1 files changed, 21 insertions, 0 deletions
diff --git a/tests/ui/structs/mutable-unit-struct-borrow-11267.rs b/tests/ui/structs/mutable-unit-struct-borrow-11267.rs
new file mode 100644
index 00000000000..d96c4a4e79b
--- /dev/null
+++ b/tests/ui/structs/mutable-unit-struct-borrow-11267.rs
@@ -0,0 +1,21 @@
+//! Regression test for https://github.com/rust-lang/rust/issues/11267
+
+//@ run-pass
+// Tests that unary structs can be mutably borrowed.
+
+struct Empty;
+
+trait T<U> {
+    fn next(&mut self) -> Option<U>;
+}
+impl T<isize> for Empty {
+    fn next(&mut self) -> Option<isize> { None }
+}
+
+fn do_something_with(a : &mut dyn T<isize>) {
+    println!("{:?}", a.next())
+}
+
+pub fn main() {
+    do_something_with(&mut Empty);
+}