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.
Reposted by Caroline Lemieux
Curious about graduate programs at UBC Computer Science? Join our virtual Q&A sessions about admissions to our MSc, PhD-track and PhD program on Wed Dec 3! Register here: www.cs.ubc.ca/graduate-pro...
November 7, 2025 at 12:08 AM
Curious about graduate programs at UBC Computer Science? Join our virtual Q&A sessions about admissions to our MSc, PhD-track and PhD program on Wed Dec 3! Register here: www.cs.ubc.ca/graduate-pro...
I am extremely honoured to be appointed as a new Canada Research Chair, joining many esteemed colleagues at UBC and in the country at large!
Congratulations to the five UBC Science researchers announced as new Canada Research Chairs, Drs. Caroline Lemieux, Eva Nichols, Julie Prytulak, Chiara Saffirio and Xin Tang.
@cs.ubc.ca @chem.ubc.ca @ubcmath.bsky.social
science.ubc.ca/news/2025-10...
@cs.ubc.ca @chem.ubc.ca @ubcmath.bsky.social
science.ubc.ca/news/2025-10...
New CRCs include focus on software, AI-driven health research
New CRCs focus on software security, electrocatalysts for carbon recycling, isotope geochemistry, quantum systems, and AI-driven celluar health studies.
science.ubc.ca
October 23, 2025 at 10:28 PM
I am extremely honoured to be appointed as a new Canada Research Chair, joining many esteemed colleagues at UBC and in the country at large!
We are recruiting for two assistant professor positions, with priority areas in: visualization; robotics & reinforcement learning; data mangagement & data mining. Applications due December 10th! See more at the link below.
UBC Computer Science invites applications for up to two full-time tenure-track positions with the following priority areas: visualization, robotics, reinforcement learning, data management, and data mining. Applications are due Wed Dec 10, 2025. Learn more: www.cs.ubc.ca/our-departme...
October 23, 2025 at 10:26 PM
We are recruiting for two assistant professor positions, with priority areas in: visualization; robotics & reinforcement learning; data mangagement & data mining. Applications due December 10th! See more at the link below.
The UBC Software Practices Lab is heading to #icfpsplash25! 4 ICFP/OOPSLA talks, 1 SPLASH-E, 5 talks at associated workshops... check it out: www.cs.ubc.ca/news/2025/10...
UBC Computer Science makes waves at programming language conference ICFP/SPLASH
www.cs.ubc.ca
October 10, 2025 at 6:37 PM
The UBC Software Practices Lab is heading to #icfpsplash25! 4 ICFP/OOPSLA talks, 1 SPLASH-E, 5 talks at associated workshops... check it out: www.cs.ubc.ca/news/2025/10...
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
June 25, 2025 at 6:50 PM
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...
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:
....they do, but our experiments found those more destructive mutations generally lead to higher coverage. Our students fully explored this in:
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...
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...
June 9, 2025 at 9:52 PM
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:
....they do, but our experiments found those more destructive mutations generally lead to higher coverage. Our students fully explored this in:
after years of fuzzing libxml2 I am happy to announce I have now actually used xmllint
June 4, 2025 at 11:07 PM
after years of fuzzing libxml2 I am happy to announce I have now actually used xmllint
I was today days old when I learned that IEEETran format has special figure captions overwritten by \usepackage{subcaption}; instead one should use \usepackage[caption=false]{subfig}. tex.stackexchange.com/questions/30...
May 27, 2025 at 12:21 AM
I was today days old when I learned that IEEETran format has special figure captions overwritten by \usepackage{subcaption}; instead one should use \usepackage[caption=false]{subfig}. tex.stackexchange.com/questions/30...
Back from #ICSE25! I'm looking forward to reading "No Harness, No Problem: Oracle-guided Harnessing for Auto-generating C API Fuzzing Harnesses", by @gabriel-sherman.bsky.social and @snagycs.bsky.social.(users.cs.utah.edu/~snagy/paper...). Nice progress in fuzz driver generation!
May 5, 2025 at 7:27 PM
Back from #ICSE25! I'm looking forward to reading "No Harness, No Problem: Oracle-guided Harnessing for Auto-generating C API Fuzzing Harnesses", by @gabriel-sherman.bsky.social and @snagycs.bsky.social.(users.cs.utah.edu/~snagy/paper...). Nice progress in fuzz driver generation!
Finally added a little logo for QuAC (our attribute-based python type inference tool, paper: doi.org/10.1145/3689... + repo: github.com/jifengwu2k/q...) to my website :).
April 4, 2025 at 10:23 PM
Finally added a little logo for QuAC (our attribute-based python type inference tool, paper: doi.org/10.1145/3689... + repo: github.com/jifengwu2k/q...) to my website :).
There's still time to submit to FUZZING'25! This year, we're accepting both the (now classic) registered reports _and_ new short papers (fuzzing nuggets). Deadline is now March 26th! fuzzingworkshop.github.io
FUZZING'25 Workshop @ ISSTA
The 4th International Fuzzing Workshop (FUZZING) 2025 welcomes all researchers,
scientists, engineers and practitioners to present their latest research findings,
empirical analyses, t...
fuzzingworkshop.github.io
March 21, 2025 at 10:09 PM
There's still time to submit to FUZZING'25! This year, we're accepting both the (now classic) registered reports _and_ new short papers (fuzzing nuggets). Deadline is now March 26th! fuzzingworkshop.github.io
Reposted by Caroline Lemieux
🧠 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/
November 26, 2024 at 4:09 PM
🧠 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/