Move a compile-fail test to ui

Author: oli-obk

…st-to-unsized-trait-object-suggestion.rs …st-to-unsized-trait-object-suggestion.rssrc/test/compile-fail/cast-to-unsized-trait-object-suggestion.rs renamed to src/test/ui/cast-to-unsized-trait-object-suggestion.rs src/test/compile-fail/cast-to-unsized-trait-object-suggestion.rs renamed to src/test/ui/cast-to-unsized-trait-object-suggestion.rs

@@ -10,11 +10,5 @@
 
 fn main() {
     &1 as Send;
-    //~^ ERROR cast to unsized type
-    //~| HELP try casting to a reference instead:
-    //~| SUGGESTION &1 as &Send;
     Box::new(1) as Send;
-    //~^ ERROR cast to unsized type
-    //~| HELP try casting to a `Box` instead:
-    //~| SUGGESTION Box::new(1) as Box<Send>;
 }

src/test/ui/cast-to-unsized-trait-object-suggestion.stderr

@@ -0,0 +1,18 @@
+error: cast to unsized type: `&{integer}` as `std::marker::Send`
+  --> $DIR/cast-to-unsized-trait-object-suggestion.rs:12:5
+   |
+12 |     &1 as Send;
+   |     ^^^^^^----
+   |           |
+   |           help: try casting to a reference instead: `&Send`
+
+error: cast to unsized type: `std::boxed::Box<{integer}>` as `std::marker::Send`
+  --> $DIR/cast-to-unsized-trait-object-suggestion.rs:16:5
+   |
+16 |     Box::new(1) as Send;
+   |     ^^^^^^^^^^^^^^^----
+   |                    |
+   |                    help: try casting to a `Box` instead: `Box<Send>`
+
+error: aborting due to 2 previous errors
+