1 files changed, 38 insertions, 0 deletions
diff --git a/tests/ui/pin_project/proper_unpin.rs b/tests/ui/pin_project/proper_unpin.rs
new file mode 100644
index 0000000..e61789b
--- /dev/null
+++ b/tests/ui/pin_project/proper_unpin.rs
@@ -0,0 +1,38 @@
+use pin_project::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]
+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
+}