diff --git a/src/librustc_mir/interpret/intern.rs b/src/librustc_mir/interpret/intern.rs
index f362ea812f5f..a47cea9a70ac 100644
--- a/src/librustc_mir/interpret/intern.rs
+++ b/src/librustc_mir/interpret/intern.rs
@@ -328,7 +328,9 @@ pub fn intern_const_alloc_recursive(
             }
         } else if ecx.memory().dead_alloc_map.contains_key(&alloc_id) {
             // dangling pointer
-            return throw_err!(ValidationFailure("encountered dangling pointer in final constant".into()))
+            return throw_err!(
+                ValidationFailure("encountered dangling pointer in final constant".into())
+            )
         }
     }
     Ok(())