tests/ui/instrument-coverage/coverage-options.bad.stderr - third_party/rust - Git at Google

 error: incorrect value `bad` for unstable option `coverage-options` - `block` | `branch` | `condition` | `mcdc` | `no-mir-spans` was expected
	error: incorrect value `bad` for unstable option `coverage-options` - `block` \| `branch` \| `condition` \| `mcdc` \| `no-mir-spans` was expected