1 files changed, 7 insertions, 0 deletions
diff --git a/src/test/ui/feature-gates/feature-gate-concat_idents3.rs b/src/test/ui/feature-gates/feature-gate-concat_idents3.rs
new file mode 100644
index 000000000..81710fd9f
--- /dev/null
+++ b/src/test/ui/feature-gates/feature-gate-concat_idents3.rs
@@ -0,0 +1,7 @@
+const XY_1: i32 = 10;
+
+fn main() {
+    const XY_2: i32 = 20;
+    assert_eq!(10, concat_idents!(X, Y_1)); //~ ERROR `concat_idents` is not stable
+    assert_eq!(20, concat_idents!(X, Y_2)); //~ ERROR `concat_idents` is not stable
+}