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PR2Trigger: From Concurrency-Fix PR Diffs to Executable Triggering Tests for Go

Risheng Wei Yu-Heng Shen Yi-Ming Ye Yu-Chen Yan Yihao Peng Hao Xi Yue Chen Hai Wan Xi-Bin Zhao

Oct 2026 · Proceedings of the 41st IEEE/ACM International Conference on Automated Software Engineering · 0 citations · 23 references

Abstract

Public PRs and CVE advisories are valuable sources for Go concurrency-bug research, but rarely provide executable benchmark samples because historical projects are difficult to rebuild and many fixes lack reusable triggering tests. We present PR2Trigger, a semi-automated pipeline that reconstructs PR-localized triggering tests from fix-PR diffs. To address historical build difficulty, PR2Trigger extracts a self-contained package of PR-modified symbols and their in-project dependencies, and executes it in a pinned Docker environment. To address missing triggering tests, PR2Trigger uses a large language model to synthesize support code and a concurrency-driving test entry, while deterministic scripts handle execution, failure detection, and localization matching. On 100 Go race-fix candidate PRs, PR2Trigger improves the gate-passing rate from 2% to 15%, a 7.5× improvement over developer-supplied tests.

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