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-rw-r--r--src/test/ui/layout/unsafe-cell-hides-niche.rs4
1 files changed, 3 insertions, 1 deletions
diff --git a/src/test/ui/layout/unsafe-cell-hides-niche.rs b/src/test/ui/layout/unsafe-cell-hides-niche.rs
index 7fb55d8219e..21ff0cb1e55 100644
--- a/src/test/ui/layout/unsafe-cell-hides-niche.rs
+++ b/src/test/ui/layout/unsafe-cell-hides-niche.rs
@@ -18,10 +18,12 @@ struct Transparent<T>(T);
 
 struct NoNiche<T>(UnsafeCell<T>);
 
+struct Size<const S: usize>;
+
 // Overwriting the runtime assertion and making it a compile-time assertion
 macro_rules! assert_size {
     ($a:ty, $b:literal) => {{
-        const _: () = assert!(std::mem::size_of::<$a>() == $b);
+        const _: Size::<$b> = Size::<{std::mem::size_of::<$a>()}>;
     }};
 }