Ensure --output-dir always exists (#891)
#1736
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|---|---|
| 11m 11s | |
| 11m 17s | |
| 11m 26s | |
| 10m 3s | |
| 10m 46s | |
| 41m 3s | |
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| 29m 45s | |
| 27m 0s | |
| 30m 57s | |
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| 12m 26s | |
| 0s | |
| 7m 5s | |
| 15m 19s | |
| 5h 22m 22s |