Fix handling of negative timestamps in Stat.
#3774
| Job | Run time |
|---|---|
| 3m 7s | |
| 55s | |
| 2m 16s | |
| 17s | |
| 2m 22s | |
| 10s | |
| 2m 32s | |
| 1m 2s | |
| 43s | |
| 43s | |
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| 31s | |
| 1m 10s | |
| 49s | |
| 1m 10s | |
| 50s | |
| 1m 5s | |
| 50s | |
| 1m 11s | |
| 35s | |
| 1m 9s | |
| 1m 24s | |
| 34s | |
| 52s | |
| 1m 16s | |
| 1m 33s | |
| 57s | |
| 1m 28s | |
| 1m 6s | |
| 2m 58s | |
| 3m 1s | |
| 3m 5s | |
| 3m 24s | |
| 3m 8s | |
| 3m 32s | |
| 3m 15s | |
| 19m 56s | |
| 1m 20s | |
| 45s | |
| 1m 21s | |
| 46s | |
| 1h 19m 50s |