gh-143309: fix UAF in os.execve when the environment is concurrently mutated
#228757
| Job | Run time |
|---|---|
| 6s | |
| 5s | |
| 11s |
os.execve when the environment is concurrently mutated
#228757
| Job | Run time |
|---|---|
| 6s | |
| 5s | |
| 11s |