1 files changed, 16 insertions, 0 deletions
diff --git a/tests/ui/macros/macro-span-issue-116502.rs b/tests/ui/macros/macro-span-issue-116502.rs
new file mode 100644
index 00000000000..4c254289ee6
--- /dev/null
+++ b/tests/ui/macros/macro-span-issue-116502.rs
@@ -0,0 +1,16 @@
+#![allow(dead_code)]
+#![allow(unused_variables)]
+
+fn bug() {
+    macro_rules! m {
+        () => {
+            _ //~ ERROR the placeholder `_` is not allowed within types on item signatures for structs
+        };
+    }
+    struct S<T = m!()>(m!(), T)
+    where
+        T: Trait<m!()>;
+}
+trait Trait<T> {}
+
+fn main() {}