1 files changed, 22 insertions, 0 deletions
diff --git a/tests/ui/stdlib-unit-tests/not-sync.rs b/tests/ui/stdlib-unit-tests/not-sync.rs
new file mode 100644
index 000000000..f4648994f
--- /dev/null
+++ b/tests/ui/stdlib-unit-tests/not-sync.rs
@@ -0,0 +1,22 @@
+use std::cell::{Cell, RefCell};
+use std::rc::{Rc, Weak};
+use std::sync::mpsc::{Receiver, Sender};
+
+fn test<T: Sync>() {}
+
+fn main() {
+    test::<Cell<i32>>();
+    //~^ ERROR `Cell<i32>` cannot be shared between threads safely [E0277]
+    test::<RefCell<i32>>();
+    //~^ ERROR `RefCell<i32>` cannot be shared between threads safely [E0277]
+
+    test::<Rc<i32>>();
+    //~^ ERROR `Rc<i32>` cannot be shared between threads safely [E0277]
+    test::<Weak<i32>>();
+    //~^ ERROR `std::rc::Weak<i32>` cannot be shared between threads safely [E0277]
+
+    test::<Receiver<i32>>();
+    //~^ ERROR `std::sync::mpsc::Receiver<i32>` cannot be shared between threads safely [E0277]
+    test::<Sender<i32>>();
+    //~^ ERROR `Sender<i32>` cannot be shared between threads safely [E0277]
+}