fix `X as !` behavior

1 files changed, 23 insertions, 0 deletions

diff --git a/src/test/compile-fail/coerce-to-bang-cast.rs b/src/test/compile-fail/coerce-to-bang-cast.rs
new file mode 100644
index 00000000000..57d2192e635
--- /dev/null
+++ b/src/test/compile-fail/coerce-to-bang-cast.rs
@@ -0,0 +1,23 @@
+// 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.
+
+#![feature(never_type)]
+
+fn foo(x: usize, y: !, z: usize) { }
+
+fn cast_a() {
+    let y = {return; 22} as !;
+}
+
+fn cast_b() {
+    let y = 22 as !; //~ ERROR non-scalar cast
+}
+
+fn main() { }