@SwayamInSync it doesn't seem like too many UBSan warnings and I think they're all inside of the quaddtype implementation. I'd probably just fix them.

Right, there were some from NumPy as well, this job only grep onquaddtype/ pattern and set the failure flag accordingly.

Sure, I'll look over them and resolve

The NumPy ones we can add suppressions for. Or fix them in NumPy 😀.

This describes how to use suppression files for TSan, it's the same for the other sanitizers:https://py-free-threading.github.io/thread_sanitizer/#tsan-suppressions