This bug didn't occur on the main branch of this repo, but on a fork which [modifications](https://github.com/dragostis/chili/compare/main...zetanumbers:chili:rustc) are relevant to integrate this runtime into rustc. There's more detailed explanation of modifications done in this PR: https://github.com/rust-lang/rust/pull/140206 However it seems like it's not my fault, so I've decided to document it here for better or worse: ``` thread '<unnamed>' panicked at ~/.cargo/git/checkouts/chili-3ea47afa4e2c4ada/7358b30/src/job.rs:247:62: called `Option::unwrap()` on a `None` value ``` EDIT: btw I'm an amateur on the heartbeat scheduling