I rewrote the mutation testing tool that I created for Bitcoin Core. It was originally written in Python but I got some issues that made me to rewrite it in Rust. It contains the same features as the original tool has:

- Generate mutants only for code touched in specific branches (useful for testing PRs)

- Skip useless mutants (comments, LogPrintf statements, etc.)

- One mutant per line mode for faster analysis

- Support for functional and unit test mutation

- Coverage-guided mutation testing

Check it out: https://github.com/brunoerg/bcore-mutation

We successfully migrated corecheck to use this new tool recently.

New bugs/inconsistencies found by bitcoinfuzz: panic when parsing a PSBT on btcd, core lightning not validating pub keys in routing hints, overflow on lnd, and more…

Check the complete list in the README: https://github.com/bitcoinfuzz/bitcoinfuzz

Just shilled this PR to the Floresta guys, interesting one!

https://bitcoincore.reviews/32317

Maaaaaany advancements on bitcoinfuzz during these last months, I should write a blog post about it.

People should study more about the fork button on GH and the git cherry-pick command

I spent some time rewriting bitcoinfuzz recently, it's better modularized and organized (note that v2 branch is the main one now). Also, I added a target for descriptor parse and here is one of the first finds:

https://github.com/brunoerg/bitcoinfuzz/issues/70

Happy that my paper "Software testing for peer-to-peer systems: Challenges and the state-of-the-art" was accepted for publication at Journal of Software Engineering Research and Development. It took me a lot of time, but was worth it! excited to share the findings!

Mullvad is really great, but I’m not using it to access X from 🇧🇷, ok gov??