rustc stack overflow when invoking Serialize_tuple or Deserialize_tuple

[ericseppanen]

I tried out serde_tuple for the first time, and every time I try to use it I get a rustc stack overflow.

I get this even if I create an empty project with one test and one struct:

#[cfg(test)]
mod tests {
    use serde_tuple::{Serialize_tuple};

    #[test]
    fn basic() {
        #[derive(Serialize_tuple)]
        pub struct Basic {
            name: u32,
        }

        let _x = Basic {
            name: 123
        };
    }
}

I get:

$ cargo check --tests
    Updating crates.io index
   Compiling proc-macro2 v1.0.19
   Compiling unicode-xid v0.2.1
   Compiling syn v1.0.38
   Compiling serde_derive v1.0.114
   Compiling serde v1.0.114
   Compiling quote v1.0.7
   Compiling serde_tuple_macros v0.5.0
    Checking serde_tuple v0.5.0
    Checking serde_tuple_playground v0.1.0 (/home/eric/work/rust/serde_tuple_playground)

thread 'rustc' has overflowed its stack
fatal runtime error: stack overflow
error: could not compile `serde_tuple_playground`.

Caused by:
  process didn't exit successfully: `rustc --crate-name serde_tuple_playground --edition=2018 src/lib.rs ...` (signal: 6, SIGABRT: process abort signal)

I tried a few different stable and nightly releases of the compiler; I've tried the last few releases on serde_tuple as well. All fail the same way. This is on Linux x86_64.

[ericseppanen]

I found the workaround here.

Adding the placeholder code fixes it for me:

#[derive(serde_derive::Deserialize)]
struct Empty {}