This file is indexed.

/usr/lib/gcc/x86_64-linux-gnu/6/include/d/rt/invariant.d is in libgphobos-6-dev 6.4.0-17ubuntu1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

 1
 2
 3
 4
 5
 6
 7
 8
 9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
/**
 * Implementation of invariant support routines.
 *
 * Copyright: Copyright Digital Mars 2007 - 2010.
 * License:   $(WEB www.boost.org/LICENSE_1_0.txt, Boost License 1.0).
 * Authors:   Walter Bright
 */

/*          Copyright Digital Mars 2007 - 2010.
 * Distributed under the Boost Software License, Version 1.0.
 *    (See accompanying file LICENSE or copy at
 *          http://www.boost.org/LICENSE_1_0.txt)
 */


/**
 *
 */
void _d_invariant(Object o)
{   ClassInfo c;

    //printf("__d_invariant(%p)\n", o);

    // BUG: needs to be filename/line of caller, not library routine
    assert(o !is null); // just do null check, not invariant check

    c = typeid(o);
    do
    {
        if (c.classInvariant)
        {
            (*c.classInvariant)(o);
        }
        c = c.base;
    } while (c);
}