1 files changed, 14 insertions, 0 deletions
diff --git a/src/test/ui/consts/auxiliary/external_macro.rs b/src/test/ui/consts/auxiliary/external_macro.rs
new file mode 100644
index 000000000..d260634c9
--- /dev/null
+++ b/src/test/ui/consts/auxiliary/external_macro.rs
@@ -0,0 +1,14 @@
+#![feature(allow_internal_unstable)]
+
+// Macro to help ensure CONST_ERR lint errors
+// are not silenced in external macros.
+// https://github.com/rust-lang/rust/issues/65300
+
+#[macro_export]
+#[allow_internal_unstable(type_ascription)]
+macro_rules! static_assert {
+    ($test:expr) => {
+        #[allow(dead_code)]
+        const _: () = [()][!($test: bool) as usize];
+    }
+}