1 files changed, 29 insertions, 0 deletions
diff --git a/src/test/ui/feature-gates/feature-gate-arbitrary-self-types.rs b/src/test/ui/feature-gates/feature-gate-arbitrary-self-types.rs
new file mode 100644
index 000000000..47ca7e349
--- /dev/null
+++ b/src/test/ui/feature-gates/feature-gate-arbitrary-self-types.rs
@@ -0,0 +1,29 @@
+use std::{
+    ops::Deref,
+};
+
+struct Ptr<T: ?Sized>(Box<T>);
+
+impl<T: ?Sized> Deref for Ptr<T> {
+    type Target = T;
+
+    fn deref(&self) -> &T {
+        &*self.0
+    }
+}
+
+trait Foo {
+    fn foo(self: Ptr<Self>); //~ ERROR `Ptr<Self>` cannot be used as the type of `self` without
+}
+
+struct Bar;
+
+impl Foo for Bar {
+    fn foo(self: Ptr<Self>) {} //~ ERROR `Ptr<Bar>` cannot be used as the type of `self` without
+}
+
+impl Bar {
+    fn bar(self: Box<Ptr<Self>>) {} //~ ERROR `Box<Ptr<Bar>>` cannot be used as the
+}
+
+fn main() {}