1 files changed, 24 insertions, 0 deletions
diff --git a/tests/ui/generator/yield-in-box.rs b/tests/ui/generator/yield-in-box.rs
new file mode 100644
index 00000000000..dd6fa7c151a
--- /dev/null
+++ b/tests/ui/generator/yield-in-box.rs
@@ -0,0 +1,24 @@
+// run-pass
+// Test that box-statements with yields in them work.
+
+#![feature(generators, box_syntax, generator_trait)]
+use std::pin::Pin;
+use std::ops::Generator;
+use std::ops::GeneratorState;
+
+fn main() {
+    let x = 0i32;
+    || { //~ WARN unused generator that must be used
+        let y = 2u32;
+        {
+            let _t = box (&x, yield 0, &y);
+        }
+        match box (&x, yield 0, &y) {
+            _t => {}
+        }
+    };
+
+    let mut g = |_| box yield;
+    assert_eq!(Pin::new(&mut g).resume(1), GeneratorState::Yielded(()));
+    assert_eq!(Pin::new(&mut g).resume(2), GeneratorState::Complete(box 2));
+}