1 files changed, 27 insertions, 0 deletions
diff --git a/src/test/ui/unsized-locals/unsized-index.rs b/src/test/ui/unsized-locals/unsized-index.rs
new file mode 100644
index 000000000..e8782e894
--- /dev/null
+++ b/src/test/ui/unsized-locals/unsized-index.rs
@@ -0,0 +1,27 @@
+// run-pass
+
+#![feature(unsized_fn_params)]
+
+use std::ops;
+use std::ops::Index;
+
+pub struct A;
+
+impl ops::Index<str> for A {
+    type Output = ();
+    fn index(&self, _: str) -> &Self::Output {
+        &()
+    }
+}
+
+impl ops::IndexMut<str> for A {
+    fn index_mut(&mut self, _: str) -> &mut Self::Output {
+        panic!()
+    }
+}
+
+fn main() {
+    let a = A {};
+    let s = String::new().into_boxed_str();
+    assert_eq!(&(), a.index(*s));
+}