rust/tests/ui/feature-gates/feature-gate-rustc_encodable_decodable.rs

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#![crate_type = "lib"]
// This isn't intended to compile, so it's easiest to just ignore this error.
extern crate rustc_serialize; //~ERROR can't find crate for `rustc_serialize`
#[derive(
RustcEncodable,
//~^ ERROR use of unstable library feature 'rustc_encodable_decodable'
//~^^ WARNING this was previously accepted by the compiler
//~^^^ WARNING use of deprecated macro `RustcEncodable`
RustcDecodable,
//~^ ERROR use of unstable library feature 'rustc_encodable_decodable'
//~^^ WARNING this was previously accepted by the compiler
//~^^^ WARNING use of deprecated macro `RustcDecodable`
)]
struct S;