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-rw-r--r--compiler/rustc_session/src/lib.rs6
1 files changed, 5 insertions, 1 deletions
diff --git a/compiler/rustc_session/src/lib.rs b/compiler/rustc_session/src/lib.rs
index 429475c573c..39e871f532c 100644
--- a/compiler/rustc_session/src/lib.rs
+++ b/compiler/rustc_session/src/lib.rs
@@ -1,6 +1,5 @@
 #![feature(if_let_guard)]
 #![feature(let_chains)]
-#![feature(let_else)]
 #![feature(min_specialization)]
 #![feature(never_type)]
 #![feature(once_cell)]
@@ -9,11 +8,16 @@
 #![feature(map_many_mut)]
 #![recursion_limit = "256"]
 #![allow(rustc::potential_query_instability)]
+#![deny(rustc::untranslatable_diagnostic)]
+#![deny(rustc::diagnostic_outside_of_impl)]
 
 #[macro_use]
 extern crate rustc_macros;
 pub mod errors;
 
+#[macro_use]
+extern crate tracing;
+
 pub mod cgu_reuse_tracker;
 pub mod utils;
 pub use lint::{declare_lint, declare_lint_pass, declare_tool_lint, impl_lint_pass};