Recently, scores of high-performing code generation systems have surfaced. As has become a popular choice in many domains, code generation is often approached using large language models as a core, trained under the masked or causal language modeling schema. This work shows that current code generation systems exhibit biases inherited from large language model backbones, which might leak into generated code under specific circumstances. To investigate the effect, we propose a framework that automatically removes hints and exposes various biases that these code generation models use. We apply our framework to three coding challenges and test it across top-performing coding generation models. Our experiments reveal biases towards specific prompt structure and exploitation of keywords during code generation. Finally, we demonstrate how to use our framework as a data transformation technique, which we find a promising direction toward more robust code generation.

本文探究了现有代码生成系统中基于大型语言模型的偏见在特定情况下可能泄漏到生成代码中的问题，提出了一种自动消除提示并暴露各种偏见的框架，并将其应用于三个编码挑战中测试，发现代码生成模型存在特定提示结构和关键字的偏见，最后，我们展示了如何将我们的框架作为数据转换技术，这是更强大的代码生成方向。

发现代码生成中偏差的简单而有效方法