1const std = @import("std");
 2const expect = std.testing.expect;
 3const builtin = @import("builtin");
 4
 5test "struct contains null pointer which contains original struct" {
 6    if (builtin.zig_backend == .stage2_sparc64) return error.SkipZigTest; // TODO
 7    if (builtin.zig_backend == .stage2_spirv) return error.SkipZigTest;
 8
 9    var x: ?*NodeLineComment = null;
10    _ = &x;
11    try expect(x == null);
12}
13
14pub const Node = struct {
15    id: Id,
16    comment: ?*NodeLineComment,
17
18    pub const Id = enum {
19        Root,
20        LineComment,
21    };
22};
23
24pub const NodeLineComment = struct {
25    base: Node,
26};