checker: disallow expr is Type if expr is Optional
#4448
| Job | Run time |
|---|---|
| 1m 51s | |
| 1m 32s | |
| 3m 23s |
expr is Type if expr is Optional
#4448
| Job | Run time |
|---|---|
| 1m 51s | |
| 1m 32s | |
| 3m 23s |