1 files changed, 17 insertions, 0 deletions
diff --git a/src/test/ui/feature-gates/feature-gate-unsafe_pin_internals.rs b/src/test/ui/feature-gates/feature-gate-unsafe_pin_internals.rs
new file mode 100644
index 000000000..0680d2344
--- /dev/null
+++ b/src/test/ui/feature-gates/feature-gate-unsafe_pin_internals.rs
@@ -0,0 +1,17 @@
+// edition:2018
+#![forbid(incomplete_features, unsafe_code)]
+#![feature(unsafe_pin_internals)]
+//~^ ERROR the feature `unsafe_pin_internals` is incomplete and may not be safe to use
+
+use core::{marker::PhantomPinned, pin::Pin};
+
+/// The `unsafe_pin_internals` is indeed unsound.
+fn non_unsafe_pin_new_unchecked<T>(pointer: &mut T) -> Pin<&mut T> {
+    Pin { pointer }
+}
+
+fn main() {
+    let mut self_referential = PhantomPinned;
+    let _: Pin<&mut PhantomPinned> = non_unsafe_pin_new_unchecked(&mut self_referential);
+    core::mem::forget(self_referential); // move and disable drop glue!
+}