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Date: Tue, 19 Mar 2024 21:04:41 +0000
From: NRK <nrk@...root.org>
To: Jāāā Gustedt <jens.gustedt@...ia.fr>
Cc: Rich Felker <dalias@...c.org>, musl@...ts.openwall.com,
Mike Cui <cuicui@...il.com>
Subject: Re: Potential bug in __res_msend_rc() wrt to union
initialization.
> actually the introduction of `{}` versus `{0}` in C23 was not meant to
> provide any difference in semantics, just to make the syntax nicer and
> consistent with C++.
Regardless of what the intention was, the reality is that it *does* have
semantic difference. Specifically, empty initialization `{}` benefits
from the default initialization rules, which specify zero-ing out the
padding bits whereas `{0}` doesn't guarantee that.
- NRK
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