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diff --git a/src/test/ui/object-safety/issue-19538.stderr b/src/test/ui/object-safety/issue-19538.stderr
new file mode 100644
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+error[E0038]: the trait `Bar` cannot be made into an object
+  --> $DIR/issue-19538.rs:17:15
+   |
+LL |     let test: &mut dyn Bar = &mut thing;
+   |               ^^^^^^^^^^^^ `Bar` 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/issue-19538.rs:2:8
+   |
+LL |     fn foo<T>(&self, val: T);
+   |        ^^^ ...because method `foo` has generic type parameters
+...
+LL | trait Bar: Foo { }
+   |       --- this trait cannot be made into an object...
+   = help: consider moving `foo` to another trait
+
+error[E0038]: the trait `Bar` cannot be made into an object
+  --> $DIR/issue-19538.rs:17:30
+   |
+LL |     let test: &mut dyn Bar = &mut thing;
+   |                              ^^^^^^^^^^ `Bar` 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/issue-19538.rs:2:8
+   |
+LL |     fn foo<T>(&self, val: T);
+   |        ^^^ ...because method `foo` has generic type parameters
+...
+LL | trait Bar: Foo { }
+   |       --- this trait cannot be made into an object...
+   = help: consider moving `foo` to another trait
+   = note: required because of the requirements on the impl of `CoerceUnsized<&mut dyn Bar>` for `&mut Thing`
+   = note: required by cast to type `&mut dyn Bar`
+
+error: aborting due to 2 previous errors
+
+For more information about this error, try `rustc --explain E0038`.