/*
* Copyright (c) 2015 - present Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/

int *always_null(void) {
   return 0;
}

void foo(void) {
   int *p = always_null();
   *p = 42;
}