Program: 54799
Project: 54799
Buggy source:
private boolean checkFields(TreeLogger logger,JClassType classOrInterface,boolean isSpeculative,Path parent){
  TypeInfoComputed typeInfo=getTypeInfoComputed(classOrInterface,parent);
  JClassType superType=classOrInterface.getSuperclass();
  if (superType != null && getTypeInfoComputed(superType,parent).isDeclaredSerializable()) {
    boolean superTypeOk=checkFields(logger,superType,isSpeculative,parent);
    if (!superTypeOk && !typeInfo.isDirectlySerializable()) {
      return false;
    }
  }
  if (typeInfo.isManuallySerializable()) {
    isSpeculative=true;
  }
  boolean allSucceeded=true;
  JField[] fields=classOrInterface.getFields();
  if (fields.length > 0) {
    TreeLogger localLogger=logger.branch(TreeLogger.DEBUG,"String_Node_Str",null);
    for (    JField field : fields) {
      if (!qualfiesForSerialization(localLogger,field)) {
        continue;
      }
      TreeLogger fieldLogger=localLogger.branch(TreeLogger.DEBUG,field.toString(),null);
      JType fieldType=field.getType();
      Path path=createFieldPath(parent,field);
      if (typeInfo.isManuallySerializable() && fieldType.getLeafType() == typeOracle.getJavaLangObject()) {
        checkAllSubtypesOfObject(fieldLogger.branch(TreeLogger.WARN,"String_Node_Str",null),path);
      }
 else {
        allSucceeded&=checkTypeInstantiable(fieldLogger,fieldType,isSpeculative,path);
      }
    }
  }
  boolean succeeded=allSucceeded || typeInfo.isManuallySerializable();
  if (succeeded) {
    getTypeInfoComputed(classOrInterface,parent).setFieldSerializable();
  }
  return succeeded;
}

Fixed version (ground truth):
private boolean checkFields(TreeLogger logger,JClassType classOrInterface,boolean isSpeculative,Path parent){
  TypeInfoComputed typeInfo=getTypeInfoComputed(classOrInterface,parent);
  JClassType superType=classOrInterface.getSuperclass();
  if (superType != null && getTypeInfoComputed(superType,parent).isDeclaredSerializable()) {
    boolean superTypeOk=checkFields(logger,superType,isSpeculative,parent);
    if (!superTypeOk && !typeInfo.isDirectlySerializable()) {
      return false;
    }
  }
  if (typeInfo.isManuallySerializable()) {
    isSpeculative=true;
  }
  boolean allSucceeded=true;
  JField[] fields=classOrInterface.getFields();
  if (fields.length > 0) {
    TreeLogger localLogger=logger.branch(TreeLogger.DEBUG,"String_Node_Str" + classOrInterface.getParameterizedQualifiedSourceName() + "String_Node_Str",null);
    for (    JField field : fields) {
      if (!qualfiesForSerialization(localLogger,field)) {
        continue;
      }
      TreeLogger fieldLogger=localLogger.branch(TreeLogger.DEBUG,field.toString(),null);
      JType fieldType=field.getType();
      Path path=createFieldPath(parent,field);
      if (typeInfo.isManuallySerializable() && fieldType.getLeafType() == typeOracle.getJavaLangObject()) {
        checkAllSubtypesOfObject(fieldLogger.branch(TreeLogger.WARN,"String_Node_Str",null),path);
      }
 else {
        allSucceeded&=checkTypeInstantiable(fieldLogger,fieldType,isSpeculative,path);
      }
    }
  }
  boolean succeeded=allSucceeded || typeInfo.isManuallySerializable();
  if (succeeded) {
    getTypeInfoComputed(classOrInterface,parent).setFieldSerializable();
  }
  return succeeded;
}