1 files changed, 15 insertions, 0 deletions
diff --git a/src/test/ui/unsized/issue-91803.stderr b/src/test/ui/unsized/issue-91803.stderr
new file mode 100644
index 000000000..2dad9e892
--- /dev/null
+++ b/src/test/ui/unsized/issue-91803.stderr
@@ -0,0 +1,15 @@
+error[E0746]: return type cannot have an unboxed trait object
+  --> $DIR/issue-91803.rs:3:43
+   |
+LL | fn or<'a>(first: &'static dyn Foo<'a>) -> dyn Foo<'a> {
+   |                                           ^^^^^^^^^^^ doesn't have a size known at compile-time
+   |
+   = note: for information on `impl Trait`, see <https://doc.rust-lang.org/book/ch10-02-traits.html#returning-types-that-implement-traits>
+help: use `impl Foo<'a>` as the return type, as all return paths are of type `Box<_>`, which implements `Foo<'a>`
+   |
+LL | fn or<'a>(first: &'static dyn Foo<'a>) -> impl Foo<'a> {
+   |                                           ~~~~~~~~~~~~
+
+error: aborting due to previous error
+
+For more information about this error, try `rustc --explain E0746`.