Serde field attributes not written to TokenStream

[KodrAus]

Previously, I've piggybacked on serde_codegen_internals to get whether or not a field will be serialised, and if so, what it will be called.

With the new macros 1.1 stuff this doesn't work because the serde field attributes are being removed from the token stream output if my code runs after Serialize:

//No serde attributes for ElasticType
#[derive(Serialize, ElasticType)]
struct MyType { ... }

//All the serde attributes for ElasticType
#[derive(ElasticType, Serialize)]
struct MyType { ... }

Wouldn't this also affect attributes visible to Deserialize if you also derive Serialize first?

[sfackler]

This is intentional - the crate would fail to compile if the attributes weren't stripped since they're unknown to the compiler. It's one of the known bugs on the tracking issue for macros 1.1: rust-lang/rust#35900