panic when instantiating an uninhabited type via mem::{uninitialized,zeroed}

src/test/run-pass/panic-uninitialized-zeroed.rs

@@ -0,0 +1,31 @@
+// 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.
+
+// This test checks that instantiating an uninhabited type via `mem::{uninitialized,zeroed}` results
+// in a runtime panic.
+
+#![feature(never_type)]
+
+use std::{mem, panic};
+
+struct Foo {
+    x: u8,
+    y: !,
+}
+
+fn main() {
+    unsafe {
+        panic::catch_unwind(|| mem::uninitialized::<!>()).is_err();
+        panic::catch_unwind(|| mem::zeroed::<!>()).is_err();
+
+        panic::catch_unwind(|| mem::uninitialized::<Foo>()).is_err();
+        panic::catch_unwind(|| mem::zeroed::<Foo>()).is_err();
+    }
+}