1 files changed, 26 insertions, 0 deletions
diff --git a/src/test/ui/feature-gates/feature-gate-unsized_fn_params.rs b/src/test/ui/feature-gates/feature-gate-unsized_fn_params.rs
new file mode 100644
index 000000000..9b868ed7a
--- /dev/null
+++ b/src/test/ui/feature-gates/feature-gate-unsized_fn_params.rs
@@ -0,0 +1,26 @@
+#[repr(align(256))]
+#[allow(dead_code)]
+struct A {
+    v: u8,
+}
+
+trait Foo {
+    fn foo(&self);
+}
+
+impl Foo for A {
+    fn foo(&self) {
+        assert_eq!(self as *const A as usize % 256, 0);
+    }
+}
+
+fn foo(x: dyn Foo) {
+    //~^ ERROR [E0277]
+    x.foo()
+}
+
+fn main() {
+    let x: Box<dyn Foo> = Box::new(A { v: 22 });
+    foo(*x);
+    //~^ ERROR [E0277]
+}