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diff --git a/src/test/ui/traits/object/safety.stderr b/src/test/ui/traits/object/safety.stderr
new file mode 100644
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+++ b/src/test/ui/traits/object/safety.stderr
@@ -0,0 +1,49 @@
+error[E0038]: the trait `Tr` cannot be made into an object
+  --> $DIR/safety.rs:15:22
+   |
+LL |     let _: &dyn Tr = &St;
+   |                      ^^^ `Tr` cannot be made into an object
+   |
+note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
+  --> $DIR/safety.rs:4:8
+   |
+LL | trait Tr {
+   |       -- this trait cannot be made into an object...
+LL |     fn foo();
+   |        ^^^ ...because associated function `foo` has no `self` parameter
+   = note: required because of the requirements on the impl of `CoerceUnsized<&dyn Tr>` for `&St`
+   = note: required by cast to type `&dyn Tr`
+help: consider turning `foo` into a method by giving it a `&self` argument
+   |
+LL |     fn foo(&self);
+   |            +++++
+help: alternatively, consider constraining `foo` so it does not apply to trait objects
+   |
+LL |     fn foo() where Self: Sized;
+   |              +++++++++++++++++
+
+error[E0038]: the trait `Tr` cannot be made into an object
+  --> $DIR/safety.rs:15:12
+   |
+LL |     let _: &dyn Tr = &St;
+   |            ^^^^^^^ `Tr` cannot be made into an object
+   |
+note: for a trait to be "object safe" it needs to allow building a vtable to allow the call to be resolvable dynamically; for more information visit <https://doc.rust-lang.org/reference/items/traits.html#object-safety>
+  --> $DIR/safety.rs:4:8
+   |
+LL | trait Tr {
+   |       -- this trait cannot be made into an object...
+LL |     fn foo();
+   |        ^^^ ...because associated function `foo` has no `self` parameter
+help: consider turning `foo` into a method by giving it a `&self` argument
+   |
+LL |     fn foo(&self);
+   |            +++++
+help: alternatively, consider constraining `foo` so it does not apply to trait objects
+   |
+LL |     fn foo() where Self: Sized;
+   |              +++++++++++++++++
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0038`.