Added test for #46983

Author: davidtwco

src/test/ui/issue-46983.rs

@@ -0,0 +1,18 @@
+// Copyright 2017 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![feature(nll)]
+
+fn foo(x: &u32) -> &'static u32 {
+    &*x
+    //~^ ERROR explicit lifetime required in the type of `x` [E0621]
+}
+
+fn main() {}

src/test/ui/issue-46983.stderr

@@ -0,0 +1,10 @@
+error[E0621]: explicit lifetime required in the type of `x`
+  --> $DIR/issue-46983.rs:14:5
+   |
+13 | fn foo(x: &u32) -> &'static u32 {
+   |        - consider changing the type of `x` to `&'static u32`
+14 |     &*x
+   |     ^^^ lifetime `'static` required
+
+error: aborting due to previous error
+