Bug#811588:

[David Malcolm]

(I'm the upstream gcc author of -Wmisleading-indentation)

Code in question:
https://sources.debian.net/src/grail/3.1.0-2/tools/grail-test-atomic.c/#L148

Quoting it here:

        if (status != UFStatusSuccess)
          fprintf(stderr, "Error: failed to get device from event\n");
        else
          subscribe(grail_handle, device, subscribe_window, subscriptions, 2,
                    2);
          subscribe(grail_handle, device, subscribe_window, subscriptions, 3,
                    1);
          subscribe(grail_handle, device, subscribe_window, subscriptions, 4,
                    1);

IMHO the warning is justified.