Fixed case where borrowed value lives until after scope

src/test/ui/issue-46471-1.rs

@@ -0,0 +1,21 @@
+// 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 main() {
+    let y = {
+        let mut z = 0;
+        &mut z
+    };
+    //~^ ERROR `z` does not live long enough (Ast) [E0597]
+    //~| ERROR `z` does not live long enough (Mir) [E0597]
+    println!("{}", y);
+}

src/test/ui/issue-46471-1.stderr

@@ -0,0 +1,24 @@
+error[E0597]: `z` does not live long enough (Ast)
+  --> $DIR/issue-46471-1.rs:17:5
+   |
+16 |         &mut z
+   |              - borrow occurs here
+17 |     };
+   |     ^ `z` dropped here while still borrowed
+...
+21 | }
+   | - borrowed value needs to live until here
+
+error[E0597]: `z` does not live long enough (Mir)
+  --> $DIR/issue-46471-1.rs:17:6
+   |
+16 |         &mut z
+   |         ------ borrow occurs here
+17 |     };
+   |      ^ `z` dropped here while still borrowed
+...
+21 | }
+   | - borrowed value needs to live until here
+
+error: aborting due to 2 previous errors
+