Program: 3822
Project: 3822
Buggy source:
private void extractPathFromRequestMeta(final ServiceMethodMeta methodMeta,final MethodAccess methodAccess,final RequestMeta requestMeta,final PathBuilder pathBuilder,final RequestMethod requestMethod){
  final OperationBuilder operationBuilder=new OperationBuilder();
  operationBuilder.setDescription(methodMeta.getDescription());
  operationBuilder.setSummary(methodMeta.getSummary());
  addParameters(operationBuilder,requestMeta.getParameters());
  operationBuilder.setOperationId(methodAccess.name());
  if (methodMeta.hasReturn()) {
    final ResponseBuilder responseBuilder=new ResponseBuilder();
    if (methodMeta.isReturnMap()) {
    }
 else     if (methodMeta.isReturnCollection() || methodMeta.isReturnArray()) {
      responseBuilder.setSchema(definitionClassCollector.getSchema(methodMeta.getReturnType(),methodMeta.getReturnTypeComponent()));
      responseBuilder.setDescription(methodMeta.getReturnDescription());
      operationBuilder.getResponses().put(200,responseBuilder.build());
      operationBuilder.getProduces().add("String_Node_Str");
    }
 else {
      responseBuilder.setSchema(definitionClassCollector.getSchema(methodMeta.getReturnType()));
      responseBuilder.setDescription(methodMeta.getReturnDescription());
      operationBuilder.getResponses().put(200,responseBuilder.build());
      operationBuilder.getProduces().add("String_Node_Str");
    }
  }
 else {
    final ResponseBuilder responseBuilder=new ResponseBuilder();
    final SchemaBuilder schemaBuilder=new SchemaBuilder();
    schemaBuilder.setType("String_Node_Str");
    responseBuilder.setSchema(schemaBuilder.build());
    responseBuilder.setDescription("String_Node_Str");
    operationBuilder.getResponses().put(202,responseBuilder.build());
  }
switch (requestMethod) {
case GET:
    pathBuilder.setGet(operationBuilder.build());
  break;
case POST:
pathBuilder.setPost(operationBuilder.build());
break;
case PUT:
pathBuilder.setPut(operationBuilder.build());
break;
case OPTIONS:
pathBuilder.setOptions(operationBuilder.build());
break;
case DELETE:
pathBuilder.setDelete(operationBuilder.build());
break;
case HEAD:
pathBuilder.setHead(operationBuilder.build());
break;
}
}

Fixed version (ground truth):
private void extractPathFromRequestMeta(final ServiceMethodMeta methodMeta,final MethodAccess methodAccess,final RequestMeta requestMeta,final PathBuilder pathBuilder,final RequestMethod requestMethod){
  final OperationBuilder operationBuilder=new OperationBuilder();
  operationBuilder.setDescription(methodMeta.getDescription());
  operationBuilder.setSummary(methodMeta.getSummary());
  addParameters(operationBuilder,requestMeta.getParameters());
  operationBuilder.setOperationId(methodAccess.name());
  if (methodMeta.hasReturn()) {
    final ResponseBuilder responseBuilder=new ResponseBuilder();
    if (methodMeta.isReturnMap()) {
    }
 else     if (methodMeta.isReturnCollection() || methodMeta.isReturnArray()) {
      responseBuilder.setSchema(definitionClassCollector.getSchemaWithComponentClass(methodMeta.getReturnType(),methodMeta.getReturnTypeComponent()));
      responseBuilder.setDescription(methodMeta.getReturnDescription());
      operationBuilder.getResponses().put(200,responseBuilder.build());
      operationBuilder.getProduces().add("String_Node_Str");
    }
 else {
      responseBuilder.setSchema(definitionClassCollector.getSchema(methodMeta.getReturnType()));
      responseBuilder.setDescription(methodMeta.getReturnDescription());
      operationBuilder.getResponses().put(200,responseBuilder.build());
      operationBuilder.getProduces().add("String_Node_Str");
    }
  }
 else {
    final ResponseBuilder responseBuilder=new ResponseBuilder();
    final SchemaBuilder schemaBuilder=new SchemaBuilder();
    schemaBuilder.setType("String_Node_Str");
    responseBuilder.setSchema(schemaBuilder.build());
    responseBuilder.setDescription("String_Node_Str");
    operationBuilder.getResponses().put(202,responseBuilder.build());
  }
switch (requestMethod) {
case GET:
    pathBuilder.setGet(operationBuilder.build());
  break;
case POST:
pathBuilder.setPost(operationBuilder.build());
break;
case PUT:
pathBuilder.setPut(operationBuilder.build());
break;
case OPTIONS:
pathBuilder.setOptions(operationBuilder.build());
break;
case DELETE:
pathBuilder.setDelete(operationBuilder.build());
break;
case HEAD:
pathBuilder.setHead(operationBuilder.build());
break;
}
}