Added tests.

src/test/ui/error-codes/E0191.rs

@@ -14,5 +14,4 @@ trait Trait {
 
 type Foo = Trait; //~ ERROR E0191
 
-fn main() {
-}
+fn main() {}

src/test/ui/error-codes/E0719.rs

@@ -0,0 +1,17 @@
+// Copyright 2018 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(trait_alias)]
+
+trait I32Iterator = Iterator<Item = i32>;
+
+pub fn main() {
+    let _: &I32Iterator<Item = f32>; //~ ERROR E0719
+}

src/test/ui/issue-51947.rs

@@ -1,17 +0,0 @@
-// compile-pass
-
-#![crate_type = "lib"]
-#![feature(linkage)]
-
-// MergeFunctions will merge these via an anonymous internal
-// backing function, which must be named if ThinLTO buffers are used
-
-#[linkage = "weak"]
-pub fn fn1(a: u32, b: u32, c: u32) -> u32 {
-    a + b + c
-}
-
-#[linkage = "weak"]
-pub fn fn2(a: u32, b: u32, c: u32) -> u32 {
-    a + b + c
-}

src/test/ui/issues/issue-51947.rs

@@ -0,0 +1,27 @@
+// Copyright 2018 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.
+
+// compile-pass
+
+#![crate_type = "lib"]
+#![feature(linkage)]
+
+// MergeFunctions will merge these via an anonymous internal
+// backing function, which must be named if ThinLTO buffers are used
+
+#[linkage = "weak"]
+pub fn fn1(a: u32, b: u32, c: u32) -> u32 {
+    a + b + c
+}
+
+#[linkage = "weak"]
+pub fn fn2(a: u32, b: u32, c: u32) -> u32 {
+    a + b + c
+}

src/test/ui/traits/trait-alias-associated-type-rebound.rs

@@ -0,0 +1,17 @@
+// Copyright 2018 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(trait_alias)]
+
+trait I32Iterator = Iterator<Item = i32>;
+trait I32Iterator2 = I32Iterator<Item = i32>;
+trait U32Iterator = I32Iterator2<Item = i32>;
+
+pub fn main() {}