limit packed copy-out to non-generic Copy structs

src/test/compile-fail/deriving-with-repr-packed-not-copy.rs

@@ -8,6 +8,8 @@
 // option. This file may not be copied, modified, or distributed
 // except according to those terms.
 
+#![deny(safe_packed_borrows)]
+
 // check that derive on a packed struct with non-Copy fields
 // correctly. This can't be made to work perfectly because
 // we can't just use the field from the struct as it might
@@ -17,12 +19,10 @@
 struct Y(usize);
 
 #[derive(PartialEq)]
-//~^ ERROR cannot move out of borrowed
-//~| ERROR cannot move out of borrowed
-//~| ERROR cannot move out of borrowed
-//~| ERROR cannot move out of borrowed
 #[repr(packed)]
 struct X(Y);
+//~^ ERROR #[derive] can't be used on a non-Copy #[repr(packed)]
+//~| hard error
 
 fn main() {
 }