Program: 37412
Project: 37412
Buggy source:
@Override public CompletableFuture<IBreakpoint> install(){
  ClassPrepareRequest classPrepareRequest=vm.eventRequestManager().createClassPrepareRequest();
  classPrepareRequest.addClassFilter(className);
  classPrepareRequest.enable();
  requests.add(classPrepareRequest);
  ClassPrepareRequest localClassPrepareRequest=vm.eventRequestManager().createClassPrepareRequest();
  localClassPrepareRequest.addClassFilter(className + "String_Node_Str");
  localClassPrepareRequest.enable();
  requests.add(localClassPrepareRequest);
  CompletableFuture<IBreakpoint> future=new CompletableFuture<>();
  Disposable subscription=eventHub.events().filter(debugEvent -> debugEvent.event instanceof ClassPrepareEvent && (classPrepareRequest.equals(debugEvent.event.request()) || localClassPrepareRequest.equals(debugEvent.event.request()))).subscribe(debugEvent -> {
    ClassPrepareEvent event=(ClassPrepareEvent)debugEvent.event;
    List<BreakpointRequest> newRequests=createBreakpointRequests(event.referenceType(),lineNumber,hitCount);
    requests.addAll(newRequests);
    if (!newRequests.isEmpty() && !future.isDone()) {
      this.putProperty("String_Node_Str",true);
      future.complete(this);
    }
  }
);
  subscriptions.add(subscription);
  List<ReferenceType> refTypes=vm.classesByName(className);
  List<BreakpointRequest> newRequests=createBreakpointRequests(refTypes,lineNumber,hitCount);
  requests.addAll(newRequests);
  if (!newRequests.isEmpty() && !future.isDone()) {
    this.putProperty("String_Node_Str",true);
    future.complete(this);
  }
  return future;
}

Fixed version (ground truth):
@Override public CompletableFuture<IBreakpoint> install(){
  ClassPrepareRequest classPrepareRequest=vm.eventRequestManager().createClassPrepareRequest();
  classPrepareRequest.addClassFilter(className);
  classPrepareRequest.enable();
  requests.add(classPrepareRequest);
  ClassPrepareRequest localClassPrepareRequest=vm.eventRequestManager().createClassPrepareRequest();
  localClassPrepareRequest.addClassFilter(className + "String_Node_Str");
  localClassPrepareRequest.enable();
  requests.add(localClassPrepareRequest);
  CompletableFuture<IBreakpoint> future=new CompletableFuture<>();
  Disposable subscription=eventHub.events().filter(debugEvent -> debugEvent.event instanceof ClassPrepareEvent && (classPrepareRequest.equals(debugEvent.event.request()) || localClassPrepareRequest.equals(debugEvent.event.request()))).subscribe(debugEvent -> {
    ClassPrepareEvent event=(ClassPrepareEvent)debugEvent.event;
    List<BreakpointRequest> newRequests=createBreakpointRequests(event.referenceType(),lineNumber,hitCount,false);
    requests.addAll(newRequests);
    if (!newRequests.isEmpty() && !future.isDone()) {
      this.putProperty("String_Node_Str",true);
      future.complete(this);
    }
  }
);
  subscriptions.add(subscription);
  List<ReferenceType> refTypes=vm.classesByName(className);
  List<BreakpointRequest> newRequests=createBreakpointRequests(refTypes,lineNumber,hitCount,true);
  requests.addAll(newRequests);
  if (!newRequests.isEmpty() && !future.isDone()) {
    this.putProperty("String_Node_Str",true);
    future.complete(this);
  }
  return future;
}