Fix handling of negative timestamps in Stat.
#3775
| Job | Run time |
|---|---|
| 3m 5s | |
| 54s | |
| 22s | |
| 6m 0s | |
| 5m 58s | |
| 5s | |
| 11m 40s | |
| 1m 1s | |
| 42s | |
| 41s | |
| 51s | |
| 1m 2s | |
| 1m 28s | |
| 1m 12s | |
| 1m 21s | |
| 1m 21s | |
| 1m 12s | |
| 59s | |
| 1m 40s | |
| 1m 24s | |
| 1m 21s | |
| 1m 14s | |
| 45s | |
| 1m 8s | |
| 57s | |
| 1m 11s | |
| 1m 8s | |
| 56s | |
| 58s | |
| 2m 52s | |
| 3m 12s | |
| 3m 20s | |
| 3m 36s | |
| 3m 45s | |
| 3m 11s | |
| 2m 56s | |
| 21m 24s | |
| 1m 6s | |
| 46s | |
| 1m 0s | |
| 40s | |
| 1h 40m 24s |