1 files changed, 30 insertions, 0 deletions
diff --git a/src/test/ui/box/new-box.rs b/src/test/ui/box/new-box.rs
new file mode 100644
index 000000000..96a3b197f
--- /dev/null
+++ b/src/test/ui/box/new-box.rs
@@ -0,0 +1,30 @@
+// run-pass
+
+fn f(x: Box<isize>) {
+    let y: &isize = &*x;
+    println!("{}", *x);
+    println!("{}", *y);
+}
+
+trait Trait {
+    fn printme(&self);
+}
+
+struct Struct;
+
+impl Trait for Struct {
+    fn printme(&self) {
+        println!("hello world!");
+    }
+}
+
+fn g(x: Box<dyn Trait>) {
+    x.printme();
+    let y: &dyn Trait = &*x;
+    y.printme();
+}
+
+fn main() {
+    f(Box::new(1234));
+    g(Box::new(Struct) as Box<dyn Trait>);
+}