clippy-driver no longer builds after <unknown PR>

[rust-highfive]

Hello, this is your friendly neighborhood mergebot.
After merging PR , I observed that the tool clippy-driver no longer builds.
A follow-up PR to the repository https://github.com/rust-lang/rust-clippy is needed to fix the fallout.

cc ghost, do you think you would have time to do the follow-up work?
If so, that would be great!

cc ghost, the PR reviewer, and rust-lang/compiler -- nominating for prioritization.

[kennytm]

(This is just a test)