test: Add testcase for rust-lang#16745

Author: richo

src/test/run-pass/issue-16745.rs

@@ -0,0 +1,19 @@
+// Copyright 2014 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.
+
+fn main() {
+    const X: u8 = 0;
+    match 0u8 {
+        X => { },
+        b'\t' => { },
+        1u8 => { },
+        _ => { },
+    }
+}