error[E0602]: unknown lint: `foo_qux`
   |
   = note: requested on the command line with `--force-warn foo_qux`

error[E0602]: unknown lint: `foo_qux`
   |
   = note: requested on the command line with `--force-warn foo_qux`

error: aborting due to 2 previous errors

For more information about this error, try `rustc --explain E0602`.