1 files changed, 21 insertions, 0 deletions
diff --git a/src/test/ui/type-alias-impl-trait/auto-trait-leakage3.rs b/src/test/ui/type-alias-impl-trait/auto-trait-leakage3.rs
new file mode 100644
index 000000000..5fb7a9473
--- /dev/null
+++ b/src/test/ui/type-alias-impl-trait/auto-trait-leakage3.rs
@@ -0,0 +1,21 @@
+#![feature(type_alias_impl_trait)]
+#![allow(dead_code)]
+
+// FIXME This should compile, but it currently doesn't
+
+mod m {
+    type Foo = impl std::fmt::Debug;
+    //~^ ERROR: cycle detected when computing type of `m::Foo::{opaque#0}` [E0391]
+
+    pub fn foo() -> Foo {
+        22_u32
+    }
+
+    pub fn bar() {
+        is_send(foo());
+    }
+
+    fn is_send<T: Send>(_: T) {}
+}
+
+fn main() {}