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-rw-r--r--compiler/rustc_interface/src/lib.rs4
1 files changed, 3 insertions, 1 deletions
diff --git a/compiler/rustc_interface/src/lib.rs b/compiler/rustc_interface/src/lib.rs
index 258e38c3bdb..a41a749ee68 100644
--- a/compiler/rustc_interface/src/lib.rs
+++ b/compiler/rustc_interface/src/lib.rs
@@ -1,5 +1,4 @@
 #![feature(box_patterns)]
-#![feature(let_else)]
 #![feature(internal_output_capture)]
 #![feature(thread_spawn_unchecked)]
 #![feature(once_cell)]
@@ -8,6 +7,9 @@
 #![deny(rustc::untranslatable_diagnostic)]
 #![deny(rustc::diagnostic_outside_of_impl)]
 
+#[macro_use]
+extern crate tracing;
+
 mod callbacks;
 mod errors;
 pub mod interface;