Move remaining undef use in OS extensions to prepend
#30619
| Job | Run time |
|---|---|
| 42s | |
| 2m 24s | |
| 4m 28s | |
| 6m 9s | |
| 1m 41s | |
| 5m 2s | |
| 3m 43s | |
| 21s | |
| 2m 56s | |
| 3m 24s | |
| 25s | |
| 42s | |
| 3m 18s | |
| 1m 20s | |
| 4m 3s | |
| 7m 43s | |
| 5m 0s | |
| 53m 21s |