#![allow(non_camel_case_types)]
-#![feature(match_default_bindings)]
+#![feature(from_ref)]
+#![cfg_attr(stage0, feature(match_default_bindings))]
#![feature(quote)]
#[macro_use] extern crate log;
extern crate syntax;
extern crate syntax_pos;
extern crate rustc_errors as errors;
-extern crate rustc_back;
+extern crate rustc_data_structures;
// for "clarity", rename the graphviz crate to dot; graphviz within `borrowck`
// refers to the borrowck-specific graphviz adapter traits.