Program: 168194
Project: 168194
Buggy source:
private boolean canProceedJob(){
  NlputilsFormComposite.updateStatusMessage(getViewSite(),null,null);
  boolean canProceed=true;
  form.getMessageManager().removeMessage("String_Node_Str");
  form.getMessageManager().removeMessage("String_Node_Str");
  form.getMessageManager().removeMessage("String_Node_Str");
  form.getMessageManager().removeMessage("String_Node_Str");
  String message=OutputPathValidation.getInstance().validateOutputDirectory(layoutData.getOutputLabel().getText(),"String_Node_Str");
  if (message != null) {
    message=layoutData.getOutputLabel().getText() + "String_Node_Str" + message;
    form.getMessageManager().addMessage("String_Node_Str",message,null,IMessageProvider.ERROR);
    canProceed=false;
  }
  String inputMessage=OutputPathValidation.getInstance().validateOutputDirectory(inputLayoutData.getOutputLabel().getText(),"String_Node_Str");
  if (inputMessage != null) {
    inputMessage=layoutData.getOutputLabel().getText() + "String_Node_Str" + inputMessage;
    form.getMessageManager().addMessage("String_Node_Str",inputMessage,null,IMessageProvider.ERROR);
    canProceed=false;
  }
  String seedFileMsg=OutputPathValidation.getInstance().validateOutputDirectory(seedFileText.getText(),"String_Node_Str");
  if (seedFileMsg != null) {
    seedFileMsg=seedFileText.getText() + "String_Node_Str" + seedFileMsg;
    form.getMessageManager().addMessage("String_Node_Str",seedFileMsg,null,IMessageProvider.ERROR);
    canProceed=false;
  }
  if (Integer.parseInt(topics.getText()) < 1) {
    form.getMessageManager().addMessage("String_Node_Str","String_Node_Str",null,IMessageProvider.ERROR);
    canProceed=false;
  }
  return canProceed;
}

Fixed version (ground truth):
private boolean canProceedJob(){
  NlputilsFormComposite.updateStatusMessage(getViewSite(),null,null);
  boolean canProceed=true;
  form.getMessageManager().removeMessage("String_Node_Str");
  form.getMessageManager().removeMessage("String_Node_Str");
  form.getMessageManager().removeMessage("String_Node_Str");
  form.getMessageManager().removeMessage("String_Node_Str");
  String message=OutputPathValidation.getInstance().validateOutputDirectory(layoutData.getOutputLabel().getText(),"String_Node_Str");
  if (message != null) {
    message=layoutData.getOutputLabel().getText() + "String_Node_Str" + message;
    form.getMessageManager().addMessage("String_Node_Str",message,null,IMessageProvider.ERROR);
    canProceed=false;
  }
  String inputMessage=OutputPathValidation.getInstance().validateOutputDirectory(inputLayoutData.getOutputLabel().getText(),"String_Node_Str");
  if (inputMessage != null) {
    inputMessage=inputLayoutData.getOutputLabel().getText() + "String_Node_Str" + inputMessage;
    form.getMessageManager().addMessage("String_Node_Str",inputMessage,null,IMessageProvider.ERROR);
    canProceed=false;
  }
  String seedFileMsg=OutputPathValidation.getInstance().validateOutputDirectory(seedFileText.getText(),"String_Node_Str");
  if (seedFileMsg != null) {
    seedFileMsg=seedFileText.getText() + "String_Node_Str" + seedFileMsg;
    form.getMessageManager().addMessage("String_Node_Str",seedFileMsg,null,IMessageProvider.ERROR);
    canProceed=false;
  }
  if (Integer.parseInt(topics.getText()) < 1) {
    form.getMessageManager().addMessage("String_Node_Str","String_Node_Str",null,IMessageProvider.ERROR);
    canProceed=false;
  }
  return canProceed;
}