The Fifth Element: Using Quarkslab's cryptographic test suite to find bugs in the reference implementation of HQC, the latest algorithm added to the NIST PQC standard.

Here Célian Glénaz, Dahmun Goudarzi and Julio Loayza Meneses tell you how they did it:

https://blog.quarkslab.com/finding-bugs-in-implementations-of-hqc-the-fifth-post-quantum-standard.html