1 files changed, 16 insertions, 0 deletions
diff --git a/tests/ui/consts/const-ptr-unique-rpass.rs b/tests/ui/consts/const-ptr-unique-rpass.rs
new file mode 100644
index 000000000..fc13bb98b
--- /dev/null
+++ b/tests/ui/consts/const-ptr-unique-rpass.rs
@@ -0,0 +1,16 @@
+// 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::Unique;
+
+
+const PTR: *mut u32 = Unique::dangling().as_ptr();
+
+pub fn main() {
+    // Be super-extra paranoid and cast the fn items to fn pointers before blackboxing them.
+    assert_eq!(PTR, b::<fn() -> _>(Unique::<u32>::dangling)().as_ptr());
+}