From 46e935d6be09a9444f968f81cce825dbef34dd9b Mon Sep 17 00:00:00 2001
From: Simon Sapin <simon.sapin@exyr.org>
Date: Wed, 27 May 2015 00:04:41 +0200
Subject: [PATCH] Add a test for #[repr] as used in arrayvec

---
 src/test/run-pass/enum-discrim-manual-sizing-2.rs | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/src/test/run-pass/enum-discrim-manual-sizing-2.rs b/src/test/run-pass/enum-discrim-manual-sizing-2.rs
index e10bd55fe9dfc..0c0c686e9da19 100644
--- a/src/test/run-pass/enum-discrim-manual-sizing-2.rs
+++ b/src/test/run-pass/enum-discrim-manual-sizing-2.rs
@@ -11,7 +11,7 @@
 // Test that explicit discriminant sizing inhibits the non-nullable pointer
 // optimization in enum layout.
 
-use std::mem::size_of;
+use std::mem::{size_of, zeroed};
 
 #[repr(i8)]
 enum Ei8<T> {
@@ -103,4 +103,10 @@ pub fn main() {
     assert!(size_of::<Euint<&i32>>() > size_of::<usize>());
 
     assert!(size_of::<EC<&i32>>() > size_of::<EC<()>>());
+
+    let zero: &i32 = unsafe { zeroed() };
+    assert!(match Eu8::_Some(zero) {
+        Eu8::_Some(_) => true,
+        Eu8::_None => false,
+    });
 }