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-rw-r--r--compiler/rustc_query_system/src/lib.rs1
1 files changed, 1 insertions, 0 deletions
diff --git a/compiler/rustc_query_system/src/lib.rs b/compiler/rustc_query_system/src/lib.rs
index 1b992cdb0c9..b1295ba48cc 100644
--- a/compiler/rustc_query_system/src/lib.rs
+++ b/compiler/rustc_query_system/src/lib.rs
@@ -6,6 +6,7 @@
 #![feature(let_else)]
 #![feature(min_specialization)]
 #![feature(thread_local_const_init)]
+#![feature(extern_types)]
 
 #[macro_use]
 extern crate tracing;