checker: fix missing option variable checking when casting using as operator
#3951
| Job | Run time |
|---|---|
| 5m 15s | |
| 17m 32s | |
| 22m 47s |
as operator
#3951
| Job | Run time |
|---|---|
| 5m 15s | |
| 17m 32s | |
| 22m 47s |