More robust testing

src/test/compile-fail/issue-35869.rs

@@ -0,0 +1,37 @@
+// 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(conservative_impl_trait)]
+
+trait Foo {
+    fn foo(fn(u8) -> ()); //~ NOTE type in trait
+    fn bar(Option<u8>); //~ NOTE type in trait
+    fn baz((u8, u16)); //~ NOTE type in trait
+    fn qux() -> u8; //~ NOTE type in trait
+}
+
+struct Bar;
+
+impl Foo for Bar {
+    fn foo(_: fn(u16) -> ()) {}
+    //~^ ERROR method `foo` has an incompatible type for trait
+    //~| NOTE expected u8
+    fn bar(_: Option<u16>) {}
+    //~^ ERROR method `bar` has an incompatible type for trait
+    //~| NOTE expected u8
+    fn baz(_: (u16, u16)) {}
+    //~^ ERROR method `baz` has an incompatible type for trait
+    //~| NOTE expected u8
+    fn qux() -> u16 { 5u16 }
+    //~^ ERROR method `qux` has an incompatible type for trait
+    //~| NOTE expected u8
+}
+
+fn main() {}