1  // Copyright 2017 The Go Authors. All rights reserved.
       2  // Use of this source code is governed by a BSD-style
       3  // license that can be found in the LICENSE file.
       4  
       5  #define issue20266 20266
       6  
       7  #ifndef def20266
       8  #error "expected def20266 to be defined"
       9  #endif