Attempt to enable compiletest_rs on nightly on travis

src/tests/mod.rs

@@ -744,55 +744,3 @@ fn too_many_binds() {
             .is_err()
     );
 }
-
-// TODO: Need to use compiletest-rs or similar to make sure these don't compile.
-/*
-#[test]
-fn should_not_compile() {
-    let lua = Lua::new();
-    let globals = lua.globals();
-
-    // Should not allow userdata borrow to outlive lifetime of AnyUserData handle
-    struct MyUserData;
-    impl UserData for MyUserData {};
-    let userdata_ref;
-    {
-        let touter = globals.get::<_, Table>("touter").unwrap();
-        touter.set("userdata", lua.create_userdata(MyUserData)).unwrap();
-        let userdata = touter.get::<_, AnyUserData>("userdata").unwrap();
-        userdata_ref = userdata.borrow::<MyUserData>();
-    }
-
-    // Should not allow self borrow of lua, it can change addresses
-    globals.set("boom", lua.create_function(|_, _| {
-        lua.eval::<i32>("1 + 1", None)
-    })).unwrap();
-
-    // Should not allow Scope references to leak
-    struct MyUserdata(Rc<()>);
-    impl UserData for MyUserdata {}
-
-    let lua = Lua::new();
-    let mut r = None;
-    lua.scope(|scope| {
-        r = Some(scope.create_userdata(MyUserdata(Rc::new(()))).unwrap());
-    });
-
-    struct Test {
-        field: i32,
-    }
-
-    let lua = Lua::new();
-    lua.scope(|scope| {
-        let mut test = Test { field: 0 };
-
-        let f = scope
-            .create_function(|_, ()| {
-                test.field = 42;
-                Ok(())
-            })
-            .unwrap();
-        lua.globals().set("bad!", f).unwrap();
-    });
-}
-*/