Move /src/test to /tests

tests/ui/impl-trait/in-trait/object-safety.rs

@@ -0,0 +1,22 @@
+#![feature(return_position_impl_trait_in_trait)]
+#![allow(incomplete_features)]
+
+use std::fmt::Debug;
+
+trait Foo {
+    fn baz(&self) -> impl Debug;
+}
+
+impl Foo for u32 {
+    fn baz(&self) -> u32 {
+        32
+    }
+}
+
+fn main() {
+    let i = Box::new(42_u32) as Box<dyn Foo>;
+    //~^ ERROR the trait `Foo` cannot be made into an object
+    //~| ERROR the trait `Foo` cannot be made into an object
+    let s = i.baz();
+    //~^ ERROR the trait `Foo` cannot be made into an object
+}