diff-tree: fix crash when used with --remerge-diff #20837
| Job | Run time |
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| 0s | |
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| 1m 41s | |
| 0s | |
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| 4m 9s | |
| 3m 17s | |
| 28m 5s | |
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| 9m 30s | |
| 10m 46s | |
| 9m 32s | |
| 9m 9s | |
| 25m 6s | |
| 28m 44s | |
| 0s | |
| 2h 39m 56s |
| Job | Run time |
|---|---|
| 5s | |
| 0s | |
| 3m 13s | |
| 7m 41s | |
| 6m 56s | |
| 1m 41s | |
| 0s | |
| 3m 17s | |
| 4m 9s | |
| 3m 17s | |
| 28m 5s | |
| 8m 45s | |
| 9m 30s | |
| 10m 46s | |
| 9m 32s | |
| 9m 9s | |
| 25m 6s | |
| 28m 44s | |
| 0s | |
| 2h 39m 56s |