Codex Finds Failure Cases in Mature Codebases
ErnestRyu · x · 2026-07-14
Agentic Bug Hunt in SymPy
The author adds that SymPy, as mathematical infrastructure, was thought to be highly "battle-tested." Yet, in this project, his UCLA PhD students Xinjie and Hyunsik used Codex + GPT-5.6 to find many "very simple" failure cases within it.
This reinforces a key signal: even for mature, core open-source projects, coding agents can serve as highly effective tools for real code auditing and bug discovery.
Related event: Codex Uncovers Subtle Correctness Bugs in SymPy(3 posts)→
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