1 files changed, 21 insertions, 0 deletions
diff --git a/src/test/ui/const-generics/generic_const_exprs/object-safety-err-ret.rs b/src/test/ui/const-generics/generic_const_exprs/object-safety-err-ret.rs
new file mode 100644
index 000000000..24d333aba
--- /dev/null
+++ b/src/test/ui/const-generics/generic_const_exprs/object-safety-err-ret.rs
@@ -0,0 +1,21 @@
+#![feature(generic_const_exprs)]
+#![allow(incomplete_features)]
+
+
+const fn bar<T: ?Sized>() -> usize { 7 }
+
+trait Foo {
+    fn test(&self) -> [u8; bar::<Self>()];
+}
+
+impl Foo for () {
+    fn test(&self) -> [u8; bar::<Self>()] {
+        [0; bar::<Self>()]
+    }
+}
+
+fn use_dyn(v: &dyn Foo) { //~ERROR the trait `Foo` cannot be made into an object
+    v.test();
+}
+
+fn main() {}