I want this at the programming language level too. If a function call can fail, I want to set a flag and have it (randomly?) fail. I hacked my way around this b

I want this at the programming language level too. If a function call can fail, I want to set a flag and have it (randomly?) fail. I hacked my way around this by adding in some wrapper that would if random, err for a bunch of critical functions. It was great for working through a ton of race conditions in golang with channels, and remote connections, etc. But hacking it in manually was annoying and not something I'd want to commit.