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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 a546362414c..ee984095ad8 100644
--- a/compiler/rustc_query_system/src/lib.rs
+++ b/compiler/rustc_query_system/src/lib.rs
@@ -6,6 +6,7 @@
 #![feature(hash_raw_entry)]
 #![feature(let_chains)]
 #![feature(min_specialization)]
+#![warn(unreachable_pub)]
 // tidy-alphabetical-end
 
 pub mod cache;