Added test for #46471

Author: davidtwco

src/test/ui/issue-46471.rs

@@ -0,0 +1,20 @@
+// Copyright 2016 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.
+
+// compile-flags: -Z emit-end-regions -Z borrowck=compare
+
+fn foo() -> &'static u32 {
+    let x = 0;
+    &x
+    //~^ ERROR `x` does not live long enough (Ast) [E0597]
+    //~| ERROR `x` does not live long enough (Mir) [E0597]
+}
+
+fn main() { }

src/test/ui/issue-46471.stderr

@@ -0,0 +1,24 @@
+error[E0597]: `x` does not live long enough (Ast)
+  --> $DIR/issue-46471.rs:15:6
+   |
+15 |     &x
+   |      ^ does not live long enough
+...
+18 | }
+   | - borrowed value only lives until here
+   |
+   = note: borrowed value must be valid for the static lifetime...
+
+error[E0597]: `x` does not live long enough (Mir)
+  --> $DIR/issue-46471.rs:15:5
+   |
+15 |     &x
+   |     ^^ does not live long enough
+...
+18 | }
+   |  - borrowed value only lives until here
+   |
+   = note: borrowed value must be valid for the static lifetime...
+
+error: aborting due to 2 previous errors
+