1 files changed, 42 insertions, 0 deletions
diff --git a/tests/ui/generator/partial-drop.rs b/tests/ui/generator/partial-drop.rs
new file mode 100644
index 00000000000..c872fb7f3e6
--- /dev/null
+++ b/tests/ui/generator/partial-drop.rs
@@ -0,0 +1,42 @@
+// compile-flags: -Zdrop-tracking
+
+#![feature(negative_impls, generators)]
+
+struct Foo;
+impl !Send for Foo {}
+
+struct Bar {
+    foo: Foo,
+    x: i32,
+}
+
+fn main() {
+    assert_send(|| {
+        //~^ ERROR generator cannot be sent between threads safely
+        // FIXME: it would be nice to make this work.
+        let guard = Bar { foo: Foo, x: 42 };
+        drop(guard.foo);
+        yield;
+    });
+
+    assert_send(|| {
+        //~^ ERROR generator cannot be sent between threads safely
+        // FIXME: it would be nice to make this work.
+        let guard = Bar { foo: Foo, x: 42 };
+        drop(guard);
+        guard.foo = Foo;
+        guard.x = 23;
+        yield;
+    });
+
+    assert_send(|| {
+        //~^ ERROR generator cannot be sent between threads safely
+        // FIXME: it would be nice to make this work.
+        let guard = Bar { foo: Foo, x: 42 };
+        let Bar { foo, x } = guard;
+        drop(foo);
+        yield;
+    });
+}
+
+fn assert_send<T: Send>(_: T) {}