+// Copyright 2018 The Rust Project Developers. See the COPYRIGHT
+// file at the top-level directory of this distribution and at
+// http://rust-lang.org/COPYRIGHT.
+//
+// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
+// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
+// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
+// option. This file may not be copied, modified, or distributed
+// except according to those terms.
+
+#![feature(const_raw_ptr_to_usize_cast, const_compare_raw_pointers, const_raw_ptr_deref)]
+
+fn main() {}
+
+// unconst and bad, will thus error in miri
+const X: bool = &1 as *const i32 == &2 as *const i32; //~ ERROR cannot be used
+// unconst and fine
+const X2: bool = 42 as *const i32 == 43 as *const i32;
+// unconst and fine
+const Y: usize = 42usize as *const i32 as usize + 1;
+// unconst and bad, will thus error in miri
+const Y2: usize = &1 as *const i32 as usize + 1; //~ ERROR cannot be used
+// unconst and fine
+const Z: i32 = unsafe { *(&1 as *const i32) };
+// unconst and bad, will thus error in miri
+const Z2: i32 = unsafe { *(42 as *const i32) }; //~ ERROR cannot be used
+const Z3: i32 = unsafe { *(44 as *const i32) }; //~ ERROR cannot be used
\ No newline at end of file