Fix KeyError for already popped tasks
#629
| Job | Run time |
|---|---|
| 8m 55s | |
| 10m 19s | |
| 10m 57s | |
| 9m 17s | |
| 10m 48s | |
| 11m 38s | |
| 7m 58s | |
| 10m 49s | |
| 11m 32s | |
| 7m 44s | |
| 10m 20s | |
| 10m 46s | |
| 7m 56s | |
| 10m 45s | |
| 11m 19s | |
| 2h 31m 3s |