cbindgen makes serde panic on "proc-macro derive"

[ralfbiedert]

Overview:

As summarized by @dtolnay:

Thanks! It looks like cbindgen currently disallows using any newer version of serde_derive than one from 9 months ago (which was before crate visibility was supported) because their Cargo.toml contains:

serde_derive = "=1.0.21"

I am closing this issue because this is something you would need to sort out with the cbindgen folks. If there is anything Serde can do to unblock cbindgen in using our new releases then we can follow up about that.

Which causes compilations errors like

error: proc-macro derive panicked
 --> src/main.rs:9:30
  |
9 | #[derive(Debug, Clone, Copy, Serialize)]
  |                              ^^^^^^^^^
  |
  = help: message: called `Result::unwrap()` on an `Err` value: "failed to parse derive input: \"#[repr(C)]\\npub struct Matrix4f32 {\\n    crate data: [f32; 16],\\n}\""

Issue details are in Serde #1357

Link to repository that reproduces problem.

[eqrion]

I'm going to mark this a duplicate of #203. This is a known, unfortunate, issue.