1 files changed, 10 insertions, 0 deletions
diff --git a/src/test/ui/impl-trait/issue-86465.rs b/src/test/ui/impl-trait/issue-86465.rs
new file mode 100644
index 000000000..a79bb6474
--- /dev/null
+++ b/src/test/ui/impl-trait/issue-86465.rs
@@ -0,0 +1,10 @@
+#![feature(type_alias_impl_trait)]
+
+type X<'a, 'b> = impl std::fmt::Debug;
+
+fn f<'t, 'u>(a: &'t u32, b: &'u u32) -> (X<'t, 'u>, X<'u, 't>) {
+    (a, a)
+    //~^ ERROR concrete type differs from previous defining opaque type use
+}
+
+fn main() {}