1 files changed, 13 insertions, 0 deletions
diff --git a/src/test/ui/span/macro-span-replacement.rs b/src/test/ui/span/macro-span-replacement.rs
new file mode 100644
index 000000000..66973c58d
--- /dev/null
+++ b/src/test/ui/span/macro-span-replacement.rs
@@ -0,0 +1,13 @@
+// check-pass
+
+#![warn(unused)]
+
+macro_rules! m {
+    ($a:tt $b:tt) => {
+        $b $a; //~ WARN struct `S` is never constructed
+    }
+}
+
+fn main() {
+    m!(S struct);
+}