Add missing tests for fixed issues

Closes #8761.
Closes #16010.
Closes #13033.
Closes #15094.

src/test/compile-fail/issue-13033.rs

@@ -0,0 +1,22 @@
+// 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.
+
+trait Foo {
+    fn bar(&mut self, other: &mut Foo);
+}
+
+struct Baz;
+
+impl Foo for Baz {
+    fn bar(&mut self, other: &Foo) {}
+    //~^ ERROR method `bar` has an incompatible type for trait: values differ in mutability [E0053]
+}
+
+fn main() {}

src/test/compile-fail/issue-15094.rs

@@ -0,0 +1,33 @@
+// 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.
+
+#![feature(overloaded_calls)]
+
+use std::{fmt, ops};
+
+struct Shower<T> {
+    x: T
+}
+
+impl<T: fmt::Show> ops::Fn<(), ()> for Shower<T> {
+    fn call(&self, _args: ()) {
+//~^ ERROR `call` has an incompatible type for trait: expected "rust-call" fn but found "Rust" fn
+        println!("{}", self.x);
+    }
+}
+
+fn make_shower<T>(x: T) -> Shower<T> {
+    Shower { x: x }
+}
+
+pub fn main() {
+    let show3 = make_shower(3i);
+    show3();
+}

src/test/compile-fail/issue-8761.rs

@@ -0,0 +1,18 @@
+// 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.
+
+enum Foo {
+    A = 1i64,
+    //~^ ERROR mismatched types: expected `int` but found `i64`
+    B = 2u8
+    //~^ ERROR mismatched types: expected `int` but found `u8`
+}
+
+fn main() {}

src/test/run-pass/issue-16452.rs

@@ -0,0 +1,17 @@
+// 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() {
+    if true { return }
+    match () {
+        () => { static MAGIC: uint = 0; }
+    }
+}
+