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Date: Mon, 18 Mar 2024 22:39:25 +0000 (UTC)
From: Thorsten Glaser <tg@mirbsd.de>
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Subject: Re: [musl] Potential bug in __res_msend_rc() wrt to union initialisation.

NRK dixit:

>So something like:
>
>=09static union u zero;
>=09union u u =3D zero;

Even that gets funny when you have:

union {
=09struct {
=09=09char *foo;
=09=09uintptr_t bar;
=09} a;
=09struct {
=09=09uintptr_t baz;
=09=09char *bla;
=09} b;
} u;

In this case, u.b.baz can very well be 0x55555555
when you initialise u.a as {} (C23+) or {0}, e.g.
on TenDRA with the option to have nil pointers be
not a binary 0-bits representation.

bye,
//mirabilos
--=20
22:20=E2=8E=9C<asarch> The crazy that persists in his craziness becomes a m=
aster
22:21=E2=8E=9C<asarch> And the distance between the craziness and geniality=
 is
only measured by the success 18:35=E2=8E=9C<asarch> "Psychotics are consist=
ently
inconsistent. The essence of sanity is to be inconsistently inconsistent