Function try_get_current_task 

pub fn try_get_current_task() -> Option<TaskId>

Gets the TaskId of the current task, or None if there is no current task.

Unlike get_current_task, this never panics, so it is meant for code that can run anywhere, such as Drop handlers and tracing subscribers. It returns None outside of a Shuttle execution, and whenever Shuttle is updating its own state, even while a task is running. That includes the code that Shuttle runs from there: tracing subscribers handling some of Shuttle’s own events, ChildLabelFns, and the destructors of labels and tags. Between steps, while Shuttle picks the next task to run, it returns the task that ran last. While Shuttle tears an execution down, it returns the task being torn down, and the main thread’s while Shuttle drops statics.