#![feature(crate_visibility_modifier)]
#![feature(if_let_guard)]
#![feature(label_break_value)]
-#![feature(nll)]
+#![feature(let_chains)]
#![feature(min_specialization)]
-#![recursion_limit = "256"]
+#![feature(nll)]
#![feature(slice_internals)]
+#![feature(stmt_expr_attributes)]
+#![recursion_limit = "256"]
#[macro_use]
extern crate rustc_macros;