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From: "siddhesh at sourceware dot org" <sourceware-bugzilla@sourceware.org>
To: glibc-bugs@sourceware.org
Subject: [Bug string/29265] mbstowcs with NULL dst throws an incorrect
 warning (glibc == 2.35, gcc=12.0.1)
Date: Tue, 21 Jun 2022 02:37:41 +0000
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https://sourceware.org/bugzilla/show_bug.cgi?id=3D29265

Siddhesh Poyarekar <siddhesh at sourceware dot org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1
                 CC|                            |siddhesh at sourceware dot=
 org
   Last reconfirmed|                            |2022-06-21

--- Comment #1 from Siddhesh Poyarekar <siddhesh at sourceware dot org> ---
Agreed, the __attr_access ((__write_only__, 1, 3)) is incorrect for mbstowc=
s,
the former requires the size argument to accurately reflect the object argu=
ment
(i.e. 0 for a NULL pointer) whereas the mbstowcs implementation is expected=
 to
ignore the size argument if the first argument is NULL.  Would you like to
write a patch to fix this up?

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