Re: rubeyes: realloc(ptr, 0) is UB?

From	Keith Thompson <Keith.S.Thompson+u@gmail.com>
Newsgroups	comp.lang.c
Subject	Re: rubeyes: realloc(ptr, 0) is UB?
Date	2024-01-20 19:50 -0800
Organization	None to speak of
Message-ID	<87msszbb08.fsf@nosuchdomain.example.com> (permalink)
References	(6 earlier) <uobqhg$2mt8c$1@dont-email.me> <20240118112920.465@kylheku.com> <uoc030$2ndid$2@dont-email.me> <20240118144021.3@kylheku.com> <87r0iech8j.fsf@nosuchdomain.example.com>

Show all headers | View raw

Keith Thompson <Keith.S.Thompson+u@gmail.com> writes:
> Kaz Kylheku <433-929-6894@kylheku.com> writes:
>> On 2024-01-18, James Kuyper <jameskuyper@alumni.caltech.edu> wrote:
>>> It's OK to rely upon the requirements imposed by an implementation when
>>> the C standard doesn't impose any - but when you do so, you need to make
>>> sure you actually know what those requirements are.
>>
>> Exactly, and in this specific case, it's not worth the effort compared
>> to writing a realloc wrapper that avoids the undefined behavior, while
>> itself providing a C99 conforming one.
>>
>> I'm not going to use realloc(ptr, 0) and check everyone's documentation.
>>
>> And then what if I don't find it defined? The what? Back to the
>> wrapper I could have just written in the first place.
> [...]
>
> I think I would have *liked* to see C23 drop the special permission
> to return a null pointer for a requested size of zero.  C11 says (and
> this applies to malloc, realloc, and all other allocation functions):
>
>     If the space cannot be allocated, a null pointer is returned. If
>     the size of the space requested is zero, the behavior is
>     implementation-defined: either a null pointer is returned, or
>     the behavior is as if the size were some nonzero value, except
>     that the returned pointer shall not be used to access an object.
>
> This could have been changed to:
>
>     If the space cannot be allocated, a null pointer is returned. If
>     the size of the space requested is zero, the behavior is as
>     if the size were some nonzero value, except that the returned
>     pointer shall not be used to access an object.
>
> Any existing implementations that always return a null pointer
> for malloc(0) would have to be updated.  That shouldn't be a
> great burden.
>
> Note that malloc(0) or realloc(ptr, 0) can still fail and return
> a null pointer if no space can be allocated, so all allocations
> should still be checked.  But with this proposed change, code
> could rely on realloc(ptr, 0) returning a non-null pointer *unless*
> available memory is critically low -- pretty much the same as in C11,
> except that a null pointer would be an indication that something
> is seriously wrong.
>
> (I remember seeing a discussion about making the behavior of
> realloc(ptr, 0) undefined.  I'm making inquiries, and I'll follow
> up if I learn anything relevant.)

I got a response from JeanHeyd Meneide.

If realloc(ptr, 0) returns a null pointer there's no way to tell whether
allocation failed (and ptr has not been freed), or the implementation
returns a null pointer for zero-sized allocations (and ptr has been
freed).  Some implementations set errno, but C doesn't require it.

C17 added this in 7.31.11, Future library directions:

    Invoking realloc with a size argument equal to zero is an
    obsolescent feature.

More references:

DR 400 <https://www.open-std.org/jtc1/sc22/wg14/www/docs/summary.htm#dr_400>
"realloc with size zero problems"

N2438 <https://www.open-std.org/jtc1/sc22/wg14/www/docs/n2438.htm>
"Clarification Request", "Realloc with size 0 ambiguity"

N2464 <https://www.open-std.org/jtc1/sc22/wg14/www/docs/n2464.pdf>
This is the paper that proposed making realloc(?, 0) undefined behavior,
whether the first argument is null or not.  Part of the rationale was to
allow POSIX to define it however they please.

N2665 <https://www.open-std.org/jtc1/sc22/wg14/www/docs/n2665.pdf>
Not directly relevant; it just removes the statement that zero-sized
reallocations are obsolescent, since it's no longer necessary.

Personally, I still think it would have been cleaner to remove the
permission for any allocation functions to return a null pointer, even
with a requested size of 0, unless there isn't enough memory for the
allocation to succeed.

-- 
Keith Thompson (The_Other_Keith) Keith.S.Thompson+u@gmail.com
Working, but not speaking, for Medtronic
void Void(void) { Void(); } /* The recursive call of the void */

Thread

*rubeyes*: realloc(ptr, 0) is UB? Kaz Kylheku <433-929-6894@kylheku.com> - 2024-01-17 00:32 +0000
  Re: *rubeyes*: realloc(ptr, 0) is UB? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-01-17 01:57 +0000
    Re: *rubeyes*: realloc(ptr, 0) is UB? Kaz Kylheku <433-929-6894@kylheku.com> - 2024-01-17 02:32 +0000
      Re: *rubeyes*: realloc(ptr, 0) is UB? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-01-17 03:06 +0000
        Re: *rubeyes*: realloc(ptr, 0) is UB? Kaz Kylheku <433-929-6894@kylheku.com> - 2024-01-17 03:08 +0000
          Re: *rubeyes*: realloc(ptr, 0) is UB? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-01-17 03:34 +0000
  Re: *rubeyes*: realloc(ptr, 0) is UB? David Brown <david.brown@hesbynett.no> - 2024-01-17 11:37 +0100
    Re: *rubeyes*: realloc(ptr, 0) is UB? Kaz Kylheku <433-929-6894@kylheku.com> - 2024-01-17 17:47 +0000
      Re: *rubeyes*: realloc(ptr, 0) is UB? BGB <cr88192@gmail.com> - 2024-01-17 12:39 -0600
  Re: *rubeyes*: realloc(ptr, 0) is UB? scott@slp53.sl.home (Scott Lurndal) - 2024-01-17 16:27 +0000
    Re: *rubeyes*: realloc(ptr, 0) is UB? Kaz Kylheku <433-929-6894@kylheku.com> - 2024-01-17 17:57 +0000
      Re: *rubeyes*: realloc(ptr, 0) is UB? scott@slp53.sl.home (Scott Lurndal) - 2024-01-17 22:13 +0000
        Re: *rubeyes*: realloc(ptr, 0) is UB? Kaz Kylheku <433-929-6894@kylheku.com> - 2024-01-17 22:31 +0000
        Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-01-18 00:23 -0800
          Re: *rubeyes*: realloc(ptr, 0) is UB? scott@slp53.sl.home (Scott Lurndal) - 2024-01-18 15:14 +0000
            Re: *rubeyes*: realloc(ptr, 0) is UB? James Kuyper <jameskuyper@alumni.caltech.edu> - 2024-01-18 13:26 -0500
              Re: *rubeyes*: realloc(ptr, 0) is UB? Kaz Kylheku <433-929-6894@kylheku.com> - 2024-01-18 19:31 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? James Kuyper <jameskuyper@alumni.caltech.edu> - 2024-01-18 15:01 -0500
                Re: *rubeyes*: realloc(ptr, 0) is UB? Kaz Kylheku <433-929-6894@kylheku.com> - 2024-01-18 22:43 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-01-18 15:14 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-01-18 16:13 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Kaz Kylheku <433-929-6894@kylheku.com> - 2024-01-19 03:06 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-01-21 03:47 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Richard Kettlewell <invalid@invalid.invalid> - 2024-01-22 10:21 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Kaz Kylheku <433-929-6894@kylheku.com> - 2024-01-22 18:54 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-01-22 20:01 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Richard Kettlewell <invalid@invalid.invalid> - 2024-01-23 09:35 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-01-23 09:08 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Kaz Kylheku <433-929-6894@kylheku.com> - 2024-01-23 21:56 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-01-26 05:51 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Richard Kettlewell <invalid@invalid.invalid> - 2024-01-24 23:37 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-01-26 07:54 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Richard Kettlewell <invalid@invalid.invalid> - 2024-01-26 21:04 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-02-01 05:39 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-01-19 20:29 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Kaz Kylheku <433-929-6894@kylheku.com> - 2024-01-19 21:35 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-01-21 03:08 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Kaz Kylheku <433-929-6894@kylheku.com> - 2024-01-21 17:32 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-01-25 09:08 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Kaz Kylheku <433-929-6894@kylheku.com> - 2024-01-25 18:49 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-01-25 11:35 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-01-25 11:45 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-01-25 13:40 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? David Brown <david.brown@hesbynett.no> - 2024-01-26 09:27 +0100
                Re: *rubeyes*: realloc(ptr, 0) is UB? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-01-29 13:21 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-01-26 12:20 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Kaz Kylheku <433-929-6894@kylheku.com> - 2024-01-28 18:17 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-01-31 01:02 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? James Kuyper <jameskuyper@alumni.caltech.edu> - 2024-01-28 20:09 -0500
                Re: *rubeyes*: realloc(ptr, 0) is UB? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-01-19 13:37 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Kaz Kylheku <433-929-6894@kylheku.com> - 2024-01-19 21:50 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-01-19 14:16 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-01-21 03:25 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? bart <bc@freeuk.com> - 2024-01-21 11:55 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-01-21 09:41 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-01-21 12:22 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? bart <bc@freeuk.com> - 2024-01-21 20:34 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? David Brown <david.brown@hesbynett.no> - 2024-01-21 21:54 +0100
                Re: *rubeyes*: realloc(ptr, 0) is UB? Kaz Kylheku <433-929-6894@kylheku.com> - 2024-01-21 21:20 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? David Brown <david.brown@hesbynett.no> - 2024-01-22 09:20 +0100
                Re: *rubeyes*: realloc(ptr, 0) is UB? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-01-21 13:31 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Kaz Kylheku <433-929-6894@kylheku.com> - 2024-01-21 21:49 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? bart <bc@freeuk.com> - 2024-01-21 22:09 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2024-01-21 23:49 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? David Brown <david.brown@hesbynett.no> - 2024-01-22 09:24 +0100
                Re: *rubeyes*: realloc(ptr, 0) is UB? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-01-22 22:09 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? David Brown <david.brown@hesbynett.no> - 2024-01-23 09:28 +0100
                Re: *rubeyes*: realloc(ptr, 0) is UB? bart <bc@freeuk.com> - 2024-01-21 21:37 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-01-21 17:05 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-01-21 17:09 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Kaz Kylheku <433-929-6894@kylheku.com> - 2024-01-21 21:16 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-01-21 17:14 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-01-21 17:04 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2024-01-22 02:05 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-01-21 18:37 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? bart <bc@freeuk.com> - 2024-01-22 11:55 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? bart <bc@freeuk.com> - 2024-01-22 12:00 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-01-22 22:08 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Lew Pitcher <lew.pitcher@digitalfreehold.ca> - 2024-01-21 20:51 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Richard Kettlewell <invalid@invalid.invalid> - 2024-01-22 10:22 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? bart <bc@freeuk.com> - 2024-01-22 11:27 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Kaz Kylheku <433-929-6894@kylheku.com> - 2024-01-22 19:36 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? kalevi@kolttonen.fi (Kalevi Kolttonen) - 2024-01-22 20:40 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? bart <bc@freeuk.com> - 2024-01-22 22:14 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-01-22 14:38 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-01-22 14:40 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? scott@slp53.sl.home (Scott Lurndal) - 2024-01-22 22:45 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-01-22 14:54 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Richard Kettlewell <invalid@invalid.invalid> - 2024-01-22 23:05 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-01-21 04:04 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Malcolm McLean <malcolm.arthur.mclean@gmail.com> - 2024-01-22 12:36 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-01-22 08:23 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-01-22 08:27 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? scott@slp53.sl.home (Scott Lurndal) - 2024-01-22 16:34 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-01-24 04:42 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Spiros Bousbouras <spibou@gmail.com> - 2024-01-22 19:23 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-01-22 20:20 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-01-21 06:55 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-01-20 19:50 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-01-21 05:11 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Kaz Kylheku <433-929-6894@kylheku.com> - 2024-01-21 05:20 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-01-21 14:38 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-01-21 14:33 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-01-21 15:04 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Richard Kettlewell <invalid@invalid.invalid> - 2024-01-22 08:12 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-01-22 08:06 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Richard Kettlewell <invalid@invalid.invalid> - 2024-01-22 18:17 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? scott@slp53.sl.home (Scott Lurndal) - 2024-01-22 18:43 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Richard Kettlewell <invalid@invalid.invalid> - 2024-01-22 19:11 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-01-24 02:46 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? scott@slp53.sl.home (Scott Lurndal) - 2024-01-24 14:54 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-01-22 20:08 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-01-23 19:28 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-01-24 06:33 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Kaz Kylheku <433-929-6894@kylheku.com> - 2024-01-24 07:46 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? Kaz Kylheku <433-929-6894@kylheku.com> - 2024-01-24 07:44 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? David Brown <david.brown@hesbynett.no> - 2024-01-24 10:41 +0100
                Re: *rubeyes*: realloc(ptr, 0) is UB? Keith Thompson <Keith.S.Thompson+u@gmail.com> - 2024-01-24 08:34 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-02-10 02:47 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? James Kuyper <jameskuyper@alumni.caltech.edu> - 2024-01-24 12:23 -0500
                Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-01-21 05:10 -0800
            Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-01-20 15:41 -0800
    Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-01-17 17:46 -0800
      Re: *rubeyes*: realloc(ptr, 0) is UB? scott@slp53.sl.home (Scott Lurndal) - 2024-01-18 15:12 +0000
        Re: *rubeyes*: realloc(ptr, 0) is UB? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-01-18 20:47 +0000
          Re: *rubeyes*: realloc(ptr, 0) is UB? Kaz Kylheku <433-929-6894@kylheku.com> - 2024-01-18 22:45 +0000
            Re: *rubeyes*: realloc(ptr, 0) is UB? scott@slp53.sl.home (Scott Lurndal) - 2024-01-18 23:47 +0000
              Re: *rubeyes*: realloc(ptr, 0) is UB? Kaz Kylheku <433-929-6894@kylheku.com> - 2024-01-19 00:03 +0000
              Re: *rubeyes*: realloc(ptr, 0) is UB? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-01-19 21:11 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? scott@slp53.sl.home (Scott Lurndal) - 2024-01-19 21:31 +0000
            Re: *rubeyes*: realloc(ptr, 0) is UB? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-01-18 23:48 +0000
        Re: *rubeyes*: realloc(ptr, 0) is UB? "Chris M. Thomasson" <chris.m.thomasson.1@gmail.com> - 2024-01-18 13:34 -0800
        Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-01-19 16:14 -0800
          Re: *rubeyes*: realloc(ptr, 0) is UB? scott@slp53.sl.home (Scott Lurndal) - 2024-01-20 00:26 +0000
            Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-01-23 11:53 -0800
  Re: *rubeyes*: realloc(ptr, 0) is UB? Blue-Maned_Hawk <bluemanedhawk@invalid.invalid> - 2024-01-17 23:03 +0000
    Re: *rubeyes*: realloc(ptr, 0) is UB? Kaz Kylheku <433-929-6894@kylheku.com> - 2024-01-18 00:10 +0000
      Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-01-17 17:38 -0800
      Re: *rubeyes*: realloc(ptr, 0) is UB? Blue-Maned_Hawk <bluemanedhawk@invalid.invalid> - 2024-01-18 22:20 +0000
        Re: *rubeyes*: realloc(ptr, 0) is UB? Kaz Kylheku <433-929-6894@kylheku.com> - 2024-01-18 22:47 +0000
          Re: *rubeyes*: realloc(ptr, 0) is UB? Blue-Maned_Hawk <bluemanedhawk@invalid.invalid> - 2024-01-19 16:27 +0000
            Re: *rubeyes*: realloc(ptr, 0) is UB? Kaz Kylheku <433-929-6894@kylheku.com> - 2024-01-19 16:39 +0000
              Re: *rubeyes*: realloc(ptr, 0) is UB? Blue-Maned_Hawk <bluemanedhawk@invalid.invalid> - 2024-01-22 23:12 +0000
                Re: *rubeyes*: realloc(ptr, 0) is UB? James Kuyper <jameskuyper@alumni.caltech.edu> - 2024-01-23 01:16 -0500
                Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-01-23 22:15 -0800
                Re: *rubeyes*: realloc(ptr, 0) is UB? James Kuyper <jameskuyper@alumni.caltech.edu> - 2024-01-25 13:27 -0500
        Re: *rubeyes*: realloc(ptr, 0) is UB? James Kuyper <jameskuyper@alumni.caltech.edu> - 2024-01-18 18:37 -0500
    Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-01-17 17:35 -0800
      Re: *rubeyes*: realloc(ptr, 0) is UB? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-01-18 05:54 +0000
        Re: *rubeyes*: realloc(ptr, 0) is UB? Kaz Kylheku <433-929-6894@kylheku.com> - 2024-01-18 05:59 +0000
          Re: *rubeyes*: realloc(ptr, 0) is UB? Lawrence D'Oliveiro <ldo@nz.invalid> - 2024-01-18 06:59 +0000
        Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-01-18 00:18 -0800
      Re: *rubeyes*: realloc(ptr, 0) is UB? Blue-Maned_Hawk <bluemanedhawk@invalid.invalid> - 2024-01-18 22:21 +0000
  Re: *rubeyes*: realloc(ptr, 0) is UB? Tim Rentsch <tr.17687@z991.linuxsc.com> - 2024-01-17 17:45 -0800

csiph-web