#![doc(html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/")]
#![feature(drain_filter)]
-#![feature(backtrace)]
#![feature(if_let_guard)]
#![cfg_attr(bootstrap, feature(let_chains))]
+#![feature(adt_const_params)]
#![feature(let_else)]
#![feature(never_type)]
-#![feature(adt_const_params)]
+#![feature(result_option_inspect)]
#![feature(rustc_attrs)]
#![allow(incomplete_features)]
#![allow(rustc::potential_query_instability)]