[Servo release build] attribute must only have on argument

[novaksam]

error: attribute must only have one argument --> /Users/User/Documents/Sources/servo/.cargo/registry/src/github.com-1ecc6299db9ec823/serde_derive-0.8.19/src/lib.rs:9:3 | 9 | #[proc_macro_derive(Serialize, attributes(serde))] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

error: attribute must only have one argument --> /Users/User/Documents/Sources/servo/.cargo/registry/src/github.com-1ecc6299db9ec823/serde_derive-0.8.19/src/lib.rs:17:3 | 17 | #[proc_macro_derive(Deserialize, attributes(serde))] | ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

Just giving a heads up.

[dtolnay]

You need a newer nightly. This feature was added in rust-lang/rust#37614.

Servo avoids problems like this by locking in a version of serde_derive and a version of Rust that work together:

• https://github.com/servo/servo/blob/4dbca055c6d225e5fe5030bf2d402b73d2ea94da/Cargo.lock#L2355
• https://github.com/servo/servo/blob/4dbca055c6d225e5fe5030bf2d402b73d2ea94da/rust-nightly-date#L1