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From: "goldstein.w.n at gmail dot com" <sourceware-bugzilla@sourceware.org>
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Subject: [Bug string/29265] mbstowcs with NULL dst throws an incorrect
 warning (glibc == 2.35, gcc=12.0.1)
Date: Tue, 21 Jun 2022 04:26:17 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D29265

--- Comment #5 from Noah Goldstein <goldstein.w.n at gmail dot com> ---
(In reply to Siddhesh Poyarekar from comment #4)
> I'm not very picky about having a test for this FWIW, this seems very
> sensitive to optimizations and may not survive gcc updates.
>=20
> As for the fix, just remove the  __attr_access ((__write_only__, 1, 3)),
> it's incorrect in the context of mbstowcs definition.

You don't think its worth preserving if dst is non-null? In that case it is
meaningful no?

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