1 files changed, 17 insertions, 0 deletions
diff --git a/tests/ui/consts/const-ptr-nonnull-rpass.rs b/tests/ui/consts/const-ptr-nonnull-rpass.rs
new file mode 100644
index 000000000..67d52ad08
--- /dev/null
+++ b/tests/ui/consts/const-ptr-nonnull-rpass.rs
@@ -0,0 +1,17 @@
+// run-pass
+
+#![feature(ptr_internals, test)]
+
+extern crate test;
+use test::black_box as b; // prevent promotion of the argument and const-propagation of the result
+
+use std::ptr::NonNull;
+
+const DANGLING: NonNull<u32> = NonNull::dangling();
+const CASTED: NonNull<u32> = NonNull::cast(NonNull::<i32>::dangling());
+
+pub fn main() {
+    // Be super-extra paranoid and cast the fn items to fn pointers before blackboxing them.
+    assert_eq!(DANGLING, b::<fn() -> _>(NonNull::dangling)());
+    assert_eq!(CASTED, b::<fn() -> _>(NonNull::dangling)());
+}