text: /* Test for bit-field widths not integer constant expressions but
     folding to integer constants: PR 42439.  */
  /* { dg-do compile } */
  /* { dg-options "-O2 -pedantic-errors" } */
  
  void
  f (void)
  {
    const int m = 1;
    ((void)(sizeof(struct { int i:!!m; }))); /* { dg-error "not an integer constant expression" } */
  }
  