1 files changed, 15 insertions, 0 deletions
diff --git a/tests/ui/autoref-autoderef/autoderef-method-on-trait.rs b/tests/ui/autoref-autoderef/autoderef-method-on-trait.rs
new file mode 100644
index 00000000000..af747cc76e9
--- /dev/null
+++ b/tests/ui/autoref-autoderef/autoderef-method-on-trait.rs
@@ -0,0 +1,15 @@
+// run-pass
+#![allow(non_camel_case_types)]
+
+trait double {
+    fn double(self: Box<Self>) -> usize;
+}
+
+impl double for usize {
+    fn double(self: Box<usize>) -> usize { *self * 2 }
+}
+
+pub fn main() {
+    let x: Box<_> = Box::new(Box::new(3usize) as Box<dyn double>);
+    assert_eq!(x.double(), 6);
+}