Caroline Lemieux

@cestlemieux.bsky.social

now: Assistant Professing™ in Software Practices Lab at UBC. was: postdoc MSR NYC, phd UC Berkeley. also at https://mastodon.acm.org/@cestlemieux. she/her.

SPLASH/ISSTA will be held jointly in Oakland, California, this October. The deadline for the doctoral symposium is coming up: July 3rd. The doctoral symposium is intended as a venue for mid-stage PhD students to get feedback on their work. Learn more at: conf.researchr.org/track/splash...

SPLASH/ISSTA 2026 - Doctoral symposium - SPLASH/ISSTA 2026

SPLASH Doctoral Symposium The SPLASH Doctoral Symposium provides an interactive forum primarily aimed at mid-stage doctoral students who have progressed far enough in their research to have a structur...

conf.researchr.org

CodaMOSA was built on Pynguin version 0.18 .... since then, Pynguin has been very much improved. Pynguin version 0.41.0 includes the LLMMOSA Algorithm, which integrates core parts of CodaMOSA into modern Pynguin! Many kudos to Pynguin contributors for this. github.com/se2p/pynguin...

Release Pynguin 0.41.0 · se2p/pynguin

Fix subject_properties aren't registered when running Pynguin on an imported module Update documentation (Codestyle, Code Overview) Add LLM-Agent guidelines Add PynguinML mode: Parsing and test gen...

github.com

A common follow-up, whenever we bring up parametric generators is "but can't those byte-level mutations result in a totally different generated input?" ....they do, but our experiments found those more destructive mutations generally lead to higher coverage. Our students fully explored this in:

Rohan Padhye@rohan.padhye.org · last yr.

Just Accepted to ACM TOSEM! The "Havoc Paradox" is about the relationship between byte-level fuzzer mutations and their effect on the inputs produced by generators for structured strings (e.g. XML/SQL). Can disruptive mutations be controlled? Should they be? Find out. 📄 dl.acm.org/doi/pdf/10.1...

🧠 Older models memorize more: Models like CodeGen, and CodeLlama show significantly higher leakage on Defects4J than newer models (e.g., Llama 3.1). They often reproduce patches verbatim, to the point that it’s weird (including comments!!) 🔥 3/

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