lineCookie.getLineSet().getCurrent(lineNumber - 1);
                        if (l != null) {
                          l.show(Line.SHOW_GOTO);
                          return;
                        }
                      }
 catch (                      IndexOutOfBoundsException oob) {
                        StatusDisplayer.getDefault().setStatusText(NbBundle.getMessage(StackLineAnalyser.class,"String_Node_Str",new Object[]{lineNumber}));
                      }
                    }
                  }
                }
                OpenCookie openCookie=(OpenCookie)dataObject.getCookie(OpenCookie.class);
                if (openCookie != null) {
                  openCookie.open();
                  return;
                }
              }
 catch (              IOException e) {
                Exceptions.printStackTrace(e);
              }
            }
  finally {
              handle.finish();
            }
          }
        }
);
      }
    }
  }
);
}