Program: 24736
Project: 24736
Buggy source:
public void setBreadCrumb(String viewId,String crumb){
  this.breadCrumbPane.clear();
  Hyperlink chooseCase=new Hyperlink(messages.chooseCase(),ChooseCasePilot.generateNavigationId(ChooseCasePilot.PageId.home));
  HorizontalPanel crumbBar=new HorizontalPanel();
  Label crumbText=new Label(crumb);
  crumbText.setStyleName("String_Node_Str");
  chooseCase.setStyleName("String_Node_Str");
  if (crumb.trim().length() != 0) {
    Hyperlink chooseStep=new Hyperlink(this.currentState.getProjectName(),ChooseStepPilot.generateNavigationId(ChooseStepPilot.PageId.home));
    Hyperlink chooseStepCase3=new Hyperlink(this.currentState.getProjectName(),ChooseStepCase3Pilot.generateNavigationId(ChooseStepCase3Pilot.PageId.home));
    chooseStep.setStyleName("String_Node_Str");
    crumbBar.add(chooseCase);
    System.out.println("String_Node_Str" + chooseCase);
    Hyperlink chooseProject=new Hyperlink(this.currentState.getCaseName(),HomePilot.generateNavigationId(HomePilot.PageId.home));
    chooseProject.setStyleName("String_Node_Str");
    if (this.currentState.getProjectName() != "String_Node_Str") {
      crumbBar.add(new Label("String_Node_Str"));
      crumbBar.add(chooseProject);
      crumbBar.add(new Label("String_Node_Str"));
      if (this.currentState.getCaseID() == 1)       crumbBar.add(chooseStep);
 else       if (this.currentState.getCaseID() == 3)       crumbBar.add(chooseStepCase3);
    }
    crumbBar.add(new Label("String_Node_Str"));
    crumbBar.add(crumbText);
    crumbBar.setSpacing(4);
  }
  this.breadCrumbPane.add(crumbBar);
}

Fixed version (ground truth):
public void setBreadCrumb(String viewId,String crumb){
  this.breadCrumbPane.clear();
  Hyperlink chooseCase=new Hyperlink(messages.chooseCase(),ChooseCasePilot.generateNavigationId(ChooseCasePilot.PageId.home));
  HorizontalPanel crumbBar=new HorizontalPanel();
  Label crumbText=new Label(crumb);
  crumbText.setStyleName("String_Node_Str");
  chooseCase.setStyleName("String_Node_Str");
  if (crumb.trim().length() != 0) {
    Hyperlink chooseStep=new Hyperlink(this.currentState.getProjectName(),ChooseStepPilot.generateNavigationId(ChooseStepPilot.PageId.home));
    Hyperlink chooseStepCase3=new Hyperlink(this.currentState.getProjectName(),ChooseStepCase3Pilot.generateNavigationId(ChooseStepCase3Pilot.PageId.home));
    chooseStep.setStyleName("String_Node_Str");
    chooseStepCase3.setStyleName("String_Node_Str");
    crumbBar.add(chooseCase);
    System.out.println("String_Node_Str" + chooseCase);
    Hyperlink chooseProject=new Hyperlink(this.currentState.getCaseName(),HomePilot.generateNavigationId(HomePilot.PageId.home));
    chooseProject.setStyleName("String_Node_Str");
    if (this.currentState.getProjectName() != "String_Node_Str") {
      crumbBar.add(new Label("String_Node_Str"));
      System.out.println("String_Node_Str" + this.currentState.getProjectName() + "String_Node_Str"+ this.currentState.getCaseID());
      crumbBar.add(chooseProject);
      crumbBar.add(new Label("String_Node_Str"));
      if (this.currentState.getCaseID() == 1)       crumbBar.add(chooseStep);
 else       if (this.currentState.getCaseID() == 3)       crumbBar.add(chooseStepCase3);
    }
    crumbBar.add(new Label("String_Node_Str"));
    crumbBar.add(crumbText);
    crumbBar.setSpacing(4);
  }
  this.breadCrumbPane.add(crumbBar);
}