1 files changed, 24 insertions, 0 deletions
diff --git a/src/test/ui/never_type/impl_trait_fallback4.rs b/src/test/ui/never_type/impl_trait_fallback4.rs
new file mode 100644
index 000000000..fe62773fa
--- /dev/null
+++ b/src/test/ui/never_type/impl_trait_fallback4.rs
@@ -0,0 +1,24 @@
+#![feature(type_alias_impl_trait)]
+
+trait T {
+    type Assoc: Cake;
+}
+
+trait Cake: std::fmt::Display {
+    fn cake() -> Self;
+}
+
+type Foo = impl T;
+
+fn foo() -> impl T {
+    //~^ ERROR `(): T` is not satisfied
+    panic!()
+}
+
+fn a() -> Foo {
+    foo()
+}
+
+fn main() {
+    println!("{}", <Foo as T>::Assoc::cake());
+}