| Value | Meaning |
|---|---|
| preStart | Just about to invoke the fiber which starts execution |
| postStart | After the fiber has returned for the first time (by yield or exit) |
| start | Just about to start execution |
| yield | Temporarily paused |
| resume | Resumed from a prior yield |
| end | Ended normally |
| fail | Ended with an exception |
High level state change events for a Task