#![feature(assert_matches)]
#![feature(box_patterns)]
#![feature(control_flow_enum)]
+#![feature(box_syntax)]
#![feature(in_band_lifetimes)]
#![feature(nll)]
#![feature(test)]
#![recursion_limit = "256"]
#![warn(rustc::internal)]
-#[macro_use]
-extern crate lazy_static;
#[macro_use]
extern crate tracing;