1 files changed, 26 insertions, 0 deletions
diff --git a/src/test/ui/box/thin_align.rs b/src/test/ui/box/thin_align.rs
new file mode 100644
index 000000000..3c61d0090
--- /dev/null
+++ b/src/test/ui/box/thin_align.rs
@@ -0,0 +1,26 @@
+#![feature(thin_box)]
+// run-pass
+use std::boxed::ThinBox;
+use std::error::Error;
+use std::ops::Deref;
+use std::fmt;
+
+fn main() {
+    let expected = "Foo error!";
+    let a: ThinBox<dyn Error> = ThinBox::new_unsize(Foo(expected));
+    let a = a.deref();
+    let msg = a.to_string();
+    assert_eq!(expected, msg);
+}
+
+#[derive(Debug)]
+#[repr(align(1024))]
+struct Foo(&'static str);
+
+impl fmt::Display for Foo {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        write!(f, "{}", self.0)
+    }
+}
+
+impl Error for Foo {}