Rollup merge of #36723 - GuillaumeGomez:e0513, r=jonathandturner

E0513

Part of #35233

r? @jonathandturner

src/test/compile-fail/E0513.rs

@@ -0,0 +1,19 @@
+// Copyright 2016 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.
+
+use std::mem;
+
+fn main() {
+    unsafe {
+        let size = mem::size_of::<u32>();
+        mem::transmute_copy::<u32, [u8; size]>(&8_8); //~ ERROR E0513
+                                                      //~| NOTE no type for variable
+    }
+}