Error with `.expect()` instead off `.unwrap()` where code should indeed panic

[DanGould]

There are a few spots in the scheduler.rs where the code should indeed panic. .expect() instead of .unwrap() to document why

on handle.await and pjs.lock() and iter.next().unwrap(); // we assume there is at least 1.

[Arowolokehinde]

Hi @DanGould
is this issue still active?
can i work on it?