1 files changed, 25 insertions, 0 deletions

diff --git a/src/test/ui/issues/issue-8521.rs b/src/test/ui/issues/issue-8521.rs
new file mode 100644
index 000000000..15fbd4465
--- /dev/null
+++ b/src/test/ui/issues/issue-8521.rs
@@ -0,0 +1,25 @@
+// check-pass
+trait Foo1 {}
+
+trait A {}
+
+macro_rules! foo1(($t:path) => {
+    impl<T: $t> Foo1 for T {}
+});
+
+foo1!(A);
+
+trait Foo2 {}
+
+trait B<T> {}
+
+#[allow(unused)]
+struct C {}
+
+macro_rules! foo2(($t:path) => {
+    impl<T: $t> Foo2 for T {}
+});
+
+foo2!(B<C>);
+
+fn main() {}