Add cross-crate error message tests

Author: jroesch

src/test/auxiliary/default_ty_param_cross_crate_crate.rs

@@ -0,0 +1,19 @@
+// 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.
+
+#![crate_type = "lib"]
+#![crate_name = "default_param_test"]
+
+use std::marker::PhantomData;
+
+pub struct Foo<A, B>(PhantomData<(A, B)>);
+
+pub fn bleh<A=i32, X=char>() -> Foo<A, X> { Foo(PhantomData) }
+

src/test/compile-fail/default_ty_param_conflict_cross_crate.rs

@@ -0,0 +1,20 @@
+// 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.
+
+use std::fmt::Debug;
+use std::collections::HashMap;
+
+fn foo<R=()>(x: HashMap<i32, i32, R>) ->  HashMap<i32, i32, R> { x }
+fn bar<R=char>(x: HashMap<i32, i32, R>) {}
+
+fn main() {
+    let x: HashMap<i32, i32, _> = foo(panic!());
+    bar(x);
+}