1 files changed, 41 insertions, 0 deletions
diff --git a/third_party/rust/pin-project-lite/tests/ui/proper_unpin.rs b/third_party/rust/pin-project-lite/tests/ui/proper_unpin.rs
new file mode 100644
index 0000000000..3c85f2d77f
--- /dev/null
+++ b/third_party/rust/pin-project-lite/tests/ui/proper_unpin.rs
@@ -0,0 +1,41 @@
+use pin_project_lite::pin_project;
+use std::marker::PhantomPinned;
+
+struct Inner<T> {
+    val: T,
+}
+
+pin_project! {
+    struct Foo<T, U> {
+        #[pin]
+        inner: Inner<T>,
+        other: U,
+    }
+}
+
+pin_project! {
+    pub struct TrivialBounds {
+        #[pin]
+        field1: PhantomPinned,
+    }
+}
+
+pin_project! {
+    struct Bar<'a, T, U> {
+        #[pin]
+        inner: &'a mut Inner<T>,
+        other: U,
+    }
+}
+
+fn is_unpin<T: Unpin>() {}
+
+fn main() {
+    is_unpin::<Foo<PhantomPinned, ()>>(); //~ ERROR E0277
+    is_unpin::<Foo<(), PhantomPinned>>(); // Ok
+    is_unpin::<Foo<PhantomPinned, PhantomPinned>>(); //~ ERROR E0277
+
+    is_unpin::<TrivialBounds>(); //~ ERROR E0277
+
+    is_unpin::<Bar<'_, PhantomPinned, PhantomPinned>>(); //~ Ok
+}