1 files changed, 13 insertions, 0 deletions
diff --git a/tests/ui/pin-ergonomics/reborrow-once.rs b/tests/ui/pin-ergonomics/reborrow-once.rs
new file mode 100644
index 00000000000..241efadef7d
--- /dev/null
+++ b/tests/ui/pin-ergonomics/reborrow-once.rs
@@ -0,0 +1,13 @@
+#![feature(pin_ergonomics)]
+#![allow(dead_code, incomplete_features)]
+
+// Make sure with pin reborrowing that we can only get one mutable reborrow of a pinned reference.
+
+use std::pin::{pin, Pin};
+
+fn twice(_: Pin<&mut i32>, _: Pin<&mut i32>) {}
+
+fn main() {
+    let x = pin!(42);
+    twice(x, x); //~ ERROR cannot borrow
+}