Rollup merge of rust-lang#27158 - apasel422:issue-14382, r=alexcrichton

closes rust-lang#14382

Author: steveklabnik

src/test/run-pass/issue-14382.rs

@@ -0,0 +1,24 @@
+// Copyright 2015 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.
+
+#[derive(Debug)]
+struct Matrix4<S>(S);
+trait POrd<S> {}
+
+fn translate<S: POrd<S>>(s: S) -> Matrix4<S> { Matrix4(s) }
+
+impl POrd<f32> for f32 {}
+impl POrd<f64> for f64 {}
+
+fn main() {
+    let x = 1.0;
+    let m : Matrix4<f32> = translate(x);
+    println!("m: {:?}", m);
+}