bug#23600: 25.1.50; encode-time returns wrong result

[Eli Zaretskii]

> Cc: 23600@debbugs.gnu.org, Eli Zaretskii <eliz@gnu.org>
> From: Paul Eggert <eggert@cs.ucla.edu>
> Date: Wed, 1 Jun 2016 01:19:50 -0700
> 
> +  if (strncmp (str, "TZ=<", 4) == 0)
> +    {
> +      /* MS-Windows does not support POSIX.1-2001 angle-bracket TZ
> +      abbreviation syntax.  Convert to POSIX.1-1988 syntax if possible,
> +      and to the undocumented placeholder "ZZZ" otherwise.  */
> +      bool supported_abbr = true;
> +      for (char *p = str + 4; *p; p++)
> +     {
> +       if (('0' <= *p && *p <= '9') || *p == '-' || *p == '+')
> +         supported_abbr = false;
> +       else if (*p == '>')
> +         {
> +           ptrdiff_t abbrlen;
> +           if (supported_abbr)
> +             {
> +               abbrlen = p - (str + 4);
> +               memmove (str + 3, str + 4, abbrlen);
> +             }
> +           else
> +             {
> +               abbrlen = 3;
> +               memset (str + 3, 'Z', abbrlen);
> +             }
> +           memmove (str + 3 + abbrlen, p + 1, strlen (p));
> +           break;
> +         }

Do callers of putenv expect the argument to be destroyed?

Thanks.