[build] clippy doesn't run in some integration tests

[tesuji]

Some integration tests use virtual workspace will not be tested by clippy:

Error from integration test of future-rs:

$ cargo clippy --all-targets --all-features -- --cap-lints warn -W clippy::pedantic -W clippy::nursery
error: --all-features is not allowed in the root of a virtual workspace

What should we do with it?

1. Drop the --all-features flag?
2. Specify a MANIFEST_PATH env for each crate has virtual workspace and pass it to each cargo clippy invocation?

[tesuji]

Seems like the issue was resolved in cargo: rust-lang/cargo#7525
Wait for the rust PR to merge: rust-lang/rust#65710

[phansch]

Regardless of the cargo PR, we should make sure the integration tests fail if something like that happens.

[tesuji]

How do we check if similar issues happen?

[tesuji]

rust-lang/rust#65710 merged. Closing this issue.