In this paper, we consider contamination by code generation test sets, in particular in their use in modern large language models. We discuss three possible sources of such contamination and show findings supporting each of them: (i) direct data leakage, (ii) indirect data leakage through the use of synthetic data and (iii) overfitting to evaluation sets during model selection. To address this, we release Less Basic Python Problems (LBPP): an uncontaminated new benchmark of 161 prompts with their associated Python solutions. LBPP is released at https://huggingface.co/datasets/CohereForAI/lbpp .
@article{arxiv.2407.07565,
title = {On Leakage of Code Generation Evaluation Datasets},
author = {Alexandre Matton and Tom Sherborne and Dennis Aumiller and Elena Tommasone and Milad Alizadeh and Jingyi He and Raymond Ma and Maxime Voisin and Ellen Gilsenan-McMahon and Matthias Gallé},
journal= {arXiv preprint arXiv:2407.07565},
year = {2024}
}