1 files changed, 27 insertions, 0 deletions
diff --git a/tests/ui/traits/inheritance/subst.rs b/tests/ui/traits/inheritance/subst.rs
new file mode 100644
index 00000000000..b2b6503666e
--- /dev/null
+++ b/tests/ui/traits/inheritance/subst.rs
@@ -0,0 +1,27 @@
+// run-pass
+
+pub trait Add<RHS,Result> {
+    fn add(&self, rhs: &RHS) -> Result;
+}
+
+trait MyNum : Sized + Add<Self,Self> { }
+
+struct MyInt { val: isize }
+
+impl Add<MyInt, MyInt> for MyInt {
+    fn add(&self, other: &MyInt) -> MyInt { mi(self.val + other.val) }
+}
+
+impl MyNum for MyInt {}
+
+fn f<T:MyNum>(x: T, y: T) -> T {
+    return x.add(&y);
+}
+
+fn mi(v: isize) -> MyInt { MyInt { val: v } }
+
+pub fn main() {
+    let (x, y) = (mi(3), mi(5));
+    let z = f(x, y);
+    assert_eq!(z.val, 8)
+}