1 files changed, 31 insertions, 0 deletions
diff --git a/tests/ui/traits/new-solver/dedup-regions.rs b/tests/ui/traits/new-solver/dedup-regions.rs
new file mode 100644
index 000000000..f376f39a5
--- /dev/null
+++ b/tests/ui/traits/new-solver/dedup-regions.rs
@@ -0,0 +1,31 @@
+// compile-flags: -Ztrait-solver=next
+// check-pass
+
+struct A(*mut ());
+
+unsafe impl Send for A where A: 'static {}
+
+macro_rules! mk {
+    ($name:ident $ty:ty) => {
+        struct $name($ty, $ty, $ty, $ty, $ty, $ty, $ty, $ty, $ty, $ty);
+    };
+}
+
+mk!(B A);
+mk!(C B);
+mk!(D C);
+mk!(E D);
+mk!(F E);
+mk!(G F);
+mk!(H G);
+mk!(I H);
+mk!(J I);
+mk!(K J);
+mk!(L K);
+mk!(M L);
+
+fn needs_send<T: Send>() {}
+
+fn main() {
+    needs_send::<M>();
+}