1 files changed, 15 insertions, 0 deletions
diff --git a/tests/ui/generator/drop-yield-twice.rs b/tests/ui/generator/drop-yield-twice.rs
new file mode 100644
index 000000000..f484cbb8d
--- /dev/null
+++ b/tests/ui/generator/drop-yield-twice.rs
@@ -0,0 +1,15 @@
+#![feature(negative_impls, generators)]
+
+struct Foo(i32);
+impl !Send for Foo {}
+
+fn main() {
+    assert_send(|| { //~ ERROR generator cannot be sent between threads safely
+        let guard = Foo(42);
+        yield;
+        drop(guard);
+        yield;
+    })
+}
+
+fn assert_send<T: Send>(_: T) {}