From 50299c6491ade2dab9f2ccf1edd6ac9123f0697d Mon Sep 17 00:00:00 2001
From: gaurikholkar <f2013002@goa.bits-pilani.ac.in>
Date: Sun, 11 Mar 2018 00:25:23 +0530
Subject: [PATCH] add ui test for E0594

---
 src/test/ui/nll/issue-47388.rs     | 20 ++++++++++++++++++++
 src/test/ui/nll/issue-47388.stderr | 11 +++++++++++
 2 files changed, 31 insertions(+)
 create mode 100644 src/test/ui/nll/issue-47388.rs
 create mode 100644 src/test/ui/nll/issue-47388.stderr

diff --git a/src/test/ui/nll/issue-47388.rs b/src/test/ui/nll/issue-47388.rs
new file mode 100644
index 000000000000..683eec8f1bbd
--- /dev/null
+++ b/src/test/ui/nll/issue-47388.rs
@@ -0,0 +1,20 @@
+// Copyright 2018 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)]
+struct FancyNum {
+    num: u8,
+}
+
+fn main() {
+    let mut fancy = FancyNum{ num: 5 };
+    let fancy_ref = &(&mut fancy);
+    fancy_ref.num = 6;
+    println!("{}", fancy_ref.num);
+}
\ No newline at end of file
diff --git a/src/test/ui/nll/issue-47388.stderr b/src/test/ui/nll/issue-47388.stderr
new file mode 100644
index 000000000000..331836bebbaa
--- /dev/null
+++ b/src/test/ui/nll/issue-47388.stderr
@@ -0,0 +1,11 @@
+error[E0594]: cannot assign through `&`-reference `fancy_ref`
+  --> $DIR/issue-47388.rs:18:5
+   |
+LL |     let fancy_ref = &(&mut fancy);
+   |                     ------------- help: consider changing this to be a mutable reference: `&mut`
+LL |     fancy_ref.num = 6;
+   |     ^^^^^^^^^^^^^^^^^ cannot assign through `&`-reference
+
+error: aborting due to previous error
+
+If you want more information on this error, try using "rustc --explain E0594"